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// (C) Copyright 2008-10 Anthony Williams
// (C) Copyright 2011-2015 Vicente J. Botet Escriba
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_THREAD_FUTURE_HPP
#define BOOST_THREAD_FUTURE_HPP
#include <boost/thread/detail/config.hpp>
// boost::thread::future requires exception handling
// due to boost::exception::exception_ptr dependency
//#define BOOST_THREAD_CONTINUATION_SYNC
#ifndef BOOST_NO_EXCEPTIONS
#include <boost/thread/condition_variable.hpp>
#include <boost/thread/detail/move.hpp>
#include <boost/thread/detail/invoker.hpp>
#include <boost/thread/detail/invoke.hpp>
#include <boost/thread/detail/is_convertible.hpp>
#include <boost/thread/exceptional_ptr.hpp>
#include <boost/thread/futures/future_error.hpp>
#include <boost/thread/futures/future_error_code.hpp>
#include <boost/thread/futures/future_status.hpp>
#include <boost/thread/futures/is_future_type.hpp>
#include <boost/thread/futures/launch.hpp>
#include <boost/thread/futures/wait_for_all.hpp>
#include <boost/thread/futures/wait_for_any.hpp>
#include <boost/thread/lock_algorithms.hpp>
#include <boost/thread/lock_types.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/thread/thread_only.hpp>
#include <boost/thread/thread_time.hpp>
#include <boost/thread/executor.hpp>
#include <boost/thread/executors/generic_executor_ref.hpp>
#if defined BOOST_THREAD_FUTURE_USES_OPTIONAL
#include <boost/optional.hpp>
#else
#include <boost/thread/csbl/memory/unique_ptr.hpp>
#endif
#include <boost/assert.hpp>
#include <boost/bind.hpp>
#ifdef BOOST_THREAD_USES_CHRONO
#include <boost/chrono/system_clocks.hpp>
#endif
#include <boost/core/enable_if.hpp>
#include <boost/core/ref.hpp>
#include <boost/enable_shared_from_this.hpp>
#include <boost/exception_ptr.hpp>
#include <boost/function.hpp>
#include <boost/next_prior.hpp>
#include <boost/scoped_array.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/smart_ptr/make_shared.hpp>
#include <boost/throw_exception.hpp>
#include <boost/type_traits/conditional.hpp>
#include <boost/type_traits/decay.hpp>
#include <boost/type_traits/is_copy_constructible.hpp>
#include <boost/type_traits/is_fundamental.hpp>
#include <boost/type_traits/is_void.hpp>
#include <boost/utility/result_of.hpp>
#if defined BOOST_THREAD_PROVIDES_FUTURE_CTOR_ALLOCATORS
#include <boost/thread/detail/memory.hpp>
#include <boost/container/scoped_allocator.hpp>
#if ! defined BOOST_NO_CXX11_ALLOCATOR
#include <memory>
#endif
#endif
#if defined BOOST_THREAD_PROVIDES_FUTURE_WHEN_ALL_WHEN_ANY
#include <boost/thread/csbl/tuple.hpp>
#include <boost/thread/csbl/vector.hpp>
#endif
#include <algorithm>
#include <list>
#include <vector>
#include <utility>
#if defined BOOST_THREAD_PROVIDES_FUTURE
#define BOOST_THREAD_FUTURE future
#else
#define BOOST_THREAD_FUTURE unique_future
#endif
namespace boost
{
template <class T>
shared_ptr<T> static_shared_from_this(T* that)
{
return static_pointer_cast<T>(that->shared_from_this());
}
template <class T>
shared_ptr<T const> static_shared_from_this(T const* that)
{
return static_pointer_cast<T const>(that->shared_from_this());
}
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
#else
namespace executors {
class executor;
}
#endif
typedef shared_ptr<executor> executor_ptr_type;
namespace detail
{
struct relocker
{
boost::unique_lock<boost::mutex>& lock_;
relocker(boost::unique_lock<boost::mutex>& lk):
lock_(lk)
{
lock_.unlock();
}
~relocker()
{
if (! lock_.owns_lock()) {
lock_.lock();
}
}
void lock() {
if (! lock_.owns_lock()) {
lock_.lock();
}
}
private:
relocker& operator=(relocker const&);
};
struct shared_state_base : enable_shared_from_this<shared_state_base>
{
typedef std::list<boost::condition_variable_any*> waiter_list;
typedef waiter_list::iterator notify_when_ready_handle;
// This type should be only included conditionally if interruptions are allowed, but is included to maintain the same layout.
typedef shared_ptr<shared_state_base> continuation_ptr_type;
typedef std::vector<continuation_ptr_type> continuations_type;
boost::exception_ptr exception;
bool done;
bool is_valid_;
bool is_deferred_;
bool is_constructed;
launch policy_;
mutable boost::mutex mutex;
boost::condition_variable waiters;
waiter_list external_waiters;
boost::function<void()> callback;
// This declaration should be only included conditionally, but is included to maintain the same layout.
continuations_type continuations;
executor_ptr_type ex;
// This declaration should be only included conditionally, but is included to maintain the same layout.
virtual void launch_continuation()
{
}
shared_state_base():
done(false),
is_valid_(true),
is_deferred_(false),
is_constructed(false),
policy_(launch::none),
continuations(),
ex()
{}
shared_state_base(exceptional_ptr const& ex_):
exception(ex_.ptr_),
done(true),
is_valid_(true),
is_deferred_(false),
is_constructed(false),
policy_(launch::none),
continuations(),
ex()
{}
virtual ~shared_state_base()
{
}
executor_ptr_type get_executor()
{
return ex;
}
void set_executor_policy(executor_ptr_type aex)
{
set_executor();
ex = aex;
}
void set_executor_policy(executor_ptr_type aex, boost::lock_guard<boost::mutex>&)
{
set_executor();
ex = aex;
}
void set_executor_policy(executor_ptr_type aex, boost::unique_lock<boost::mutex>&)
{
set_executor();
ex = aex;
}
bool valid(boost::unique_lock<boost::mutex>&) { return is_valid_; }
bool valid() {
boost::unique_lock<boost::mutex> lk(this->mutex);
return valid(lk);
}
void invalidate(boost::unique_lock<boost::mutex>&) { is_valid_ = false; }
void invalidate() {
boost::unique_lock<boost::mutex> lk(this->mutex);
invalidate(lk);
}
void validate(boost::unique_lock<boost::mutex>&) { is_valid_ = true; }
void validate() {
boost::unique_lock<boost::mutex> lk(this->mutex);
validate(lk);
}
void set_deferred()
{
is_deferred_ = true;
policy_ = launch::deferred;
}
void set_async()
{
is_deferred_ = false;
policy_ = launch::async;
}
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
void set_executor()
{
is_deferred_ = false;
policy_ = launch::executor;
}
#else
void set_executor()
{
}
#endif
notify_when_ready_handle notify_when_ready(boost::condition_variable_any& cv)
{
boost::unique_lock<boost::mutex> lock(this->mutex);
do_callback(lock);
return external_waiters.insert(external_waiters.end(),&cv);
}
void unnotify_when_ready(notify_when_ready_handle it)
{
boost::lock_guard<boost::mutex> lock(this->mutex);
external_waiters.erase(it);
}
#if defined BOOST_THREAD_PROVIDES_FUTURE_CONTINUATION
void do_continuation(boost::unique_lock<boost::mutex>& lock)
{
if (! continuations.empty()) {
continuations_type the_continuations = continuations;
continuations.clear();
relocker rlk(lock);
for (continuations_type::iterator it = the_continuations.begin(); it != the_continuations.end(); ++it) {
(*it)->launch_continuation();
}
}
}
#else
void do_continuation(boost::unique_lock<boost::mutex>&)
{
}
#endif
#if defined BOOST_THREAD_PROVIDES_FUTURE_CONTINUATION
virtual void set_continuation_ptr(continuation_ptr_type continuation, boost::unique_lock<boost::mutex>& lock)
{
continuations.push_back(continuation);
if (done) {
do_continuation(lock);
}
}
#endif
void mark_finished_internal(boost::unique_lock<boost::mutex>& lock)
{
done=true;
waiters.notify_all();
for(waiter_list::const_iterator it=external_waiters.begin(),
end=external_waiters.end();it!=end;++it)
{
(*it)->notify_all();
}
do_continuation(lock);
}
void make_ready()
{
boost::unique_lock<boost::mutex> lock(this->mutex);
mark_finished_internal(lock);
}
void do_callback(boost::unique_lock<boost::mutex>& lock)
{
if(callback && !done)
{
boost::function<void()> local_callback=callback;
relocker relock(lock);
local_callback();
}
}
virtual bool run_if_is_deferred()
{
boost::unique_lock<boost::mutex> lk(this->mutex);
if (is_deferred_)
{
is_deferred_=false;
execute(lk);
return true;
}
else
return false;
}
virtual bool run_if_is_deferred_or_ready()
{
boost::unique_lock<boost::mutex> lk(this->mutex);
if (is_deferred_)
{
is_deferred_=false;
execute(lk);
return true;
}
else
return done;
}
void wait_internal(boost::unique_lock<boost::mutex> &lk, bool rethrow=true)
{
do_callback(lk);
if (is_deferred_)
{
is_deferred_=false;
execute(lk);
}
while(!done)
{
waiters.wait(lk);
}
if(rethrow && exception)
{
boost::rethrow_exception(exception);
}
}
virtual void wait(boost::unique_lock<boost::mutex>& lock, bool rethrow=true)
{
wait_internal(lock, rethrow);
}
void wait(bool rethrow=true)
{
boost::unique_lock<boost::mutex> lock(this->mutex);
wait(lock, rethrow);
}
#if defined BOOST_THREAD_USES_DATETIME
bool timed_wait_until(boost::system_time const& target_time)
{
boost::unique_lock<boost::mutex> lock(this->mutex);
if (is_deferred_)
return false;
do_callback(lock);
while(!done)
{
bool const success=waiters.timed_wait(lock,target_time);
if(!success && !done)
{
return false;
}
}
return true;
}
#endif
#ifdef BOOST_THREAD_USES_CHRONO
template <class Clock, class Duration>
future_status
wait_until(const chrono::time_point<Clock, Duration>& abs_time)
{
boost::unique_lock<boost::mutex> lock(this->mutex);
if (is_deferred_)
return future_status::deferred;
do_callback(lock);
while(!done)
{
cv_status const st=waiters.wait_until(lock,abs_time);
if(st==cv_status::timeout && !done)
{
return future_status::timeout;
}
}
return future_status::ready;
}
#endif
void mark_exceptional_finish_internal(boost::exception_ptr const& e, boost::unique_lock<boost::mutex>& lock)
{
exception=e;
mark_finished_internal(lock);
}
void mark_exceptional_finish()
{
boost::unique_lock<boost::mutex> lock(this->mutex);
mark_exceptional_finish_internal(boost::current_exception(), lock);
}
void set_exception_at_thread_exit(exception_ptr e)
{
unique_lock<boost::mutex> lk(this->mutex);
if (has_value(lk))
{
throw_exception(promise_already_satisfied());
}
exception=e;
this->is_constructed = true;
detail::make_ready_at_thread_exit(shared_from_this());
}
bool has_value() const
{
boost::lock_guard<boost::mutex> lock(this->mutex);
return done && ! exception;
}
bool has_value(unique_lock<boost::mutex>& ) const
{
return done && ! exception;
}
bool has_exception() const
{
boost::lock_guard<boost::mutex> lock(this->mutex);
return done && exception;
}
launch launch_policy(boost::unique_lock<boost::mutex>&) const
{
return policy_;
}
future_state::state get_state(boost::unique_lock<boost::mutex>&) const
{
if(!done)
{
return future_state::waiting;
}
else
{
return future_state::ready;
}
}
future_state::state get_state() const
{
boost::lock_guard<boost::mutex> guard(this->mutex);
if(!done)
{
return future_state::waiting;
}
else
{
return future_state::ready;
}
}
exception_ptr get_exception_ptr()
{
boost::unique_lock<boost::mutex> lock(this->mutex);
wait_internal(lock, false);
return exception;
}
template<typename F,typename U>
void set_wait_callback(F f,U* u)
{
boost::lock_guard<boost::mutex> lock(this->mutex);
callback=boost::bind(f,boost::ref(*u));
}
virtual void execute(boost::unique_lock<boost::mutex>&) {}
private:
shared_state_base(shared_state_base const&);
shared_state_base& operator=(shared_state_base const&);
};
// Used to create stand-alone futures
template<typename T>
struct shared_state:
detail::shared_state_base
{
#if defined BOOST_THREAD_FUTURE_USES_OPTIONAL
typedef boost::optional<T> storage_type;
#else
typedef boost::csbl::unique_ptr<T> storage_type;
#endif
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
typedef T const& source_reference_type;
typedef BOOST_THREAD_RV_REF(T) rvalue_source_type;
typedef T move_dest_type;
#elif defined BOOST_THREAD_USES_MOVE
typedef typename conditional<boost::is_fundamental<T>::value,T,T const&>::type source_reference_type;
typedef BOOST_THREAD_RV_REF(T) rvalue_source_type;
typedef T move_dest_type;
#else
typedef T& source_reference_type;
typedef typename conditional<boost::thread_detail::is_convertible<T&,BOOST_THREAD_RV_REF(T) >::value, BOOST_THREAD_RV_REF(T),T const&>::type rvalue_source_type;
typedef typename conditional<boost::thread_detail::is_convertible<T&,BOOST_THREAD_RV_REF(T) >::value, BOOST_THREAD_RV_REF(T),T>::type move_dest_type;
#endif
typedef const T& shared_future_get_result_type;
storage_type result;
shared_state():
result()
{}
shared_state(exceptional_ptr const& ex):
detail::shared_state_base(ex), result()
{}
~shared_state()
{
}
void mark_finished_with_result_internal(source_reference_type result_, boost::unique_lock<boost::mutex>& lock)
{
#if defined BOOST_THREAD_FUTURE_USES_OPTIONAL
result = result_;
#else
result.reset(new T(result_));
#endif
this->mark_finished_internal(lock);
}
void mark_finished_with_result_internal(rvalue_source_type result_, boost::unique_lock<boost::mutex>& lock)
{
#if defined BOOST_THREAD_FUTURE_USES_OPTIONAL
result = boost::move(result_);
#elif ! defined BOOST_NO_CXX11_RVALUE_REFERENCES
result.reset(new T(boost::move(result_)));
#else
result.reset(new T(static_cast<rvalue_source_type>(result_)));
#endif
this->mark_finished_internal(lock);
}
#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template <class ...Args>
void mark_finished_with_result_internal(boost::unique_lock<boost::mutex>& lock, BOOST_THREAD_FWD_REF(Args)... args)
{
#if defined BOOST_THREAD_FUTURE_USES_OPTIONAL
result.emplace(boost::forward<Args>(args)...);
#else
result.reset(new T(boost::forward<Args>(args)...));
#endif
this->mark_finished_internal(lock);
}
#endif
void mark_finished_with_result(source_reference_type result_)
{
boost::unique_lock<boost::mutex> lock(this->mutex);
this->mark_finished_with_result_internal(result_, lock);
}
void mark_finished_with_result(rvalue_source_type result_)
{
boost::unique_lock<boost::mutex> lock(this->mutex);
#if ! defined BOOST_NO_CXX11_RVALUE_REFERENCES
mark_finished_with_result_internal(boost::move(result_), lock);
#else
mark_finished_with_result_internal(static_cast<rvalue_source_type>(result_), lock);
#endif
}
storage_type& get_storage(boost::unique_lock<boost::mutex>& lk)
{
wait_internal(lk);
return result;
}
virtual move_dest_type get(boost::unique_lock<boost::mutex>& lk)
{
return boost::move(*get_storage(lk));
}
move_dest_type get()
{
boost::unique_lock<boost::mutex> lk(this->mutex);
return this->get(lk);
}
virtual shared_future_get_result_type get_sh(boost::unique_lock<boost::mutex>& lk)
{
return *get_storage(lk);
}
shared_future_get_result_type get_sh()
{
boost::unique_lock<boost::mutex> lk(this->mutex);
return this->get_sh(lk);
}
void set_value_at_thread_exit(source_reference_type result_)
{
unique_lock<boost::mutex> lk(this->mutex);
if (this->has_value(lk))
{
throw_exception(promise_already_satisfied());
}
#if defined BOOST_THREAD_FUTURE_USES_OPTIONAL
result = result_;
#else
result.reset(new T(result_));
#endif
this->is_constructed = true;
detail::make_ready_at_thread_exit(shared_from_this());
}
void set_value_at_thread_exit(rvalue_source_type result_)
{
unique_lock<boost::mutex> lk(this->mutex);
if (this->has_value(lk))
throw_exception(promise_already_satisfied());
#if ! defined BOOST_NO_CXX11_RVALUE_REFERENCES
#if defined BOOST_THREAD_FUTURE_USES_OPTIONAL
result = boost::move(result_);
#else
result.reset(new T(boost::move(result_)));
#endif
#else
#if defined BOOST_THREAD_FUTURE_USES_OPTIONAL
result = boost::move(result_);
#else
result.reset(new T(static_cast<rvalue_source_type>(result_)));
#endif
#endif
this->is_constructed = true;
detail::make_ready_at_thread_exit(shared_from_this());
}
private:
shared_state(shared_state const&);
shared_state& operator=(shared_state const&);
};
template<typename T>
struct shared_state<T&>:
detail::shared_state_base
{
typedef T* storage_type;
typedef T& source_reference_type;
typedef T& move_dest_type;
typedef T& shared_future_get_result_type;
T* result;
shared_state():
result(0)
{}
shared_state(exceptional_ptr const& ex):
detail::shared_state_base(ex), result(0)
{}
~shared_state()
{
}
void mark_finished_with_result_internal(source_reference_type result_, boost::unique_lock<boost::mutex>& lock)
{
result= &result_;
mark_finished_internal(lock);
}
void mark_finished_with_result(source_reference_type result_)
{
boost::unique_lock<boost::mutex> lock(this->mutex);
mark_finished_with_result_internal(result_, lock);
}
virtual T& get(boost::unique_lock<boost::mutex>& lock)
{
wait_internal(lock);
return *result;
}
T& get()
{
boost::unique_lock<boost::mutex> lk(this->mutex);
return get(lk);
}
virtual T& get_sh(boost::unique_lock<boost::mutex>& lock)
{
wait_internal(lock);
return *result;
}
T& get_sh()
{
boost::unique_lock<boost::mutex> lock(this->mutex);
return get_sh(lock);
}
void set_value_at_thread_exit(T& result_)
{
unique_lock<boost::mutex> lk(this->mutex);
if (this->has_value(lk))
throw_exception(promise_already_satisfied());
result= &result_;
this->is_constructed = true;
detail::make_ready_at_thread_exit(shared_from_this());
}
private:
shared_state(shared_state const&);
shared_state& operator=(shared_state const&);
};
template<>
struct shared_state<void>:
detail::shared_state_base
{
typedef void shared_future_get_result_type;
typedef void move_dest_type;
shared_state()
{}
shared_state(exceptional_ptr const& ex):
detail::shared_state_base(ex)
{}
void mark_finished_with_result_internal(boost::unique_lock<boost::mutex>& lock)
{
mark_finished_internal(lock);
}
void mark_finished_with_result()
{
boost::unique_lock<boost::mutex> lock(this->mutex);
mark_finished_with_result_internal(lock);
}
virtual void get(boost::unique_lock<boost::mutex>& lock)
{
this->wait_internal(lock);
}
void get()
{
boost::unique_lock<boost::mutex> lock(this->mutex);
this->get(lock);
}
virtual void get_sh(boost::unique_lock<boost::mutex>& lock)
{
this->wait_internal(lock);
}
void get_sh()
{
boost::unique_lock<boost::mutex> lock(this->mutex);
this->get_sh(lock);
}
void set_value_at_thread_exit()
{
unique_lock<boost::mutex> lk(this->mutex);
if (this->has_value(lk))
{
throw_exception(promise_already_satisfied());
}
this->is_constructed = true;
detail::make_ready_at_thread_exit(shared_from_this());
}
private:
shared_state(shared_state const&);
shared_state& operator=(shared_state const&);
};
/////////////////////////
/// future_async_shared_state_base
/////////////////////////
template<typename Rp>
struct future_async_shared_state_base: shared_state<Rp>
{
typedef shared_state<Rp> base_type;
protected:
#ifdef BOOST_THREAD_FUTURE_BLOCKING
boost::thread thr_;
void join()
{
if (this_thread::get_id() == thr_.get_id())
{
thr_.detach();
return;
}
if (thr_.joinable()) thr_.join();
}
#endif
public:
future_async_shared_state_base()
{
this->set_async();
}
~future_async_shared_state_base()
{
#ifdef BOOST_THREAD_FUTURE_BLOCKING
join();
#elif defined BOOST_THREAD_ASYNC_FUTURE_WAITS
unique_lock<boost::mutex> lk(this->mutex);
while(!this->done)
{
this->waiters.wait(lk);
}
#endif
}
virtual void wait(boost::unique_lock<boost::mutex>& lk, bool rethrow)
{
#ifdef BOOST_THREAD_FUTURE_BLOCKING
{
relocker rlk(lk);
join();
}
#endif
this->base_type::wait(lk, rethrow);
}
};
/////////////////////////
/// future_async_shared_state
/////////////////////////
template<typename Rp, typename Fp>
struct future_async_shared_state: future_async_shared_state_base<Rp>
{
future_async_shared_state()
{
}
void init(BOOST_THREAD_FWD_REF(Fp) f)
{
#ifdef BOOST_THREAD_FUTURE_BLOCKING
this->thr_ = boost::thread(&future_async_shared_state::run, static_shared_from_this(this), boost::forward<Fp>(f));
#else
boost::thread(&future_async_shared_state::run, static_shared_from_this(this), boost::forward<Fp>(f)).detach();
#endif
}
static void run(shared_ptr<future_async_shared_state> that, BOOST_THREAD_FWD_REF(Fp) f)
{
try
{
that->mark_finished_with_result(f());
}
catch(...)
{
that->mark_exceptional_finish();
}
}
};
template<typename Fp>
struct future_async_shared_state<void, Fp>: public future_async_shared_state_base<void>
{
void init(BOOST_THREAD_FWD_REF(Fp) f)
{
#ifdef BOOST_THREAD_FUTURE_BLOCKING
this->thr_ = boost::thread(&future_async_shared_state::run, static_shared_from_this(this), boost::move(f));
#else
boost::thread(&future_async_shared_state::run, static_shared_from_this(this), boost::move(f)).detach();
#endif
}
static void run(shared_ptr<future_async_shared_state> that, BOOST_THREAD_FWD_REF(Fp) f)
{
try
{
f();
that->mark_finished_with_result();
}
catch(...)
{
that->mark_exceptional_finish();
}
}
};
template<typename Rp, typename Fp>
struct future_async_shared_state<Rp&, Fp>: future_async_shared_state_base<Rp&>
{
void init(BOOST_THREAD_FWD_REF(Fp) f)
{
#ifdef BOOST_THREAD_FUTURE_BLOCKING
this->thr_ = boost::thread(&future_async_shared_state::run, static_shared_from_this(this), boost::move(f));
#else
boost::thread(&future_async_shared_state::run, static_shared_from_this(this), boost::move(f)).detach();
#endif
}
static void run(shared_ptr<future_async_shared_state> that, BOOST_THREAD_FWD_REF(Fp) f)
{
try
{
that->mark_finished_with_result(f());
}
catch(...)
{
that->mark_exceptional_finish();
}
}
};
//////////////////////////
/// future_deferred_shared_state
//////////////////////////
template<typename Rp, typename Fp>
struct future_deferred_shared_state: shared_state<Rp>
{
typedef shared_state<Rp> base_type;
Fp func_;
public:
explicit future_deferred_shared_state(BOOST_THREAD_FWD_REF(Fp) f)
: func_(boost::move(f))
{
this->set_deferred();
}
virtual void execute(boost::unique_lock<boost::mutex>& lck) {
try
{
Fp local_fuct=boost::move(func_);
relocker relock(lck);
Rp res = local_fuct();
relock.lock();
this->mark_finished_with_result_internal(boost::move(res), lck);
}
catch (...)
{
this->mark_exceptional_finish_internal(current_exception(), lck);
}
}
};
template<typename Rp, typename Fp>
struct future_deferred_shared_state<Rp&,Fp>: shared_state<Rp&>
{
typedef shared_state<Rp&> base_type;
Fp func_;
public:
explicit future_deferred_shared_state(BOOST_THREAD_FWD_REF(Fp) f)
: func_(boost::move(f))
{
this->set_deferred();
}
virtual void execute(boost::unique_lock<boost::mutex>& lck) {
try
{
this->mark_finished_with_result_internal(func_(), lck);
}
catch (...)
{
this->mark_exceptional_finish_internal(current_exception(), lck);
}
}
};
template<typename Fp>
struct future_deferred_shared_state<void,Fp>: shared_state<void>
{
typedef shared_state<void> base_type;
Fp func_;
public:
explicit future_deferred_shared_state(BOOST_THREAD_FWD_REF(Fp) f)
: func_(boost::move(f))
{
this->set_deferred();
}
virtual void execute(boost::unique_lock<boost::mutex>& lck) {
try
{
Fp local_fuct=boost::move(func_);
relocker relock(lck);
local_fuct();
relock.lock();
this->mark_finished_with_result_internal(lck);
}
catch (...)
{
this->mark_exceptional_finish_internal(current_exception(), lck);
}
}
};
class future_waiter
{
public:
typedef std::vector<int>::size_type count_type;
private:
struct registered_waiter;
struct registered_waiter
{
boost::shared_ptr<detail::shared_state_base> future_;
detail::shared_state_base::notify_when_ready_handle handle;
count_type index;
registered_waiter(boost::shared_ptr<detail::shared_state_base> const& a_future,
detail::shared_state_base::notify_when_ready_handle handle_,
count_type index_):
future_(a_future),handle(handle_),index(index_)
{}
};
struct all_futures_lock
{
#ifdef _MANAGED
typedef std::ptrdiff_t count_type_portable;
#else
typedef count_type count_type_portable;
#endif
count_type_portable count;
boost::scoped_array<boost::unique_lock<boost::mutex> > locks;
all_futures_lock(std::vector<registered_waiter>& futures):
count(futures.size()),locks(new boost::unique_lock<boost::mutex>[count])
{
for(count_type_portable i=0;i<count;++i)
{
locks[i]=BOOST_THREAD_MAKE_RV_REF(boost::unique_lock<boost::mutex>(futures[i].future_->mutex));
}
}
void lock()
{
boost::lock(locks.get(),locks.get()+count);
}
void unlock()
{
for(count_type_portable i=0;i<count;++i)
{
locks[i].unlock();
}
}
};
boost::condition_variable_any cv;
std::vector<registered_waiter> futures_;
count_type future_count;
public:
future_waiter():
future_count(0)
{}
template<typename F>
void add(F& f)
{
if(f.future_)
{
registered_waiter waiter(f.future_,f.future_->notify_when_ready(cv),future_count);
try {
futures_.push_back(waiter);
} catch(...) {
f.future_->unnotify_when_ready(waiter.handle);
throw;
}
}
++future_count;
}
#ifndef BOOST_NO_CXX11_VARIADIC_TEMPLATES
template<typename F1, typename... Fs>
void add(F1& f1, Fs&... fs)
{
add(f1); add(fs...);
}
#endif
count_type wait()
{
all_futures_lock lk(futures_);
for(;;)
{
for(count_type i=0;i<futures_.size();++i)
{
if(futures_[i].future_->done)
{
return futures_[i].index;
}
}
cv.wait(lk);
}
}
~future_waiter()
{
for(count_type i=0;i<futures_.size();++i)
{
futures_[i].future_->unnotify_when_ready(futures_[i].handle);
}
}
};
}
template <typename R>
class BOOST_THREAD_FUTURE;
template <typename R>
class shared_future;
template<typename T>
struct is_future_type<BOOST_THREAD_FUTURE<T> > : true_type
{
};
template<typename T>
struct is_future_type<shared_future<T> > : true_type
{
};
// template<typename Iterator>
// typename boost::disable_if<is_future_type<Iterator>,Iterator>::type wait_for_any(Iterator begin,Iterator end)
// {
// if(begin==end)
// return end;
//
// detail::future_waiter waiter;
// for(Iterator current=begin;current!=end;++current)
// {
// waiter.add(*current);
// }
// return boost::next(begin,waiter.wait());
// }
#ifdef BOOST_NO_CXX11_VARIADIC_TEMPLATES
template<typename F1,typename F2>
typename boost::enable_if<is_future_type<F1>,typename detail::future_waiter::count_type>::type wait_for_any(F1& f1,F2& f2)
{
detail::future_waiter waiter;
waiter.add(f1);
waiter.add(f2);
return waiter.wait();
}
template<typename F1,typename F2,typename F3>
typename detail::future_waiter::count_type wait_for_any(F1& f1,F2& f2,F3& f3)
{
detail::future_waiter waiter;
waiter.add(f1);
waiter.add(f2);
waiter.add(f3);
return waiter.wait();
}
template<typename F1,typename F2,typename F3,typename F4>
typename detail::future_waiter::count_type wait_for_any(F1& f1,F2& f2,F3& f3,F4& f4)
{
detail::future_waiter waiter;
waiter.add(f1);
waiter.add(f2);
waiter.add(f3);
waiter.add(f4);
return waiter.wait();
}
template<typename F1,typename F2,typename F3,typename F4,typename F5>
typename detail::future_waiter::count_type wait_for_any(F1& f1,F2& f2,F3& f3,F4& f4,F5& f5)
{
detail::future_waiter waiter;
waiter.add(f1);
waiter.add(f2);
waiter.add(f3);
waiter.add(f4);
waiter.add(f5);
return waiter.wait();
}
#else
template<typename F1, typename... Fs>
typename boost::enable_if<is_future_type<F1>, typename detail::future_waiter::count_type>::type
wait_for_any(F1& f1, Fs&... fs)
{
detail::future_waiter waiter;
waiter.add(f1, fs...);
return waiter.wait();
}
#endif // !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template <typename R>
class promise;
template <typename R>
class packaged_task;
namespace detail
{
/// Common implementation for all the futures independently of the return type
class base_future
{
public:
};
/// Common implementation for future and shared_future.
template <typename R>
class basic_future : public base_future
{
protected:
public:
typedef boost::shared_ptr<detail::shared_state<R> > future_ptr;
typedef typename detail::shared_state<R>::move_dest_type move_dest_type;
static //BOOST_CONSTEXPR
future_ptr make_exceptional_future_ptr(exceptional_ptr const& ex) {
return future_ptr(new detail::shared_state<R>(ex));
}
future_ptr future_;
basic_future(future_ptr a_future):
future_(a_future)
{
}
public:
typedef future_state::state state;
BOOST_THREAD_MOVABLE_ONLY(basic_future)
basic_future(): future_() {}
//BOOST_CONSTEXPR
basic_future(exceptional_ptr const& ex)
: future_(make_exceptional_future_ptr(ex))
{
}
~basic_future() {
}
basic_future(BOOST_THREAD_RV_REF(basic_future) other) BOOST_NOEXCEPT:
future_(BOOST_THREAD_RV(other).future_)
{
BOOST_THREAD_RV(other).future_.reset();
}
basic_future& operator=(BOOST_THREAD_RV_REF(basic_future) other) BOOST_NOEXCEPT
{
future_=BOOST_THREAD_RV(other).future_;
BOOST_THREAD_RV(other).future_.reset();
return *this;
}
void swap(basic_future& that) BOOST_NOEXCEPT
{
future_.swap(that.future_);
}
// functions to check state, and wait for ready
state get_state(boost::unique_lock<boost::mutex>& lk) const
{
if(!future_)
{
return future_state::uninitialized;
}
return future_->get_state(lk);
}
state get_state() const
{
if(!future_)
{
return future_state::uninitialized;
}
return future_->get_state();
}
bool is_ready() const
{
return get_state()==future_state::ready;
}
bool is_ready(boost::unique_lock<boost::mutex>& lk) const
{
return get_state(lk)==future_state::ready;
}
bool has_exception() const
{
return future_ && future_->has_exception();
}
bool has_value() const
{
return future_ && future_->has_value();
}
launch launch_policy(boost::unique_lock<boost::mutex>& lk) const
{
if ( future_ ) return future_->launch_policy(lk);
else return launch(launch::none);
}
launch launch_policy() const
{
if ( future_ ) {
boost::unique_lock<boost::mutex> lk(this->future_->mutex);
return future_->launch_policy(lk);
}
else return launch(launch::none);
}
exception_ptr get_exception_ptr()
{
return future_
? future_->get_exception_ptr()
: exception_ptr();
}
bool valid() const BOOST_NOEXCEPT
{
return future_ != 0 && future_->valid();
}
void wait() const
{
if(!future_)
{
boost::throw_exception(future_uninitialized());
}
future_->wait(false);
}
typedef detail::shared_state_base::notify_when_ready_handle notify_when_ready_handle;
boost::mutex& mutex() {
if(!future_)
{
boost::throw_exception(future_uninitialized());
}
return future_->mutex;
};
notify_when_ready_handle notify_when_ready(boost::condition_variable_any& cv)
{
if(!future_)
{
boost::throw_exception(future_uninitialized());
}
return future_->notify_when_ready(cv);
}
void unnotify_when_ready(notify_when_ready_handle h)
{
if(!future_)
{
boost::throw_exception(future_uninitialized());
}
return future_->unnotify_when_ready(h);
}
#if defined BOOST_THREAD_USES_DATETIME
template<typename Duration>
bool timed_wait(Duration const& rel_time) const
{
return timed_wait_until(boost::get_system_time()+rel_time);
}
bool timed_wait_until(boost::system_time const& abs_time) const
{
if(!future_)
{
boost::throw_exception(future_uninitialized());
}
return future_->timed_wait_until(abs_time);
}
#endif
#ifdef BOOST_THREAD_USES_CHRONO
template <class Rep, class Period>
future_status
wait_for(const chrono::duration<Rep, Period>& rel_time) const
{
return wait_until(chrono::steady_clock::now() + rel_time);
}
template <class Clock, class Duration>
future_status
wait_until(const chrono::time_point<Clock, Duration>& abs_time) const
{
if(!future_)
{
boost::throw_exception(future_uninitialized());
}
return future_->wait_until(abs_time);
}
#endif
};
} // detail
BOOST_THREAD_DCL_MOVABLE_BEG(R) detail::basic_future<R> BOOST_THREAD_DCL_MOVABLE_END
namespace detail
{
#if (!defined _MSC_VER || _MSC_VER >= 1400) // _MSC_VER == 1400 on MSVC 2005
template <class Rp, class Fp>
BOOST_THREAD_FUTURE<Rp>
make_future_async_shared_state(BOOST_THREAD_FWD_REF(Fp) f);
template <class Rp, class Fp>
BOOST_THREAD_FUTURE<Rp>
make_future_deferred_shared_state(BOOST_THREAD_FWD_REF(Fp) f);
#endif // #if (!defined _MSC_VER || _MSC_VER >= 1400)
#if defined BOOST_THREAD_PROVIDES_FUTURE_CONTINUATION
template<typename F, typename Rp, typename Fp>
struct future_deferred_continuation_shared_state;
template<typename F, typename Rp, typename Fp>
struct future_async_continuation_shared_state;
template <class F, class Rp, class Fp>
BOOST_THREAD_FUTURE<Rp>
make_future_async_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c);
template <class F, class Rp, class Fp>
BOOST_THREAD_FUTURE<Rp>
make_future_sync_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c);
template <class F, class Rp, class Fp>
BOOST_THREAD_FUTURE<Rp>
make_future_deferred_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c);
template<typename F, typename Rp, typename Fp>
BOOST_THREAD_FUTURE<Rp>
make_shared_future_deferred_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, F f, BOOST_THREAD_FWD_REF(Fp) c);
template<typename F, typename Rp, typename Fp>
BOOST_THREAD_FUTURE<Rp>
make_shared_future_async_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, F f, BOOST_THREAD_FWD_REF(Fp) c);
template<typename F, typename Rp, typename Fp>
BOOST_THREAD_FUTURE<Rp>
make_shared_future_sync_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, F f, BOOST_THREAD_FWD_REF(Fp) c);
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
template<typename Ex, typename F, typename Rp, typename Fp>
BOOST_THREAD_FUTURE<Rp>
make_future_executor_continuation_shared_state(Ex& ex, boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c);
template<typename Ex, typename F, typename Rp, typename Fp>
BOOST_THREAD_FUTURE<Rp>
make_shared_future_executor_continuation_shared_state(Ex& ex, boost::unique_lock<boost::mutex> &lock, F f, BOOST_THREAD_FWD_REF(Fp) c);
template <class Rp, class Fp, class Executor>
BOOST_THREAD_FUTURE<Rp>
make_future_executor_shared_state(Executor& ex, BOOST_THREAD_FWD_REF(Fp) f);
#endif
#endif
#if defined BOOST_THREAD_PROVIDES_FUTURE_UNWRAP
template<typename F, typename Rp>
struct future_unwrap_shared_state;
template <class F, class Rp>
inline BOOST_THREAD_FUTURE<Rp>
make_future_unwrap_shared_state(boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f);
#endif
}
#if defined(BOOST_THREAD_PROVIDES_FUTURE_WHEN_ALL_WHEN_ANY)
template< typename InputIterator>
typename boost::disable_if<is_future_type<InputIterator>,
BOOST_THREAD_FUTURE<csbl::vector<typename InputIterator::value_type> >
>::type
when_all(InputIterator first, InputIterator last);
inline BOOST_THREAD_FUTURE<csbl::tuple<> > when_all();
#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template< typename T0, typename ...T>
BOOST_THREAD_FUTURE<csbl::tuple<typename decay<T0>::type, typename decay<T>::type...> >
when_all(BOOST_THREAD_FWD_REF(T0) f, BOOST_THREAD_FWD_REF(T) ... futures);
#endif
template< typename InputIterator>
typename boost::disable_if<is_future_type<InputIterator>,
BOOST_THREAD_FUTURE<csbl::vector<typename InputIterator::value_type> >
>::type
when_any(InputIterator first, InputIterator last);
inline BOOST_THREAD_FUTURE<csbl::tuple<> > when_any();
#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template< typename T0, typename ...T>
BOOST_THREAD_FUTURE<csbl::tuple<typename decay<T0>::type, typename decay<T>::type...> >
when_any(BOOST_THREAD_FWD_REF(T0) f, BOOST_THREAD_FWD_REF(T) ... futures);
#endif
#endif // BOOST_THREAD_PROVIDES_FUTURE_WHEN_ALL_WHEN_ANY
template <typename R>
class BOOST_THREAD_FUTURE : public detail::basic_future<R>
{
private:
typedef detail::basic_future<R> base_type;
typedef typename base_type::future_ptr future_ptr;
friend class shared_future<R>;
friend class promise<R>;
#if defined BOOST_THREAD_PROVIDES_FUTURE_CONTINUATION
template <typename, typename, typename>
friend struct detail::future_async_continuation_shared_state;
template <typename, typename, typename>
friend struct detail::future_deferred_continuation_shared_state;
template <class F, class Rp, class Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_async_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c);
template <class F, class Rp, class Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_sync_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c);
template <class F, class Rp, class Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_deferred_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c);
template<typename F, typename Rp, typename Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_shared_future_deferred_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, F f, BOOST_THREAD_FWD_REF(Fp) c);
template<typename F, typename Rp, typename Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_shared_future_async_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, F f, BOOST_THREAD_FWD_REF(Fp) c);
template<typename F, typename Rp, typename Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_shared_future_sync_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, F f, BOOST_THREAD_FWD_REF(Fp) c);
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
template<typename Ex, typename F, typename Rp, typename Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_executor_continuation_shared_state(Ex& ex, boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c);
template<typename Ex, typename F, typename Rp, typename Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_shared_future_executor_continuation_shared_state(Ex& ex, boost::unique_lock<boost::mutex> &lock, F f, BOOST_THREAD_FWD_REF(Fp) c);
template <class Rp, class Fp, class Executor>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_executor_shared_state(Executor& ex, BOOST_THREAD_FWD_REF(Fp) f);
#endif
#endif
#if defined BOOST_THREAD_PROVIDES_FUTURE_UNWRAP
template<typename F, typename Rp>
friend struct detail::future_unwrap_shared_state;
template <class F, class Rp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_unwrap_shared_state(boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f);
#endif
#if defined(BOOST_THREAD_PROVIDES_FUTURE_WHEN_ALL_WHEN_ANY)
template< typename InputIterator>
friend typename boost::disable_if<is_future_type<InputIterator>,
BOOST_THREAD_FUTURE<csbl::vector<typename InputIterator::value_type> >
>::type
when_all(InputIterator first, InputIterator last);
//friend inline BOOST_THREAD_FUTURE<csbl::tuple<> > when_all();
#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template< typename T0, typename ...T>
friend BOOST_THREAD_FUTURE<csbl::tuple<typename decay<T0>::type, typename decay<T>::type...> >
when_all(BOOST_THREAD_FWD_REF(T0) f, BOOST_THREAD_FWD_REF(T) ... futures);
#endif
template< typename InputIterator>
friend typename boost::disable_if<is_future_type<InputIterator>,
BOOST_THREAD_FUTURE<csbl::vector<typename InputIterator::value_type> >
>::type
when_any(InputIterator first, InputIterator last);
//friend inline BOOST_THREAD_FUTURE<csbl::tuple<> > when_any();
#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template< typename T0, typename ...T>
friend BOOST_THREAD_FUTURE<csbl::tuple<typename decay<T0>::type, typename decay<T>::type...> >
when_any(BOOST_THREAD_FWD_REF(T0) f, BOOST_THREAD_FWD_REF(T) ... futures);
#endif
#endif // BOOST_THREAD_PROVIDES_FUTURE_WHEN_ALL_WHEN_ANY
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
template <class> friend class packaged_task; // todo check if this works in windows
#else
friend class packaged_task<R>;
#endif
friend class detail::future_waiter;
template <class Rp, class Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_async_shared_state(BOOST_THREAD_FWD_REF(Fp) f);
template <class Rp, class Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_deferred_shared_state(BOOST_THREAD_FWD_REF(Fp) f);
typedef typename base_type::move_dest_type move_dest_type;
BOOST_THREAD_FUTURE(future_ptr a_future):
base_type(a_future)
{
}
public:
BOOST_THREAD_MOVABLE_ONLY(BOOST_THREAD_FUTURE)
typedef future_state::state state;
typedef R value_type; // EXTENSION
BOOST_CONSTEXPR BOOST_THREAD_FUTURE() {}
//BOOST_CONSTEXPR
BOOST_THREAD_FUTURE(exceptional_ptr const& ex):
base_type(ex) {}
~BOOST_THREAD_FUTURE() {
}
BOOST_THREAD_FUTURE(BOOST_THREAD_RV_REF(BOOST_THREAD_FUTURE) other) BOOST_NOEXCEPT:
base_type(boost::move(static_cast<base_type&>(BOOST_THREAD_RV(other))))
{
}
inline explicit BOOST_THREAD_FUTURE(BOOST_THREAD_RV_REF(BOOST_THREAD_FUTURE<BOOST_THREAD_FUTURE<R> >) other); // EXTENSION
explicit BOOST_THREAD_FUTURE(BOOST_THREAD_RV_REF(shared_future<R>) other) :
base_type(boost::move(static_cast<base_type&>(BOOST_THREAD_RV(other))))
{}
BOOST_THREAD_FUTURE& operator=(BOOST_THREAD_RV_REF(BOOST_THREAD_FUTURE) other) BOOST_NOEXCEPT
{
this->base_type::operator=(boost::move(static_cast<base_type&>(BOOST_THREAD_RV(other))));
return *this;
}
shared_future<R> share()
{
return shared_future<R>(::boost::move(*this));
}
void swap(BOOST_THREAD_FUTURE& other)
{
static_cast<base_type*>(this)->swap(other);
}
// todo this function must be private and friendship provided to the internal users.
void set_async()
{
this->future_->set_async();
}
// todo this function must be private and friendship provided to the internal users.
void set_deferred()
{
this->future_->set_deferred();
}
bool run_if_is_deferred() {
return this->future_->run_if_is_deferred();
}
bool run_if_is_deferred_or_ready() {
return this->future_->run_if_is_deferred_or_ready();
}
// retrieving the value
move_dest_type get()
{
if (this->future_ == 0)
{
boost::throw_exception(future_uninitialized());
}
unique_lock<boost::mutex> lk(this->future_->mutex);
if (! this->future_->valid(lk))
{
boost::throw_exception(future_uninitialized());
}
#ifdef BOOST_THREAD_PROVIDES_FUTURE_INVALID_AFTER_GET
this->future_->invalidate(lk);
#endif
return this->future_->get(lk);
}
template <typename R2>
typename boost::disable_if< is_void<R2>, move_dest_type>::type
get_or(BOOST_THREAD_RV_REF(R2) v)
{
if (this->future_ == 0)
{
boost::throw_exception(future_uninitialized());
}
unique_lock<boost::mutex> lk(this->future_->mutex);
if (! this->future_->valid(lk))
{
boost::throw_exception(future_uninitialized());
}
this->future_->wait(lk, false);
#ifdef BOOST_THREAD_PROVIDES_FUTURE_INVALID_AFTER_GET
this->future_->invalidate(lk);
#endif
if (this->future_->has_value(lk)) {
return this->future_->get(lk);
}
else {
return boost::move(v);
}
}
template <typename R2>
typename boost::disable_if< is_void<R2>, move_dest_type>::type
get_or(R2 const& v) // EXTENSION
{
if (this->future_ == 0)
{
boost::throw_exception(future_uninitialized());
}
unique_lock<boost::mutex> lk(this->future_->mutex);
if (! this->future_->valid(lk))
{
boost::throw_exception(future_uninitialized());
}
this->future_->wait(lk, false);
#ifdef BOOST_THREAD_PROVIDES_FUTURE_INVALID_AFTER_GET
this->future_->invalidate(lk);
#endif
if (this->future_->has_value(lk)) {
return this->future_->get(lk);
}
else {
return v;
}
}
#if defined BOOST_THREAD_PROVIDES_FUTURE_CONTINUATION
template<typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(BOOST_THREAD_FUTURE)>::type>
then(BOOST_THREAD_FWD_REF(F) func); // EXTENSION
template<typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(BOOST_THREAD_FUTURE)>::type>
then(launch policy, BOOST_THREAD_FWD_REF(F) func); // EXTENSION
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
template<typename Ex, typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(BOOST_THREAD_FUTURE)>::type>
then(Ex& ex, BOOST_THREAD_FWD_REF(F) func); // EXTENSION
#endif
template <typename R2>
inline typename boost::disable_if< is_void<R2>, BOOST_THREAD_FUTURE<R> >::type
fallback_to(BOOST_THREAD_RV_REF(R2) v); // EXTENSION
template <typename R2>
inline typename boost::disable_if< is_void<R2>, BOOST_THREAD_FUTURE<R> >::type
fallback_to(R2 const& v); // EXTENSION
#endif
};
BOOST_THREAD_DCL_MOVABLE_BEG(T) BOOST_THREAD_FUTURE<T> BOOST_THREAD_DCL_MOVABLE_END
template <typename R2>
class BOOST_THREAD_FUTURE<BOOST_THREAD_FUTURE<R2> > : public detail::basic_future<BOOST_THREAD_FUTURE<R2> >
{
typedef BOOST_THREAD_FUTURE<R2> R;
private:
typedef detail::basic_future<R> base_type;
typedef typename base_type::future_ptr future_ptr;
friend class shared_future<R>;
friend class promise<R>;
#if defined BOOST_THREAD_PROVIDES_FUTURE_CONTINUATION
template <typename, typename, typename>
friend struct detail::future_async_continuation_shared_state;
template <typename, typename, typename>
friend struct detail::future_deferred_continuation_shared_state;
template <class F, class Rp, class Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_async_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c);
template <class F, class Rp, class Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_sync_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c);
template <class F, class Rp, class Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_deferred_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c);
template<typename F, typename Rp, typename Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_shared_future_deferred_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, F f, BOOST_THREAD_FWD_REF(Fp) c);
template<typename F, typename Rp, typename Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_shared_future_async_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, F f, BOOST_THREAD_FWD_REF(Fp) c);
template<typename F, typename Rp, typename Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_shared_future_sync_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, F f, BOOST_THREAD_FWD_REF(Fp) c);
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
template<typename Ex, typename F, typename Rp, typename Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_executor_continuation_shared_state(Ex& ex, boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c);
template<typename Ex, typename F, typename Rp, typename Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_shared_future_executor_continuation_shared_state(Ex& ex, boost::unique_lock<boost::mutex> &lock, F f, BOOST_THREAD_FWD_REF(Fp) c);
template <class Rp, class Fp, class Executor>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_executor_shared_state(Executor& ex, BOOST_THREAD_FWD_REF(Fp) f);
#endif
#endif
#if defined BOOST_THREAD_PROVIDES_FUTURE_UNWRAP
template<typename F, typename Rp>
friend struct detail::future_unwrap_shared_state;
template <class F, class Rp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_unwrap_shared_state(boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f);
#endif
#if defined(BOOST_THREAD_PROVIDES_FUTURE_WHEN_ALL_WHEN_ANY)
template< typename InputIterator>
friend typename boost::disable_if<is_future_type<InputIterator>,
BOOST_THREAD_FUTURE<csbl::vector<typename InputIterator::value_type> >
>::type
when_all(InputIterator first, InputIterator last);
friend inline BOOST_THREAD_FUTURE<csbl::tuple<> > when_all();
#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template< typename T0, typename ...T>
friend BOOST_THREAD_FUTURE<csbl::tuple<typename decay<T0>::type, typename decay<T>::type...> >
when_all(BOOST_THREAD_FWD_REF(T0) f, BOOST_THREAD_FWD_REF(T) ... futures);
#endif
template< typename InputIterator>
friend typename boost::disable_if<is_future_type<InputIterator>,
BOOST_THREAD_FUTURE<csbl::vector<typename InputIterator::value_type> >
>::type
when_any(InputIterator first, InputIterator last);
friend inline BOOST_THREAD_FUTURE<csbl::tuple<> > when_any();
#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template< typename T0, typename ...T>
friend BOOST_THREAD_FUTURE<csbl::tuple<typename decay<T0>::type, typename decay<T>::type...> >
when_any(BOOST_THREAD_FWD_REF(T0) f, BOOST_THREAD_FWD_REF(T) ... futures);
#endif
#endif // BOOST_THREAD_PROVIDES_FUTURE_WHEN_ALL_WHEN_ANY
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
template <class> friend class packaged_task; // todo check if this works in windows
#else
friend class packaged_task<R>;
#endif
friend class detail::future_waiter;
template <class Rp, class Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_async_shared_state(BOOST_THREAD_FWD_REF(Fp) f);
template <class Rp, class Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_deferred_shared_state(BOOST_THREAD_FWD_REF(Fp) f);
typedef typename base_type::move_dest_type move_dest_type;
BOOST_THREAD_FUTURE(future_ptr a_future):
base_type(a_future)
{
}
public:
BOOST_THREAD_MOVABLE_ONLY(BOOST_THREAD_FUTURE)
typedef future_state::state state;
typedef R value_type; // EXTENSION
BOOST_CONSTEXPR BOOST_THREAD_FUTURE() {}
//BOOST_CONSTEXPR
BOOST_THREAD_FUTURE(exceptional_ptr const& ex):
base_type(ex) {}
~BOOST_THREAD_FUTURE() {
}
BOOST_THREAD_FUTURE(BOOST_THREAD_RV_REF(BOOST_THREAD_FUTURE) other) BOOST_NOEXCEPT:
base_type(boost::move(static_cast<base_type&>(BOOST_THREAD_RV(other))))
{
}
BOOST_THREAD_FUTURE& operator=(BOOST_THREAD_RV_REF(BOOST_THREAD_FUTURE) other) BOOST_NOEXCEPT
{
this->base_type::operator=(boost::move(static_cast<base_type&>(BOOST_THREAD_RV(other))));
return *this;
}
shared_future<R> share()
{
return shared_future<R>(::boost::move(*this));
}
void swap(BOOST_THREAD_FUTURE& other)
{
static_cast<base_type*>(this)->swap(other);
}
// todo this function must be private and friendship provided to the internal users.
void set_async()
{
this->future_->set_async();
}
// todo this function must be private and friendship provided to the internal users.
void set_deferred()
{
this->future_->set_deferred();
}
bool run_if_is_deferred() {
return this->future_->run_if_is_deferred();
}
bool run_if_is_deferred_or_ready() {
return this->future_->run_if_is_deferred_or_ready();
}
// retrieving the value
move_dest_type get()
{
if (this->future_ == 0)
{
boost::throw_exception(future_uninitialized());
}
unique_lock<boost::mutex> lk(this->future_->mutex);
if (! this->future_->valid(lk))
{
boost::throw_exception(future_uninitialized());
}
#ifdef BOOST_THREAD_PROVIDES_FUTURE_INVALID_AFTER_GET
this->future_->invalidate(lk);
#endif
return this->future_->get(lk);
}
move_dest_type get_or(BOOST_THREAD_RV_REF(R) v) // EXTENSION
{
if (this->future_ == 0)
{
boost::throw_exception(future_uninitialized());
}
unique_lock<boost::mutex> lk(this->future_->mutex);
if (! this->future_->valid(lk))
{
boost::throw_exception(future_uninitialized());
}
this->future_->wait(lk, false);
#ifdef BOOST_THREAD_PROVIDES_FUTURE_INVALID_AFTER_GET
this->future_->invalidate(lk);
#endif
if (this->future_->has_value(lk)) return this->future_->get(lk);
else return boost::move(v);
}
move_dest_type get_or(R const& v) // EXTENSION
{
if (this->future_ == 0)
{
boost::throw_exception(future_uninitialized());
}
unique_lock<boost::mutex> lk(this->future_->mutex);
if (! this->future_->valid(lk))
{
boost::throw_exception(future_uninitialized());
}
this->future_->wait(lk, false);
#ifdef BOOST_THREAD_PROVIDES_FUTURE_INVALID_AFTER_GET
this->future_->invalidate(lk);
#endif
if (this->future_->has_value(lk)) return this->future_->get(lk);
else return v;
}
#if defined BOOST_THREAD_PROVIDES_FUTURE_CONTINUATION
template<typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(BOOST_THREAD_FUTURE)>::type>
then(BOOST_THREAD_FWD_REF(F) func); // EXTENSION
template<typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(BOOST_THREAD_FUTURE)>::type>
then(launch policy, BOOST_THREAD_FWD_REF(F) func); // EXTENSION
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
template<typename Ex, typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(BOOST_THREAD_FUTURE)>::type>
then(Ex &ex, BOOST_THREAD_FWD_REF(F) func); // EXTENSION
#endif
#endif
#if defined BOOST_THREAD_PROVIDES_FUTURE_UNWRAP
inline
BOOST_THREAD_FUTURE<R2>
unwrap(); // EXTENSION
#endif
};
template <typename R>
class shared_future : public detail::basic_future<R>
{
typedef detail::basic_future<R> base_type;
typedef typename base_type::future_ptr future_ptr;
friend class detail::future_waiter;
friend class promise<R>;
#if defined BOOST_THREAD_PROVIDES_FUTURE_CONTINUATION
template <typename, typename, typename>
friend struct detail::future_async_continuation_shared_state;
template <typename, typename, typename>
friend struct detail::future_deferred_continuation_shared_state;
template <class F, class Rp, class Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_async_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c);
template <class F, class Rp, class Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_sync_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c);
template <class F, class Rp, class Fp>
friend BOOST_THREAD_FUTURE<Rp>
detail::make_future_deferred_continuation_shared_state(boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c);
#endif
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
template <class> friend class packaged_task;// todo check if this works in windows
#else
friend class packaged_task<R>;
#endif
shared_future(future_ptr a_future):
base_type(a_future)
{}
public:
BOOST_THREAD_COPYABLE_AND_MOVABLE(shared_future)
typedef R value_type; // EXTENSION
shared_future(shared_future const& other):
base_type(other.future_)
{}
typedef future_state::state state;
BOOST_CONSTEXPR shared_future()
{}
//BOOST_CONSTEXPR
shared_future(exceptional_ptr const& ex):
base_type(ex) {}
~shared_future()
{}
shared_future& operator=(BOOST_THREAD_COPY_ASSIGN_REF(shared_future) other)
{
this->future_ = other.future_;
return *this;
}
shared_future(BOOST_THREAD_RV_REF(shared_future) other) BOOST_NOEXCEPT :
base_type(boost::move(static_cast<base_type&>(BOOST_THREAD_RV(other))))
{
}
shared_future(BOOST_THREAD_RV_REF( BOOST_THREAD_FUTURE<R> ) other) BOOST_NOEXCEPT :
base_type(boost::move(static_cast<base_type&>(BOOST_THREAD_RV(other))))
{
}
shared_future& operator=(BOOST_THREAD_RV_REF(shared_future) other) BOOST_NOEXCEPT
{
base_type::operator=(boost::move(static_cast<base_type&>(BOOST_THREAD_RV(other))));
return *this;
}
shared_future& operator=(BOOST_THREAD_RV_REF( BOOST_THREAD_FUTURE<R> ) other) BOOST_NOEXCEPT
{
base_type::operator=(boost::move(static_cast<base_type&>(BOOST_THREAD_RV(other))));
return *this;
}
void swap(shared_future& other) BOOST_NOEXCEPT
{
static_cast<base_type*>(this)->swap(other);
}
bool run_if_is_deferred() {
return this->future_->run_if_is_deferred();
}
bool run_if_is_deferred_or_ready() {
return this->future_->run_if_is_deferred_or_ready();
}
// retrieving the value
typename detail::shared_state<R>::shared_future_get_result_type get() const
{
if(!this->future_)
{
boost::throw_exception(future_uninitialized());
}
return this->future_->get_sh();
}
template <typename R2>
typename boost::disable_if< is_void<R2>, typename detail::shared_state<R>::shared_future_get_result_type>::type
get_or(BOOST_THREAD_RV_REF(R2) v) const // EXTENSION
{
if(!this->future_)
{
boost::throw_exception(future_uninitialized());
}
this->future_->wait();
if (this->future_->has_value()) return this->future_->get_sh();
else return boost::move(v);
}
#if defined BOOST_THREAD_PROVIDES_FUTURE_CONTINUATION
template<typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(shared_future)>::type>
then(BOOST_THREAD_FWD_REF(F) func) const; // EXTENSION
template<typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(shared_future)>::type>
then(launch policy, BOOST_THREAD_FWD_REF(F) func) const; // EXTENSION
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
template<typename Ex, typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(shared_future)>::type>
then(Ex& ex, BOOST_THREAD_FWD_REF(F) func) const; // EXTENSION
#endif
#endif
};
BOOST_THREAD_DCL_MOVABLE_BEG(T) shared_future<T> BOOST_THREAD_DCL_MOVABLE_END
template <typename R>
class promise
{
typedef boost::shared_ptr<detail::shared_state<R> > future_ptr;
typedef typename detail::shared_state<R>::source_reference_type source_reference_type;
typedef typename detail::shared_state<R>::rvalue_source_type rvalue_source_type;
typedef typename detail::shared_state<R>::move_dest_type move_dest_type;
typedef typename detail::shared_state<R>::shared_future_get_result_type shared_future_get_result_type;
future_ptr future_;
bool future_obtained;
void lazy_init()
{
#if defined BOOST_THREAD_PROVIDES_PROMISE_LAZY
#include <boost/detail/atomic_undef_macros.hpp>
if(!atomic_load(&future_))
{
future_ptr blank;
atomic_compare_exchange(&future_,&blank,future_ptr(new detail::shared_state<R>));
}
#include <boost/detail/atomic_redef_macros.hpp>
#endif
}
public:
BOOST_THREAD_MOVABLE_ONLY(promise)
#if defined BOOST_THREAD_PROVIDES_FUTURE_CTOR_ALLOCATORS
template <class Allocator>
promise(boost::allocator_arg_t, Allocator a)
{
typedef typename Allocator::template rebind<detail::shared_state<R> >::other A2;
A2 a2(a);
typedef thread_detail::allocator_destructor<A2> D;
future_ = future_ptr(::new(a2.allocate(1)) detail::shared_state<R>(), D(a2, 1) );
future_obtained = false;
}
#endif
promise():
#if defined BOOST_THREAD_PROVIDES_PROMISE_LAZY
future_(),
#else
future_(new detail::shared_state<R>()),
#endif
future_obtained(false)
{}
~promise()
{
if(future_)
{
boost::unique_lock<boost::mutex> lock(future_->mutex);
if(!future_->done && !future_->is_constructed)
{
future_->mark_exceptional_finish_internal(boost::copy_exception(broken_promise()), lock);
}
}
}
// Assignment
promise(BOOST_THREAD_RV_REF(promise) rhs) BOOST_NOEXCEPT :
future_(BOOST_THREAD_RV(rhs).future_),future_obtained(BOOST_THREAD_RV(rhs).future_obtained)
{
BOOST_THREAD_RV(rhs).future_.reset();
BOOST_THREAD_RV(rhs).future_obtained=false;
}
promise & operator=(BOOST_THREAD_RV_REF(promise) rhs) BOOST_NOEXCEPT
{
future_=BOOST_THREAD_RV(rhs).future_;
future_obtained=BOOST_THREAD_RV(rhs).future_obtained;
BOOST_THREAD_RV(rhs).future_.reset();
BOOST_THREAD_RV(rhs).future_obtained=false;
return *this;
}
void swap(promise& other)
{
future_.swap(other.future_);
std::swap(future_obtained,other.future_obtained);
}
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
void set_executor(executor_ptr_type aex)
{
lazy_init();
if (future_.get()==0)
{
boost::throw_exception(promise_moved());
}
boost::lock_guard<boost::mutex> lk(future_->mutex);
future_->set_executor_policy(aex, lk);
}
#endif
// Result retrieval
BOOST_THREAD_FUTURE<R> get_future()
{
lazy_init();
if (future_.get()==0)
{
boost::throw_exception(promise_moved());
}
if (future_obtained)
{
boost::throw_exception(future_already_retrieved());
}
future_obtained=true;
return BOOST_THREAD_FUTURE<R>(future_);
}
#if defined BOOST_NO_CXX11_RVALUE_REFERENCES
template <class TR>
typename boost::enable_if_c<is_copy_constructible<TR>::value && is_same<R, TR>::value, void>::type set_value(TR const & r)
{
lazy_init();
boost::unique_lock<boost::mutex> lock(future_->mutex);
if(future_->done)
{
boost::throw_exception(promise_already_satisfied());
}
future_->mark_finished_with_result_internal(r, lock);
}
#else
void set_value(source_reference_type r)
{
lazy_init();
boost::unique_lock<boost::mutex> lock(future_->mutex);
if(future_->done)
{
boost::throw_exception(promise_already_satisfied());
}
future_->mark_finished_with_result_internal(r, lock);
}
#endif
void set_value(rvalue_source_type r)
{
lazy_init();
boost::unique_lock<boost::mutex> lock(future_->mutex);
if(future_->done)
{
boost::throw_exception(promise_already_satisfied());
}
#if ! defined BOOST_NO_CXX11_RVALUE_REFERENCES
future_->mark_finished_with_result_internal(boost::move(r), lock);
#else
future_->mark_finished_with_result_internal(static_cast<rvalue_source_type>(r), lock);
#endif
}
#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template <class ...Args>
void emplace(BOOST_THREAD_FWD_REF(Args) ...args)
{
lazy_init();
boost::unique_lock<boost::mutex> lock(future_->mutex);
if(future_->done)
{
boost::throw_exception(promise_already_satisfied());
}
future_->mark_finished_with_result_internal(lock, boost::forward<Args>(args)...);
}
#endif
void set_exception(boost::exception_ptr p)
{
lazy_init();
boost::unique_lock<boost::mutex> lock(future_->mutex);
if(future_->done)
{
boost::throw_exception(promise_already_satisfied());
}
future_->mark_exceptional_finish_internal(p, lock);
}
template <typename E>
void set_exception(E ex)
{
set_exception(boost::copy_exception(ex));
}
// setting the result with deferred notification
#if defined BOOST_NO_CXX11_RVALUE_REFERENCES
template <class TR>
typename boost::enable_if_c<is_copy_constructible<TR>::value && is_same<R, TR>::value, void>::type set_value_at_thread_exit(TR const& r)
{
if (future_.get()==0)
{
boost::throw_exception(promise_moved());
}
future_->set_value_at_thread_exit(r);
}
#else
void set_value_at_thread_exit(source_reference_type r)
{
if (future_.get()==0)
{
boost::throw_exception(promise_moved());
}
future_->set_value_at_thread_exit(r);
}
#endif
void set_value_at_thread_exit(BOOST_THREAD_RV_REF(R) r)
{
if (future_.get()==0)
{
boost::throw_exception(promise_moved());
}
future_->set_value_at_thread_exit(boost::move(r));
}
void set_exception_at_thread_exit(exception_ptr e)
{
if (future_.get()==0)
{
boost::throw_exception(promise_moved());
}
future_->set_exception_at_thread_exit(e);
}
template <typename E>
void set_exception_at_thread_exit(E ex)
{
set_exception_at_thread_exit(boost::copy_exception(ex));
}
template<typename F>
void set_wait_callback(F f)
{
lazy_init();
future_->set_wait_callback(f,this);
}
};
template <typename R>
class promise<R&>
{
typedef boost::shared_ptr<detail::shared_state<R&> > future_ptr;
future_ptr future_;
bool future_obtained;
void lazy_init()
{
#if defined BOOST_THREAD_PROVIDES_PROMISE_LAZY
#include <boost/detail/atomic_undef_macros.hpp>
if(!atomic_load(&future_))
{
future_ptr blank;
atomic_compare_exchange(&future_,&blank,future_ptr(new detail::shared_state<R&>));
}
#include <boost/detail/atomic_redef_macros.hpp>
#endif
}
public:
BOOST_THREAD_MOVABLE_ONLY(promise)
#if defined BOOST_THREAD_PROVIDES_FUTURE_CTOR_ALLOCATORS
template <class Allocator>
promise(boost::allocator_arg_t, Allocator a)
{
typedef typename Allocator::template rebind<detail::shared_state<R&> >::other A2;
A2 a2(a);
typedef thread_detail::allocator_destructor<A2> D;
future_ = future_ptr(::new(a2.allocate(1)) detail::shared_state<R&>(), D(a2, 1) );
future_obtained = false;
}
#endif
promise():
#if defined BOOST_THREAD_PROVIDES_PROMISE_LAZY
future_(),
#else
future_(new detail::shared_state<R&>()),
#endif
future_obtained(false)
{}
~promise()
{
if(future_)
{
boost::unique_lock<boost::mutex> lock(future_->mutex);
if(!future_->done && !future_->is_constructed)
{
future_->mark_exceptional_finish_internal(boost::copy_exception(broken_promise()), lock);
}
}
}
// Assignment
promise(BOOST_THREAD_RV_REF(promise) rhs) BOOST_NOEXCEPT :
future_(BOOST_THREAD_RV(rhs).future_),future_obtained(BOOST_THREAD_RV(rhs).future_obtained)
{
BOOST_THREAD_RV(rhs).future_.reset();
BOOST_THREAD_RV(rhs).future_obtained=false;
}
promise & operator=(BOOST_THREAD_RV_REF(promise) rhs) BOOST_NOEXCEPT
{
future_=BOOST_THREAD_RV(rhs).future_;
future_obtained=BOOST_THREAD_RV(rhs).future_obtained;
BOOST_THREAD_RV(rhs).future_.reset();
BOOST_THREAD_RV(rhs).future_obtained=false;
return *this;
}
void swap(promise& other)
{
future_.swap(other.future_);
std::swap(future_obtained,other.future_obtained);
}
// Result retrieval
BOOST_THREAD_FUTURE<R&> get_future()
{
lazy_init();
if (future_.get()==0)
{
boost::throw_exception(promise_moved());
}
if (future_obtained)
{
boost::throw_exception(future_already_retrieved());
}
future_obtained=true;
return BOOST_THREAD_FUTURE<R&>(future_);
}
void set_value(R& r)
{
lazy_init();
boost::unique_lock<boost::mutex> lock(future_->mutex);
if(future_->done)
{
boost::throw_exception(promise_already_satisfied());
}
future_->mark_finished_with_result_internal(r, lock);
}
void set_exception(boost::exception_ptr p)
{
lazy_init();
boost::unique_lock<boost::mutex> lock(future_->mutex);
if(future_->done)
{
boost::throw_exception(promise_already_satisfied());
}
future_->mark_exceptional_finish_internal(p, lock);
}
template <typename E>
void set_exception(E ex)
{
set_exception(boost::copy_exception(ex));
}
// setting the result with deferred notification
void set_value_at_thread_exit(R& r)
{
if (future_.get()==0)
{
boost::throw_exception(promise_moved());
}
future_->set_value_at_thread_exit(r);
}
void set_exception_at_thread_exit(exception_ptr e)
{
if (future_.get()==0)
{
boost::throw_exception(promise_moved());
}
future_->set_exception_at_thread_exit(e);
}
template <typename E>
void set_exception_at_thread_exit(E ex)
{
set_exception_at_thread_exit(boost::copy_exception(ex));
}
template<typename F>
void set_wait_callback(F f)
{
lazy_init();
future_->set_wait_callback(f,this);
}
};
template <>
class promise<void>
{
typedef boost::shared_ptr<detail::shared_state<void> > future_ptr;
future_ptr future_;
bool future_obtained;
void lazy_init()
{
#if defined BOOST_THREAD_PROVIDES_PROMISE_LAZY
if(!atomic_load(&future_))
{
future_ptr blank;
atomic_compare_exchange(&future_,&blank,future_ptr(new detail::shared_state<void>));
}
#endif
}
public:
BOOST_THREAD_MOVABLE_ONLY(promise)
#if defined BOOST_THREAD_PROVIDES_FUTURE_CTOR_ALLOCATORS
template <class Allocator>
promise(boost::allocator_arg_t, Allocator a)
{
typedef typename Allocator::template rebind<detail::shared_state<void> >::other A2;
A2 a2(a);
typedef thread_detail::allocator_destructor<A2> D;
future_ = future_ptr(::new(a2.allocate(1)) detail::shared_state<void>(), D(a2, 1) );
future_obtained = false;
}
#endif
promise():
#if defined BOOST_THREAD_PROVIDES_PROMISE_LAZY
future_(),
#else
future_(new detail::shared_state<void>),
#endif
future_obtained(false)
{}
~promise()
{
if(future_)
{
boost::unique_lock<boost::mutex> lock(future_->mutex);
if(!future_->done && !future_->is_constructed)
{
future_->mark_exceptional_finish_internal(boost::copy_exception(broken_promise()), lock);
}
}
}
// Assignment
promise(BOOST_THREAD_RV_REF(promise) rhs) BOOST_NOEXCEPT :
future_(BOOST_THREAD_RV(rhs).future_),future_obtained(BOOST_THREAD_RV(rhs).future_obtained)
{
// we need to release the future as shared_ptr doesn't implements move semantics
BOOST_THREAD_RV(rhs).future_.reset();
BOOST_THREAD_RV(rhs).future_obtained=false;
}
promise & operator=(BOOST_THREAD_RV_REF(promise) rhs) BOOST_NOEXCEPT
{
future_=BOOST_THREAD_RV(rhs).future_;
future_obtained=BOOST_THREAD_RV(rhs).future_obtained;
BOOST_THREAD_RV(rhs).future_.reset();
BOOST_THREAD_RV(rhs).future_obtained=false;
return *this;
}
void swap(promise& other)
{
future_.swap(other.future_);
std::swap(future_obtained,other.future_obtained);
}
// Result retrieval
BOOST_THREAD_FUTURE<void> get_future()
{
lazy_init();
if (future_.get()==0)
{
boost::throw_exception(promise_moved());
}
if(future_obtained)
{
boost::throw_exception(future_already_retrieved());
}
future_obtained=true;
//return BOOST_THREAD_MAKE_RV_REF(BOOST_THREAD_FUTURE<void>(future_));
return BOOST_THREAD_FUTURE<void>(future_);
}
void set_value()
{
lazy_init();
boost::unique_lock<boost::mutex> lock(future_->mutex);
if(future_->done)
{
boost::throw_exception(promise_already_satisfied());
}
future_->mark_finished_with_result_internal(lock);
}
void set_exception(boost::exception_ptr p)
{
lazy_init();
boost::unique_lock<boost::mutex> lock(future_->mutex);
if(future_->done)
{
boost::throw_exception(promise_already_satisfied());
}
future_->mark_exceptional_finish_internal(p,lock);
}
template <typename E>
void set_exception(E ex)
{
set_exception(boost::copy_exception(ex));
}
// setting the result with deferred notification
void set_value_at_thread_exit()
{
if (future_.get()==0)
{
boost::throw_exception(promise_moved());
}
future_->set_value_at_thread_exit();
}
void set_exception_at_thread_exit(exception_ptr e)
{
if (future_.get()==0)
{
boost::throw_exception(promise_moved());
}
future_->set_exception_at_thread_exit(e);
}
template <typename E>
void set_exception_at_thread_exit(E ex)
{
set_exception_at_thread_exit(boost::copy_exception(ex));
}
template<typename F>
void set_wait_callback(F f)
{
lazy_init();
future_->set_wait_callback(f,this);
}
};
}
#if defined BOOST_THREAD_PROVIDES_FUTURE_CTOR_ALLOCATORS
namespace boost { namespace container {
template <class R, class Alloc>
struct uses_allocator< ::boost::promise<R> , Alloc> : true_type
{
};
}}
#if ! defined BOOST_NO_CXX11_ALLOCATOR
namespace std {
template <class R, class Alloc>
struct uses_allocator< ::boost::promise<R> , Alloc> : true_type
{
};
}
#endif
#endif
namespace boost
{
BOOST_THREAD_DCL_MOVABLE_BEG(T) promise<T> BOOST_THREAD_DCL_MOVABLE_END
namespace detail
{
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
template<typename R>
struct task_base_shared_state;
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
template<typename R, typename ...ArgTypes>
struct task_base_shared_state<R(ArgTypes...)>:
#else
template<typename R>
struct task_base_shared_state<R()>:
#endif
#else
template<typename R>
struct task_base_shared_state:
#endif
detail::shared_state<R>
{
bool started;
task_base_shared_state():
started(false)
{}
void reset()
{
// todo The packaged_task::reset must be as if an assignemnt froma new packaged_task with the same function
// the reset function is an optimization that avoids reallocating a new task.
started=false;
this->validate();
}
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
virtual void do_run(BOOST_THREAD_RV_REF(ArgTypes) ... args)=0;
void run(BOOST_THREAD_RV_REF(ArgTypes) ... args)
#else
virtual void do_run()=0;
void run()
#endif
{
{
boost::lock_guard<boost::mutex> lk(this->mutex);
if(started)
{
boost::throw_exception(task_already_started());
}
started=true;
}
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
do_run(boost::move(args)...);
#else
do_run();
#endif
}
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
virtual void do_apply(BOOST_THREAD_RV_REF(ArgTypes) ... args)=0;
void apply(BOOST_THREAD_RV_REF(ArgTypes) ... args)
#else
virtual void do_apply()=0;
void apply()
#endif
{
{
boost::lock_guard<boost::mutex> lk(this->mutex);
if(started)
{
boost::throw_exception(task_already_started());
}
started=true;
}
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
do_apply(boost::move(args)...);
#else
do_apply();
#endif
}
void owner_destroyed()
{
boost::unique_lock<boost::mutex> lk(this->mutex);
if(!started)
{
started=true;
this->mark_exceptional_finish_internal(boost::copy_exception(boost::broken_promise()), lk);
}
}
};
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
template<typename F, typename R>
struct task_shared_state;
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
template<typename F, typename R, typename ...ArgTypes>
struct task_shared_state<F, R(ArgTypes...)>:
task_base_shared_state<R(ArgTypes...)>
#else
template<typename F, typename R>
struct task_shared_state<F, R()>:
task_base_shared_state<R()>
#endif
#else
template<typename F, typename R>
struct task_shared_state:
task_base_shared_state<R>
#endif
{
private:
task_shared_state(task_shared_state&);
public:
F f;
task_shared_state(F const& f_):
f(f_)
{}
task_shared_state(BOOST_THREAD_RV_REF(F) f_):
f(boost::move(f_))
{}
F callable()
{
return boost::move(f);
}
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
void do_apply(BOOST_THREAD_RV_REF(ArgTypes) ... args)
{
try
{
this->set_value_at_thread_exit(f(boost::move(args)...));
}
#else
void do_apply()
{
try
{
this->set_value_at_thread_exit(f());
}
#endif
catch(...)
{
this->set_exception_at_thread_exit(current_exception());
}
}
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
void do_run(BOOST_THREAD_RV_REF(ArgTypes) ... args)
{
try
{
this->mark_finished_with_result(f(boost::move(args)...));
}
#else
void do_run()
{
try
{
#if ! defined BOOST_NO_CXX11_RVALUE_REFERENCES
R res((f()));
this->mark_finished_with_result(boost::move(res));
#else
this->mark_finished_with_result(f());
#endif
}
#endif
catch(...)
{
this->mark_exceptional_finish();
}
}
};
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
template<typename F, typename R, typename ...ArgTypes>
struct task_shared_state<F, R&(ArgTypes...)>:
task_base_shared_state<R&(ArgTypes...)>
#else
template<typename F, typename R>
struct task_shared_state<F, R&()>:
task_base_shared_state<R&()>
#endif
#else
template<typename F, typename R>
struct task_shared_state<F,R&>:
task_base_shared_state<R&>
#endif
{
private:
task_shared_state(task_shared_state&);
public:
F f;
task_shared_state(F const& f_):
f(f_)
{}
task_shared_state(BOOST_THREAD_RV_REF(F) f_):
f(boost::move(f_))
{}
F callable()
{
return f;
}
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
void do_apply(BOOST_THREAD_RV_REF(ArgTypes) ... args)
{
try
{
this->set_value_at_thread_exit(f(boost::move(args)...));
}
#else
void do_apply()
{
try
{
this->set_value_at_thread_exit(f());
}
#endif
catch(...)
{
this->set_exception_at_thread_exit(current_exception());
}
}
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
void do_run(BOOST_THREAD_RV_REF(ArgTypes) ... args)
{
try
{
this->mark_finished_with_result(f(boost::move(args)...));
}
#else
void do_run()
{
try
{
R& res((f()));
this->mark_finished_with_result(res);
}
#endif
catch(...)
{
this->mark_exceptional_finish();
}
}
};
#if defined(BOOST_THREAD_RVALUE_REFERENCES_DONT_MATCH_FUNTION_PTR)
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
template<typename R, typename ...ArgTypes>
struct task_shared_state<R (*)(ArgTypes...), R(ArgTypes...)>:
task_base_shared_state<R(ArgTypes...)>
#else
template<typename R>
struct task_shared_state<R (*)(), R()>:
task_base_shared_state<R()>
#endif
#else
template<typename R>
struct task_shared_state<R (*)(), R> :
task_base_shared_state<R>
#endif
{
private:
task_shared_state(task_shared_state&);
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
typedef R (*CallableType)(ArgTypes ... );
#else
typedef R (*CallableType)();
#endif
public:
CallableType f;
task_shared_state(CallableType f_):
f(f_)
{}
CallableType callable()
{
return f;
}
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
void do_apply(BOOST_THREAD_RV_REF(ArgTypes) ... args)
{
try
{
this->set_value_at_thread_exit(f(boost::move(args)...));
}
#else
void do_apply()
{
try
{
R r((f()));
this->set_value_at_thread_exit(boost::move(r));
}
#endif
catch(...)
{
this->set_exception_at_thread_exit(current_exception());
}
}
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
void do_run(BOOST_THREAD_RV_REF(ArgTypes) ... args)
{
try
{
this->mark_finished_with_result(f(boost::move(args)...));
}
#else
void do_run()
{
try
{
R res((f()));
this->mark_finished_with_result(boost::move(res));
}
#endif
catch(...)
{
this->mark_exceptional_finish();
}
}
};
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
template<typename R, typename ...ArgTypes>
struct task_shared_state<R& (*)(ArgTypes...), R&(ArgTypes...)>:
task_base_shared_state<R&(ArgTypes...)>
#else
template<typename R>
struct task_shared_state<R& (*)(), R&()>:
task_base_shared_state<R&()>
#endif
#else
template<typename R>
struct task_shared_state<R& (*)(), R&> :
task_base_shared_state<R&>
#endif
{
private:
task_shared_state(task_shared_state&);
public:
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
typedef R& (*CallableType)(BOOST_THREAD_RV_REF(ArgTypes) ... );
#else
typedef R& (*CallableType)();
#endif
CallableType f;
task_shared_state(CallableType f_):
f(f_)
{}
CallableType callable()
{
return boost::move(f);
}
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
void do_apply(BOOST_THREAD_RV_REF(ArgTypes) ... args)
{
try
{
this->set_value_at_thread_exit(f(boost::move(args)...));
}
#else
void do_apply()
{
try
{
this->set_value_at_thread_exit(f());
}
#endif
catch(...)
{
this->set_exception_at_thread_exit(current_exception());
}
}
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
void do_run(BOOST_THREAD_RV_REF(ArgTypes) ... args)
{
try
{
this->mark_finished_with_result(f(boost::move(args)...));
}
#else
void do_run()
{
try
{
this->mark_finished_with_result(f());
}
#endif
catch(...)
{
this->mark_exceptional_finish();
}
}
};
#endif
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
template<typename F, typename ...ArgTypes>
struct task_shared_state<F, void(ArgTypes...)>:
task_base_shared_state<void(ArgTypes...)>
#else
template<typename F>
struct task_shared_state<F, void()>:
task_base_shared_state<void()>
#endif
#else
template<typename F>
struct task_shared_state<F,void>:
task_base_shared_state<void>
#endif
{
private:
task_shared_state(task_shared_state&);
public:
typedef F CallableType;
F f;
task_shared_state(F const& f_):
f(f_)
{}
task_shared_state(BOOST_THREAD_RV_REF(F) f_):
f(boost::move(f_))
{}
F callable()
{
return boost::move(f);
}
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
void do_apply(BOOST_THREAD_RV_REF(ArgTypes) ... args)
{
try
{
f(boost::move(args)...);
#else
void do_apply()
{
try
{
f();
#endif
this->set_value_at_thread_exit();
}
catch(...)
{
this->set_exception_at_thread_exit(current_exception());
}
}
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
void do_run(BOOST_THREAD_RV_REF(ArgTypes) ... args)
{
try
{
f(boost::move(args)...);
#else
void do_run()
{
try
{
f();
#endif
this->mark_finished_with_result();
}
catch(...)
{
this->mark_exceptional_finish();
}
}
};
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
template<typename ...ArgTypes>
struct task_shared_state<void (*)(ArgTypes...), void(ArgTypes...)>:
task_base_shared_state<void(ArgTypes...)>
#else
template<>
struct task_shared_state<void (*)(), void()>:
task_base_shared_state<void()>
#endif
#else
template<>
struct task_shared_state<void (*)(),void>:
task_base_shared_state<void>
#endif
{
private:
task_shared_state(task_shared_state&);
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
typedef void (*CallableType)(ArgTypes...);
#else
typedef void (*CallableType)();
#endif
public:
CallableType f;
task_shared_state(CallableType f_):
f(f_)
{}
CallableType callable()
{
return f;
}
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
void do_apply(BOOST_THREAD_RV_REF(ArgTypes) ... args)
{
try
{
f(boost::move(args)...);
#else
void do_apply()
{
try
{
f();
#endif
this->set_value_at_thread_exit();
}
catch(...)
{
this->set_exception_at_thread_exit(current_exception());
}
}
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
void do_run(BOOST_THREAD_RV_REF(ArgTypes) ... args)
{
try
{
f(boost::move(args)...);
#else
void do_run()
{
try
{
f();
#endif
this->mark_finished_with_result();
}
catch(...)
{
this->mark_exceptional_finish();
}
}
};
}
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
template<typename R, typename ...ArgTypes>
class packaged_task<R(ArgTypes...)>
{
typedef boost::shared_ptr<detail::task_base_shared_state<R(ArgTypes...)> > task_ptr;
boost::shared_ptr<detail::task_base_shared_state<R(ArgTypes...)> > task;
#else
template<typename R>
class packaged_task<R()>
{
typedef boost::shared_ptr<detail::task_base_shared_state<R()> > task_ptr;
boost::shared_ptr<detail::task_base_shared_state<R()> > task;
#endif
#else
template<typename R>
class packaged_task
{
typedef boost::shared_ptr<detail::task_base_shared_state<R> > task_ptr;
boost::shared_ptr<detail::task_base_shared_state<R> > task;
#endif
bool future_obtained;
struct dummy;
public:
typedef R result_type;
BOOST_THREAD_MOVABLE_ONLY(packaged_task)
packaged_task():
future_obtained(false)
{}
// construction and destruction
#if defined(BOOST_THREAD_RVALUE_REFERENCES_DONT_MATCH_FUNTION_PTR)
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
explicit packaged_task(R(*f)(), BOOST_THREAD_FWD_REF(ArgTypes)... args)
{
typedef R(*FR)(BOOST_THREAD_FWD_REF(ArgTypes)...);
typedef detail::task_shared_state<FR,R(ArgTypes...)> task_shared_state_type;
task= task_ptr(new task_shared_state_type(f, boost::move(args)...));
future_obtained=false;
}
#else
explicit packaged_task(R(*f)())
{
typedef R(*FR)();
typedef detail::task_shared_state<FR,R()> task_shared_state_type;
task= task_ptr(new task_shared_state_type(f));
future_obtained=false;
}
#endif
#else
explicit packaged_task(R(*f)())
{
typedef R(*FR)();
typedef detail::task_shared_state<FR,R> task_shared_state_type;
task= task_ptr(new task_shared_state_type(f));
future_obtained=false;
}
#endif
#endif
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
template <class F>
explicit packaged_task(BOOST_THREAD_FWD_REF(F) f
, typename boost::disable_if<is_same<typename decay<F>::type, packaged_task>, dummy* >::type=0
)
{
typedef typename decay<F>::type FR;
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
typedef detail::task_shared_state<FR,R(ArgTypes...)> task_shared_state_type;
#else
typedef detail::task_shared_state<FR,R()> task_shared_state_type;
#endif
#else
typedef detail::task_shared_state<FR,R> task_shared_state_type;
#endif
task = task_ptr(new task_shared_state_type(boost::forward<F>(f)));
future_obtained = false;
}
#else
template <class F>
explicit packaged_task(F const& f
, typename boost::disable_if<is_same<typename decay<F>::type, packaged_task>, dummy* >::type=0
)
{
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
typedef detail::task_shared_state<F,R(ArgTypes...)> task_shared_state_type;
#else
typedef detail::task_shared_state<F,R()> task_shared_state_type;
#endif
#else
typedef detail::task_shared_state<F,R> task_shared_state_type;
#endif
task = task_ptr(new task_shared_state_type(f));
future_obtained=false;
}
template <class F>
explicit packaged_task(BOOST_THREAD_RV_REF(F) f)
{
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
typedef detail::task_shared_state<F,R(ArgTypes...)> task_shared_state_type;
task = task_ptr(new task_shared_state_type(boost::move(f)));
#else
typedef detail::task_shared_state<F,R()> task_shared_state_type;
task = task_ptr(new task_shared_state_type(boost::move(f)));
#endif
#else
typedef detail::task_shared_state<F,R> task_shared_state_type;
task = task_ptr(new task_shared_state_type(boost::move(f)));
#endif
future_obtained=false;
}
#endif
#if defined BOOST_THREAD_PROVIDES_FUTURE_CTOR_ALLOCATORS
#if defined(BOOST_THREAD_RVALUE_REFERENCES_DONT_MATCH_FUNTION_PTR)
template <class Allocator>
packaged_task(boost::allocator_arg_t, Allocator a, R(*f)())
{
typedef R(*FR)();
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
typedef detail::task_shared_state<FR,R(ArgTypes...)> task_shared_state_type;
#else
typedef detail::task_shared_state<FR,R()> task_shared_state_type;
#endif
#else
typedef detail::task_shared_state<FR,R> task_shared_state_type;
#endif
typedef typename Allocator::template rebind<task_shared_state_type>::other A2;
A2 a2(a);
typedef thread_detail::allocator_destructor<A2> D;
task = task_ptr(::new(a2.allocate(1)) task_shared_state_type(f), D(a2, 1) );
future_obtained = false;
}
#endif // BOOST_THREAD_RVALUE_REFERENCES_DONT_MATCH_FUNTION_PTR
#if ! defined BOOST_NO_CXX11_RVALUE_REFERENCES
template <class F, class Allocator>
packaged_task(boost::allocator_arg_t, Allocator a, BOOST_THREAD_FWD_REF(F) f)
{
typedef typename decay<F>::type FR;
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
typedef detail::task_shared_state<FR,R(ArgTypes...)> task_shared_state_type;
#else
typedef detail::task_shared_state<FR,R()> task_shared_state_type;
#endif
#else
typedef detail::task_shared_state<FR,R> task_shared_state_type;
#endif
typedef typename Allocator::template rebind<task_shared_state_type>::other A2;
A2 a2(a);
typedef thread_detail::allocator_destructor<A2> D;
task = task_ptr(::new(a2.allocate(1)) task_shared_state_type(boost::forward<F>(f)), D(a2, 1) );
future_obtained = false;
}
#else // ! defined BOOST_NO_CXX11_RVALUE_REFERENCES
template <class F, class Allocator>
packaged_task(boost::allocator_arg_t, Allocator a, const F& f)
{
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
typedef detail::task_shared_state<F,R(ArgTypes...)> task_shared_state_type;
#else
typedef detail::task_shared_state<F,R()> task_shared_state_type;
#endif
#else
typedef detail::task_shared_state<F,R> task_shared_state_type;
#endif
typedef typename Allocator::template rebind<task_shared_state_type>::other A2;
A2 a2(a);
typedef thread_detail::allocator_destructor<A2> D;
task = task_ptr(::new(a2.allocate(1)) task_shared_state_type(f), D(a2, 1) );
future_obtained = false;
}
template <class F, class Allocator>
packaged_task(boost::allocator_arg_t, Allocator a, BOOST_THREAD_RV_REF(F) f)
{
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
typedef detail::task_shared_state<F,R(ArgTypes...)> task_shared_state_type;
#else
typedef detail::task_shared_state<F,R()> task_shared_state_type;
#endif
#else
typedef detail::task_shared_state<F,R> task_shared_state_type;
#endif
typedef typename Allocator::template rebind<task_shared_state_type>::other A2;
A2 a2(a);
typedef thread_detail::allocator_destructor<A2> D;
task = task_ptr(::new(a2.allocate(1)) task_shared_state_type(boost::move(f)), D(a2, 1) );
future_obtained = false;
}
#endif //BOOST_NO_CXX11_RVALUE_REFERENCES
#endif // BOOST_THREAD_PROVIDES_FUTURE_CTOR_ALLOCATORS
~packaged_task() {
if(task) {
task->owner_destroyed();
}
}
// assignment
packaged_task(BOOST_THREAD_RV_REF(packaged_task) other) BOOST_NOEXCEPT
: future_obtained(BOOST_THREAD_RV(other).future_obtained) {
task.swap(BOOST_THREAD_RV(other).task);
BOOST_THREAD_RV(other).future_obtained=false;
}
packaged_task& operator=(BOOST_THREAD_RV_REF(packaged_task) other) BOOST_NOEXCEPT {
#if ! defined BOOST_NO_CXX11_RVALUE_REFERENCES
packaged_task temp(boost::move(other));
#else
packaged_task temp(static_cast<BOOST_THREAD_RV_REF(packaged_task)>(other));
#endif
swap(temp);
return *this;
}
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
void set_executor(executor_ptr_type aex)
{
if (!valid())
boost::throw_exception(task_moved());
boost::lock_guard<boost::mutex> lk(task->mutex);
task->set_executor_policy(aex, lk);
}
#endif
void reset() {
if (!valid())
boost::throw_exception(future_error(system::make_error_code(future_errc::no_state)));
// As if *this = packaged_task(task->callable());
task->reset();
future_obtained=false;
}
void swap(packaged_task& other) BOOST_NOEXCEPT {
task.swap(other.task);
std::swap(future_obtained,other.future_obtained);
}
bool valid() const BOOST_NOEXCEPT {
return task.get()!=0;
}
// result retrieval
BOOST_THREAD_FUTURE<R> get_future() {
if(!task) {
boost::throw_exception(task_moved());
} else if(!future_obtained) {
future_obtained=true;
return BOOST_THREAD_FUTURE<R>(task);
} else {
boost::throw_exception(future_already_retrieved());
}
}
// execution
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK && defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
void operator()(ArgTypes... args) {
if(!task) {
boost::throw_exception(task_moved());
}
task->run(boost::move(args)...);
}
void make_ready_at_thread_exit(ArgTypes... args) {
if(!task) {
boost::throw_exception(task_moved());
}
if (task->has_value()) {
boost::throw_exception(promise_already_satisfied());
}
task->apply(boost::move(args)...);
}
#else
void operator()() {
if(!task) {
boost::throw_exception(task_moved());
}
task->run();
}
void make_ready_at_thread_exit() {
if(!task) {
boost::throw_exception(task_moved());
}
if (task->has_value()) boost::throw_exception(promise_already_satisfied());
task->apply();
}
#endif
template<typename F>
void set_wait_callback(F f) {
task->set_wait_callback(f,this);
}
};
}
#if defined BOOST_THREAD_PROVIDES_FUTURE_CTOR_ALLOCATORS
namespace boost { namespace container {
template <class R, class Alloc>
struct uses_allocator< ::boost::packaged_task<R> , Alloc> : true_type
{};
}}
#if ! defined BOOST_NO_CXX11_ALLOCATOR
namespace std {
template <class R, class Alloc>
struct uses_allocator< ::boost::packaged_task<R> , Alloc> : true_type
{};
}
#endif
#endif
namespace boost
{
BOOST_THREAD_DCL_MOVABLE_BEG(T) packaged_task<T> BOOST_THREAD_DCL_MOVABLE_END
namespace detail
{
////////////////////////////////
// make_future_deferred_shared_state
////////////////////////////////
template <class Rp, class Fp>
BOOST_THREAD_FUTURE<Rp>
make_future_deferred_shared_state(BOOST_THREAD_FWD_REF(Fp) f) {
shared_ptr<future_deferred_shared_state<Rp, Fp> >
h(new future_deferred_shared_state<Rp, Fp>(boost::forward<Fp>(f)));
return BOOST_THREAD_FUTURE<Rp>(h);
}
////////////////////////////////
// make_future_async_shared_state
////////////////////////////////
template <class Rp, class Fp>
BOOST_THREAD_FUTURE<Rp>
make_future_async_shared_state(BOOST_THREAD_FWD_REF(Fp) f) {
shared_ptr<future_async_shared_state<Rp, Fp> >
h(new future_async_shared_state<Rp, Fp>());
h->init(boost::forward<Fp>(f));
return BOOST_THREAD_FUTURE<Rp>(h);
}
}
////////////////////////////////
// template <class F, class... ArgTypes>
// future<R> async(launch policy, F&&, ArgTypes&&...);
////////////////////////////////
#if defined BOOST_THREAD_RVALUE_REFERENCES_DONT_MATCH_FUNTION_PTR
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
template <class R, class... ArgTypes>
BOOST_THREAD_FUTURE<R>
async(launch policy, R(*f)(BOOST_THREAD_FWD_REF(ArgTypes)...), BOOST_THREAD_FWD_REF(ArgTypes)... args) {
typedef R(*F)(BOOST_THREAD_FWD_REF(ArgTypes)...);
typedef detail::invoker<typename decay<F>::type, typename decay<ArgTypes>::type...> BF;
typedef typename BF::result_type Rp;
if (underlying_cast<int>(policy) & int(launch::async)) {
return BOOST_THREAD_MAKE_RV_REF(boost::detail::make_future_async_shared_state<Rp>(
BF(
f
, thread_detail::decay_copy(boost::forward<ArgTypes>(args))...
)
));
} else if (underlying_cast<int>(policy) & int(launch::deferred)) {
return BOOST_THREAD_MAKE_RV_REF(boost::detail::make_future_deferred_shared_state<Rp>(
BF(
f
, thread_detail::decay_copy(boost::forward<ArgTypes>(args))...
)
));
} else {
std::terminate();
//BOOST_THREAD_FUTURE<R> ret;
//return ::boost::move(ret);
}
}
#else // defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
template <class R>
BOOST_THREAD_FUTURE<R>
async(launch policy, R(*f)()) {
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
typedef packaged_task<R()> packaged_task_type;
#else
typedef packaged_task<R> packaged_task_type;
#endif
if (underlying_cast<int>(policy) & int(launch::async)) {
packaged_task_type pt( f );
BOOST_THREAD_FUTURE<R> ret = BOOST_THREAD_MAKE_RV_REF(pt.get_future());
ret.set_async();
boost::thread( boost::move(pt) ).detach();
return ::boost::move(ret);
} else if (underlying_cast<int>(policy) & int(launch::deferred)) {
std::terminate();
//BOOST_THREAD_FUTURE<R> ret;
//return ::boost::move(ret);
} else {
std::terminate();
//BOOST_THREAD_FUTURE<R> ret;
//return ::boost::move(ret);
}
}
#endif
#endif // defined(BOOST_THREAD_RVALUE_REFERENCES_DONT_MATCH_FUNTION_PTR)
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
template <class F, class ...ArgTypes>
BOOST_THREAD_FUTURE<typename boost::result_of<typename decay<F>::type(
typename decay<ArgTypes>::type...
)>::type>
async(launch policy, BOOST_THREAD_FWD_REF(F) f, BOOST_THREAD_FWD_REF(ArgTypes)... args) {
typedef detail::invoker<typename decay<F>::type, typename decay<ArgTypes>::type...> BF;
typedef typename BF::result_type Rp;
if (underlying_cast<int>(policy) & int(launch::async)) {
return BOOST_THREAD_MAKE_RV_REF(boost::detail::make_future_async_shared_state<Rp>(
BF(
thread_detail::decay_copy(boost::forward<F>(f))
, thread_detail::decay_copy(boost::forward<ArgTypes>(args))...
)
));
} else if (underlying_cast<int>(policy) & int(launch::deferred)) {
return BOOST_THREAD_MAKE_RV_REF(boost::detail::make_future_deferred_shared_state<Rp>(
BF(
thread_detail::decay_copy(boost::forward<F>(f))
, thread_detail::decay_copy(boost::forward<ArgTypes>(args))...
)
));
} else {
std::terminate();
//BOOST_THREAD_FUTURE<R> ret;
//return ::boost::move(ret);
}
}
#else // defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
template <class F>
BOOST_THREAD_FUTURE<typename boost::result_of<typename decay<F>::type()>::type>
async(launch policy, BOOST_THREAD_FWD_REF(F) f) {
typedef typename boost::result_of<typename decay<F>::type()>::type R;
#if defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
typedef packaged_task<R()> packaged_task_type;
#else // defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
typedef packaged_task<R> packaged_task_type;
#endif // defined BOOST_THREAD_PROVIDES_SIGNATURE_PACKAGED_TASK
if (underlying_cast<int>(policy) & int(launch::async)) {
packaged_task_type pt( boost::forward<F>(f) );
BOOST_THREAD_FUTURE<R> ret = pt.get_future();
ret.set_async();
boost::thread( boost::move(pt) ).detach();
return ::boost::move(ret);
} else if (underlying_cast<int>(policy) & int(launch::deferred)) {
std::terminate();
//BOOST_THREAD_FUTURE<R> ret;
//return ::boost::move(ret);
// return boost::detail::make_future_deferred_shared_state<Rp>(
// BF(
// thread_detail::decay_copy(boost::forward<F>(f))
// )
// );
} else {
std::terminate();
//BOOST_THREAD_FUTURE<R> ret;
//return ::boost::move(ret);
}
}
#endif // defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
namespace detail {
/////////////////////////
/// shared_state_nullary_task
/////////////////////////
template<typename Rp, typename Fp>
struct shared_state_nullary_task
{
typedef shared_ptr<shared_state_base > storage_type;
storage_type that;
Fp f_;
public:
shared_state_nullary_task(storage_type st, BOOST_THREAD_FWD_REF(Fp) f)
: that(st), f_(boost::move(f))
{};
#if ! defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
BOOST_THREAD_COPYABLE_AND_MOVABLE(shared_state_nullary_task)
shared_state_nullary_task(shared_state_nullary_task const& x) //BOOST_NOEXCEPT
: that(x.that), f_(x.f_)
{}
shared_state_nullary_task& operator=(BOOST_THREAD_COPY_ASSIGN_REF(shared_state_nullary_task) x) //BOOST_NOEXCEPT
{
if (this != &x) {
that=x.that;
f_=x.f_;
}
return *this;
}
// move
shared_state_nullary_task(BOOST_THREAD_RV_REF(shared_state_nullary_task) x) //BOOST_NOEXCEPT
: that(x.that), f_(boost::move(x.f_))
{
x.that.reset();
}
shared_state_nullary_task& operator=(BOOST_THREAD_RV_REF(shared_state_nullary_task) x) //BOOST_NOEXCEPT
{
if (this != &x) {
that=x.that;
f_=boost::move(x.f_);
x.that.reset();
}
return *this;
}
#endif
void operator()() {
shared_ptr<shared_state<Rp> > that_ = static_pointer_cast<shared_state<Rp> >(that);
try {
that_->mark_finished_with_result(f_());
} catch(...) {
that_->mark_exceptional_finish();
}
}
~shared_state_nullary_task()
{
}
};
template<typename Fp>
struct shared_state_nullary_task<void, Fp>
{
typedef shared_ptr<shared_state_base > storage_type;
storage_type that;
Fp f_;
public:
shared_state_nullary_task(storage_type st, BOOST_THREAD_FWD_REF(Fp) f)
: that(st), f_(boost::move(f))
{};
#if ! defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
BOOST_THREAD_COPYABLE_AND_MOVABLE(shared_state_nullary_task)
shared_state_nullary_task(shared_state_nullary_task const& x) //BOOST_NOEXCEPT
: that(x.that), f_(x.f_)
{}
shared_state_nullary_task& operator=(BOOST_THREAD_COPY_ASSIGN_REF(shared_state_nullary_task) x) //BOOST_NOEXCEPT
{
if (this != &x) {
that=x.that;
f_=x.f_;
}
return *this;
}
// move
shared_state_nullary_task(BOOST_THREAD_RV_REF(shared_state_nullary_task) x) BOOST_NOEXCEPT
: that(x.that), f_(boost::move(x.f_))
{
x.that.reset();
}
shared_state_nullary_task& operator=(BOOST_THREAD_RV_REF(shared_state_nullary_task) x) BOOST_NOEXCEPT {
if (this != &x) {
that=x.that;
f_=boost::move(x.f_);
x.that.reset();
}
return *this;
}
#endif
void operator()() {
shared_ptr<shared_state<void> > that_ = static_pointer_cast<shared_state<void> >(that);
try {
f_();
that_->mark_finished_with_result();
} catch(...) {
that_->mark_exceptional_finish();
}
}
};
}
BOOST_THREAD_DCL_MOVABLE_BEG2(R,F) detail::shared_state_nullary_task<R,F> BOOST_THREAD_DCL_MOVABLE_END
namespace detail {
/////////////////////////
/// future_executor_shared_state_base
/////////////////////////
template<typename Rp>
struct future_executor_shared_state: shared_state<Rp>
{
typedef shared_state<Rp> base_type;
protected:
public:
future_executor_shared_state() {
}
template <class Fp, class Executor>
void init(Executor& ex, BOOST_THREAD_FWD_REF(Fp) f)
{
typedef typename decay<Fp>::type Cont;
this->set_executor_policy(executor_ptr_type(new executor_ref<Executor>(ex)));
shared_state_nullary_task<Rp,Cont> t(this->shared_from_this(), boost::forward<Fp>(f));
ex.submit(boost::move(t));
}
~future_executor_shared_state() {}
};
////////////////////////////////
// make_future_executor_shared_state
////////////////////////////////
template <class Rp, class Fp, class Executor>
BOOST_THREAD_FUTURE<Rp>
make_future_executor_shared_state(Executor& ex, BOOST_THREAD_FWD_REF(Fp) f) {
shared_ptr<future_executor_shared_state<Rp> >
h(new future_executor_shared_state<Rp>());
h->init(ex, boost::forward<Fp>(f));
return BOOST_THREAD_FUTURE<Rp>(h);
}
} // detail
////////////////////////////////
// template <class Executor, class F, class... ArgTypes>
// future<R> async(Executor& ex, F&&, ArgTypes&&...);
////////////////////////////////
//#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
#if defined(BOOST_THREAD_PROVIDES_INVOKE) && ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && ! defined(BOOST_NO_CXX11_HDR_TUPLE)
#if defined BOOST_THREAD_RVALUE_REFERENCES_DONT_MATCH_FUNTION_PTR
template <class Executor, class R, class... ArgTypes>
BOOST_THREAD_FUTURE<R>
async(Executor& ex, R(*f)(BOOST_THREAD_FWD_REF(ArgTypes)...), BOOST_THREAD_FWD_REF(ArgTypes)... args) {
typedef R(*F)(BOOST_THREAD_FWD_REF(ArgTypes)...);
typedef detail::invoker<typename decay<F>::type, typename decay<ArgTypes>::type...> BF;
typedef typename BF::result_type Rp;
return BOOST_THREAD_MAKE_RV_REF(boost::detail::make_future_executor_shared_state<Rp>(ex,
BF(
f
, thread_detail::decay_copy(boost::forward<ArgTypes>(args))...
)
));
}
#endif // defined BOOST_THREAD_RVALUE_REFERENCES_DONT_MATCH_FUNTION_PTR
template <class Executor, class F, class ...ArgTypes>
BOOST_THREAD_FUTURE<typename boost::result_of<typename decay<F>::type(
typename decay<ArgTypes>::type...
)>::type>
async(Executor& ex, BOOST_THREAD_FWD_REF(F) f, BOOST_THREAD_FWD_REF(ArgTypes)... args) {
typedef detail::invoker<typename decay<F>::type, typename decay<ArgTypes>::type...> BF;
typedef typename BF::result_type Rp;
return BOOST_THREAD_MAKE_RV_REF(boost::detail::make_future_executor_shared_state<Rp>(ex,
BF(
thread_detail::decay_copy(boost::forward<F>(f))
, thread_detail::decay_copy(boost::forward<ArgTypes>(args))...
)
));
}
#else // ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
#if defined BOOST_THREAD_RVALUE_REFERENCES_DONT_MATCH_FUNTION_PTR
template <class Executor, class R>
BOOST_THREAD_FUTURE<R>
async(Executor& ex, R(*f)()) {
typedef R(*F)();
typedef detail::invoker<F> BF;
typedef typename BF::result_type Rp;
return BOOST_THREAD_MAKE_RV_REF(boost::detail::make_future_executor_shared_state<Rp>(ex,
BF(
f
)
));
}
template <class Executor, class R, class A1>
BOOST_THREAD_FUTURE<R>
async(Executor& ex, R(*f)(BOOST_THREAD_FWD_REF(A1)), BOOST_THREAD_FWD_REF(A1) a1) {
typedef R(*F)(BOOST_THREAD_FWD_REF(A1));
typedef detail::invoker<F, typename decay<A1>::type> BF;
typedef typename BF::result_type Rp;
return BOOST_THREAD_MAKE_RV_REF(boost::detail::make_future_executor_shared_state<Rp>(ex,
BF(
f
, thread_detail::decay_copy(boost::forward<A1>(a1))
)
));
}
#endif // defined BOOST_THREAD_RVALUE_REFERENCES_DONT_MATCH_FUNTION_PTR
template <class Executor, class F>
BOOST_THREAD_FUTURE<typename boost::result_of<typename decay<F>::type()>::type>
async(Executor& ex, BOOST_THREAD_FWD_REF(F) f) {
typedef detail::invoker<typename decay<F>::type> BF;
typedef typename BF::result_type Rp;
return boost::detail::make_future_executor_shared_state<Rp>(ex,
BF(
thread_detail::decay_copy(boost::forward<F>(f))
)
);
}
template <class Executor, class F, class A1>
BOOST_THREAD_FUTURE<typename boost::result_of<typename decay<F>::type(
typename decay<A1>::type
)>::type>
async(Executor& ex, BOOST_THREAD_FWD_REF(F) f, BOOST_THREAD_FWD_REF(A1) a1) {
typedef detail::invoker<typename decay<F>::type, typename decay<A1>::type> BF;
typedef typename BF::result_type Rp;
return BOOST_THREAD_MAKE_RV_REF(boost::detail::make_future_executor_shared_state<Rp>(ex,
BF(
thread_detail::decay_copy(boost::forward<F>(f))
, thread_detail::decay_copy(boost::forward<A1>(a1))
)
));
}
template <class Executor, class F, class A1, class A2>
BOOST_THREAD_FUTURE<typename boost::result_of<typename decay<F>::type(
typename decay<A1>::type, typename decay<A2>::type
)>::type>
async(Executor& ex, BOOST_THREAD_FWD_REF(F) f, BOOST_THREAD_FWD_REF(A1) a1, BOOST_THREAD_FWD_REF(A2) a2) {
typedef detail::invoker<typename decay<F>::type, typename decay<A1>::type, typename decay<A2>::type> BF;
typedef typename BF::result_type Rp;
return BOOST_THREAD_MAKE_RV_REF(boost::detail::make_future_executor_shared_state<Rp>(ex,
BF(
thread_detail::decay_copy(boost::forward<F>(f))
, thread_detail::decay_copy(boost::forward<A1>(a1))
, thread_detail::decay_copy(boost::forward<A2>(a2))
)
));
}
#endif //! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
#endif
////////////////////////////////
// template <class F, class... ArgTypes>
// future<R> async(F&&, ArgTypes&&...);
////////////////////////////////
#if defined BOOST_THREAD_RVALUE_REFERENCES_DONT_MATCH_FUNTION_PTR
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
template <class R, class... ArgTypes>
BOOST_THREAD_FUTURE<R>
async(R(*f)(BOOST_THREAD_FWD_REF(ArgTypes)...), BOOST_THREAD_FWD_REF(ArgTypes)... args) {
return BOOST_THREAD_MAKE_RV_REF(async(launch(launch::any), f, boost::forward<ArgTypes>(args)...));
}
#else
template <class R>
BOOST_THREAD_FUTURE<R>
async(R(*f)()) {
return BOOST_THREAD_MAKE_RV_REF(async(launch(launch::any), f));
}
#endif
#endif
#if defined(BOOST_THREAD_PROVIDES_VARIADIC_THREAD)
template <class F, class ...ArgTypes>
BOOST_THREAD_FUTURE<typename boost::result_of<typename decay<F>::type(
typename decay<ArgTypes>::type...
)>::type>
async(BOOST_THREAD_FWD_REF(F) f, BOOST_THREAD_FWD_REF(ArgTypes)... args) {
return BOOST_THREAD_MAKE_RV_REF(async(launch(launch::any), boost::forward<F>(f), boost::forward<ArgTypes>(args)...));
}
#else
template <class F>
BOOST_THREAD_FUTURE<typename boost::result_of<F()>::type>
async(BOOST_THREAD_FWD_REF(F) f) {
return BOOST_THREAD_MAKE_RV_REF(async(launch(launch::any), boost::forward<F>(f)));
}
#endif
////////////////////////////////
// make_future deprecated
////////////////////////////////
template <typename T>
BOOST_THREAD_FUTURE<typename decay<T>::type> make_future(BOOST_THREAD_FWD_REF(T) value) {
typedef typename decay<T>::type future_value_type;
promise<future_value_type> p;
p.set_value(boost::forward<future_value_type>(value));
return BOOST_THREAD_MAKE_RV_REF(p.get_future());
}
#if defined BOOST_THREAD_USES_MOVE
inline BOOST_THREAD_FUTURE<void> make_future() {
promise<void> p;
p.set_value();
return BOOST_THREAD_MAKE_RV_REF(p.get_future());
}
#endif
////////////////////////////////
// make_ready_future
////////////////////////////////
namespace detail {
template <class T>
struct deduced_type_impl
{
typedef T type;
};
template <class T>
struct deduced_type_impl<reference_wrapper<T> const>
{
typedef T& type;
};
template <class T>
struct deduced_type_impl<reference_wrapper<T> >
{
typedef T& type;
};
#if __cplusplus > 201103L
template <class T>
struct deduced_type_impl<std::reference_wrapper<T> >
{
typedef T& type;
};
#endif
template <class T>
struct deduced_type
{
typedef typename detail::deduced_type_impl<typename decay<T>::type>::type type;
};
}
#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template <int = 0, int..., class T>
#else
template <class T>
#endif
BOOST_THREAD_FUTURE<typename detail::deduced_type<T>::type> make_ready_future(BOOST_THREAD_FWD_REF(T) value) {
typedef typename detail::deduced_type<T>::type future_value_type;
promise<future_value_type> p;
p.set_value(boost::forward<T>(value));
return BOOST_THREAD_MAKE_RV_REF(p.get_future());
}
// explicit overloads
template <class T>
BOOST_THREAD_FUTURE<T> make_ready_future(typename remove_reference<T>::type & x)
{
promise<T> p;
p.set_value(x);
return p.get_future();
}
template <class T>
BOOST_THREAD_FUTURE<T> make_ready_future(BOOST_THREAD_FWD_REF(typename remove_reference<T>::type) x)
{
promise<T> p;
p.set_value(forward<typename remove_reference<T>::type>(x));
return p.get_future();
}
// variadic overload
#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template <class T, class ...Args>
BOOST_THREAD_FUTURE<T> make_ready_future(Args&&... args)
{
promise<T> p;
p.emplace(forward<Args>(args)...);
return p.get_future();
}
#endif
template <typename T, typename T1>
BOOST_THREAD_FUTURE<T> make_ready_no_decay_future(T1 value) {
typedef T future_value_type;
promise<future_value_type> p;
p.set_value(value);
return BOOST_THREAD_MAKE_RV_REF(p.get_future());
}
#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) || defined BOOST_THREAD_USES_MOVE
inline BOOST_THREAD_FUTURE<void> make_ready_future() {
promise<void> p;
p.set_value();
return p.get_future();
}
#endif
template <typename T>
BOOST_THREAD_FUTURE<T> make_exceptional_future(exception_ptr ex) {
promise<T> p;
p.set_exception(ex);
return BOOST_THREAD_MAKE_RV_REF(p.get_future());
}
template <typename T, typename E>
BOOST_THREAD_FUTURE<T> make_exceptional_future(E ex) {
promise<T> p;
p.set_exception(boost::copy_exception(ex));
return BOOST_THREAD_MAKE_RV_REF(p.get_future());
}
template <typename T>
BOOST_THREAD_FUTURE<T> make_exceptional_future() {
promise<T> p;
p.set_exception(boost::current_exception());
return BOOST_THREAD_MAKE_RV_REF(p.get_future());
}
template <typename T>
BOOST_THREAD_FUTURE<T> make_ready_future(exception_ptr ex) {
return make_exceptional_future<T>(ex);
}
#if 0
template<typename CLOSURE>
make_future(CLOSURE closure) -> BOOST_THREAD_FUTURE<decltype(closure())> {
typedef decltype(closure()) T;
promise<T> p;
try {
p.set_value(closure());
} catch(...) {
p.set_exception(std::current_exception());
}
return BOOST_THREAD_MAKE_RV_REF(p.get_future());
}
#endif
////////////////////////////////
// make_shared_future deprecated
////////////////////////////////
template <typename T>
shared_future<typename decay<T>::type> make_shared_future(BOOST_THREAD_FWD_REF(T) value) {
typedef typename decay<T>::type future_type;
promise<future_type> p;
p.set_value(boost::forward<T>(value));
return BOOST_THREAD_MAKE_RV_REF(p.get_future().share());
}
inline shared_future<void> make_shared_future() {
promise<void> p;
return BOOST_THREAD_MAKE_RV_REF(p.get_future().share());
}
////////////////////////////////
// detail::future_async_continuation_shared_state
////////////////////////////////
#if defined BOOST_THREAD_PROVIDES_FUTURE_CONTINUATION
namespace detail
{
//////////////////////
// detail::continuation_shared_state
//////////////////////
template<typename F, typename Rp, typename Fp, class ShSt=shared_state<Rp> >
struct continuation_shared_state: ShSt
{
F parent;
Fp continuation;
public:
continuation_shared_state(BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c)
: parent(boost::move(f)),
continuation(boost::move(c))
{
}
void init(boost::unique_lock<boost::mutex> &lock)
{
parent.future_->set_continuation_ptr(this->shared_from_this(), lock);
}
void call() {
try {
this->mark_finished_with_result(this->continuation(boost::move(this->parent)));
} catch(...) {
this->mark_exceptional_finish();
}
// make sure parent is really cleared to prevent memory "leaks"
this->parent = F();
}
void call(boost::unique_lock<boost::mutex>& lck) {
try {
relocker relock(lck);
// neither continuation nor parent are protected by the lock - call() must only
// be called once, and no one else must modify it.
Rp res = this->continuation(boost::move(this->parent));
// make sure parent is really cleared to prevent memory "leaks"
this->parent = F();
relock.lock();
this->mark_finished_with_result_internal(boost::move(res), lck);
} catch (...) {
this->mark_exceptional_finish_internal(current_exception(), lck);
// make sure parent is really cleared to prevent memory "leaks"
relocker relock(lck);
this->parent = F();
}
}
static void run(shared_ptr<boost::detail::shared_state_base> that_)
{
continuation_shared_state* that = static_cast<continuation_shared_state*>(that_.get());
that->call();
}
~continuation_shared_state() {}
};
template<typename F, typename Fp, class ShSt>
struct continuation_shared_state<F, void, Fp, ShSt>: ShSt
{
F parent;
Fp continuation;
public:
continuation_shared_state(BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c)
: parent(boost::move(f)),
continuation(boost::move(c))
{
}
void init(boost::unique_lock<boost::mutex> &lock)
{
parent.future_->set_continuation_ptr(this->shared_from_this(), lock);
}
void call()
{
try {
this->continuation(boost::move(this->parent));
this->mark_finished_with_result();
} catch(...) {
this->mark_exceptional_finish();
}
// make sure parent is really cleared to prevent memory "leaks"
this->parent = F();
}
void call(boost::unique_lock<boost::mutex>& lck) {
try {
{
relocker relock(lck);
// neither continuation nor parent are protected by the lock - call() must only
// be called once, and no one else must modify it.
this->continuation(boost::move(this->parent));
// make sure parent is really cleared to prevent memory "leaks"
this->parent = F();
}
this->mark_finished_with_result_internal(lck);
} catch (...) {
this->mark_exceptional_finish_internal(current_exception(), lck);
// make sure parent is really cleared to prevent memory "leaks"
relocker relock(lck);
this->parent = F();
}
}
static void run(shared_ptr<boost::detail::shared_state_base> that_)
{
continuation_shared_state* that = static_cast<continuation_shared_state*>(that_.get());
that->call();
}
~continuation_shared_state() {}
};
/////////////////////////
/// future_async_continuation_shared_state
/////////////////////////
template<typename F, typename Rp, typename Fp>
struct future_async_continuation_shared_state: continuation_shared_state<F,Rp,Fp,future_async_shared_state_base<Rp> >
{
typedef continuation_shared_state<F,Rp,Fp,future_async_shared_state_base<Rp> > base_type;
public:
future_async_continuation_shared_state(BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c)
: base_type(boost::move(f), boost::forward<Fp>(c))
{ }
void launch_continuation() {
#if defined BOOST_THREAD_FUTURE_BLOCKING
boost::lock_guard<boost::mutex> lk(this->mutex);
this->thr_ = boost::thread(&future_async_continuation_shared_state::run, static_shared_from_this(this));
#else
boost::thread(&base_type::run, static_shared_from_this(this)).detach();
#endif
}
};
/////////////////////////
/// future_sync_continuation_shared_state
/////////////////////////
template<typename F, typename Rp, typename Fp>
struct future_sync_continuation_shared_state: continuation_shared_state<F,Rp,Fp,shared_state<Rp> >
{
typedef continuation_shared_state<F,Rp,Fp,shared_state<Rp> > base_type;
public:
future_sync_continuation_shared_state(BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c)
: base_type(boost::move(f), boost::forward<Fp>(c))
{ }
void launch_continuation() {
this->call();
}
};
/////////////////////////
/// future_executor_continuation_shared_state
/////////////////////////
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
template <typename FutureExecutorContinuationSharedState>
struct run_it {
shared_ptr<FutureExecutorContinuationSharedState> that_;
#if ! defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
BOOST_THREAD_COPYABLE_AND_MOVABLE(run_it)
run_it(run_it const& x) //BOOST_NOEXCEPT
: that_(x.that_)
{}
run_it& operator=(BOOST_THREAD_COPY_ASSIGN_REF(run_it) x) //BOOST_NOEXCEPT
{
if (this != &x) {
that_=x.that_;
}
return *this;
}
// move
run_it(BOOST_THREAD_RV_REF(run_it) x) BOOST_NOEXCEPT
: that_(x.that_)
{
x.that_.reset();
}
run_it& operator=(BOOST_THREAD_RV_REF(run_it) x) BOOST_NOEXCEPT {
if (this != &x) {
that_=x.that;
x.that_.reset();
}
return *this;
}
#endif
run_it(shared_ptr<FutureExecutorContinuationSharedState> that) : that_ (that) {}
void operator()()
{
that_->run(that_);
}
};
}
BOOST_THREAD_DCL_MOVABLE_BEG(F) detail::run_it<F> BOOST_THREAD_DCL_MOVABLE_END
namespace detail {
template<typename F, typename Rp, typename Fp>
struct future_executor_continuation_shared_state: continuation_shared_state<F,Rp,Fp>
{
typedef continuation_shared_state<F,Rp,Fp> base_type;
public:
future_executor_continuation_shared_state(BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c)
: base_type(boost::move(f), boost::forward<Fp>(c))
{
}
template <class Ex>
void init(boost::unique_lock<boost::mutex> &lk, Ex& ex)
{
this->set_executor_policy(executor_ptr_type(new executor_ref<Ex>(ex)), lk);
this->base_type::init(lk);
}
void launch_continuation() {
run_it<base_type> fct(static_shared_from_this(this));
this->get_executor()->submit(boost::move(fct));
}
~future_executor_continuation_shared_state() {}
};
#endif
/////////////////////////
/// shared_future_async_continuation_shared_state
/////////////////////////
template<typename F, typename Rp, typename Fp>
struct shared_future_async_continuation_shared_state: continuation_shared_state<F,Rp,Fp,future_async_shared_state_base<Rp> >
{
typedef continuation_shared_state<F,Rp,Fp,future_async_shared_state_base<Rp> > base_type;
public:
shared_future_async_continuation_shared_state(F f, BOOST_THREAD_FWD_REF(Fp) c)
: base_type(boost::move(f), boost::forward<Fp>(c))
{
}
void launch_continuation() {
#if defined BOOST_THREAD_FUTURE_BLOCKING
boost::lock_guard<boost::mutex> lk(this->mutex);
this->thr_ = boost::thread(&base_type::run, static_shared_from_this(this));
#else
boost::thread(&base_type::run, static_shared_from_this(this)).detach();
#endif
}
};
/////////////////////////
/// shared_future_async_continuation_shared_state
/////////////////////////
template<typename F, typename Rp, typename Fp>
struct shared_future_sync_continuation_shared_state: continuation_shared_state<F,Rp,Fp,shared_state<Rp> >
{
typedef continuation_shared_state<F,Rp,Fp,shared_state<Rp> > base_type;
public:
shared_future_sync_continuation_shared_state(F f, BOOST_THREAD_FWD_REF(Fp) c)
: base_type(boost::move(f), boost::forward<Fp>(c))
{
}
void launch_continuation() {
this->call();
}
};
/////////////////////////
/// shared_future_executor_continuation_shared_state
/////////////////////////
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
template<typename F, typename Rp, typename Fp>
struct shared_future_executor_continuation_shared_state: continuation_shared_state<F,Rp,Fp>
{
typedef continuation_shared_state<F,Rp,Fp> base_type;
public:
shared_future_executor_continuation_shared_state(F f, BOOST_THREAD_FWD_REF(Fp) c)
: base_type(boost::move(f), boost::forward<Fp>(c))
{
}
template <class Ex>
void init(boost::unique_lock<boost::mutex> &lk, Ex& ex)
{
this->set_executor_policy(executor_ptr_type(new executor_ref<Ex>(ex)), lk);
this->base_type::init(lk);
}
void launch_continuation() {
run_it<base_type> fct(static_shared_from_this(this));
this->get_executor()->submit(boost::move(fct));
}
~shared_future_executor_continuation_shared_state() {}
};
#endif
//////////////////////////
/// future_deferred_continuation_shared_state
//////////////////////////
template<typename F, typename Rp, typename Fp>
struct future_deferred_continuation_shared_state: continuation_shared_state<F,Rp,Fp>
{
typedef continuation_shared_state<F,Rp,Fp> base_type;
public:
future_deferred_continuation_shared_state(BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c)
: base_type(boost::move(f), boost::forward<Fp>(c))
{
this->set_deferred();
}
virtual void execute(boost::unique_lock<boost::mutex>& lk) {
this->parent.wait();
this->call(lk);
}
virtual void launch_continuation() { }
};
//////////////////////////
/// shared_future_deferred_continuation_shared_state
//////////////////////////
template<typename F, typename Rp, typename Fp>
struct shared_future_deferred_continuation_shared_state: continuation_shared_state<F,Rp,Fp>
{
typedef continuation_shared_state<F,Rp,Fp> base_type;
public:
shared_future_deferred_continuation_shared_state(F f, BOOST_THREAD_FWD_REF(Fp) c)
: base_type(boost::move(f), boost::forward<Fp>(c))
{
this->set_deferred();
}
virtual void execute(boost::unique_lock<boost::mutex>& lk) {
this->parent.wait();
this->call(lk);
}
virtual void launch_continuation() { }
};
////////////////////////////////
// make_future_deferred_continuation_shared_state
////////////////////////////////
template<typename F, typename Rp, typename Fp>
BOOST_THREAD_FUTURE<Rp>
make_future_deferred_continuation_shared_state(
boost::unique_lock<boost::mutex> &lock,
BOOST_THREAD_RV_REF(F) f, BOOST_THREAD_FWD_REF(Fp) c) {
typedef typename decay<Fp>::type Cont;
shared_ptr<future_deferred_continuation_shared_state<F, Rp, Cont> >
h(new future_deferred_continuation_shared_state<F, Rp, Cont>(boost::move(f), boost::forward<Fp>(c)));
h->init(lock);
return BOOST_THREAD_FUTURE<Rp>(h);
}
////////////////////////////////
// make_future_async_continuation_shared_state
////////////////////////////////
template<typename F, typename Rp, typename Fp>
BOOST_THREAD_FUTURE<Rp>
make_future_async_continuation_shared_state(
boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f,
BOOST_THREAD_FWD_REF(Fp) c) {
typedef typename decay<Fp>::type Cont;
shared_ptr<future_async_continuation_shared_state<F,Rp, Cont> >
h(new future_async_continuation_shared_state<F,Rp, Cont>(boost::move(f), boost::forward<Fp>(c)));
h->init(lock);
return BOOST_THREAD_FUTURE<Rp>(h);
}
////////////////////////////////
// make_future_sync_continuation_shared_state
////////////////////////////////
template<typename F, typename Rp, typename Fp>
BOOST_THREAD_FUTURE<Rp>
make_future_sync_continuation_shared_state(
boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f,
BOOST_THREAD_FWD_REF(Fp) c) {
typedef typename decay<Fp>::type Cont;
shared_ptr<future_sync_continuation_shared_state<F,Rp, Cont> >
h(new future_sync_continuation_shared_state<F,Rp, Cont>(boost::move(f), boost::forward<Fp>(c)));
h->init(lock);
return BOOST_THREAD_FUTURE<Rp>(h);
}
////////////////////////////////
// make_future_executor_continuation_shared_state
////////////////////////////////
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
template<typename Ex, typename F, typename Rp, typename Fp>
BOOST_THREAD_FUTURE<Rp>
make_future_executor_continuation_shared_state(Ex& ex,
boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f,
BOOST_THREAD_FWD_REF(Fp) c) {
typedef typename decay<Fp>::type Cont;
shared_ptr<future_executor_continuation_shared_state<F,Rp, Cont> >
h(new future_executor_continuation_shared_state<F,Rp, Cont>(boost::move(f), boost::forward<Fp>(c)));
h->init(lock, ex);
return BOOST_THREAD_FUTURE<Rp>(h);
}
#endif
////////////////////////////////
// make_shared_future_deferred_continuation_shared_state
////////////////////////////////
template<typename F, typename Rp, typename Fp>
BOOST_THREAD_FUTURE<Rp>
make_shared_future_deferred_continuation_shared_state(
boost::unique_lock<boost::mutex> &lock,
F f, BOOST_THREAD_FWD_REF(Fp) c) {
typedef typename decay<Fp>::type Cont;
shared_ptr<shared_future_deferred_continuation_shared_state<F, Rp, Cont> >
h(new shared_future_deferred_continuation_shared_state<F, Rp, Cont>(f, boost::forward<Fp>(c)));
h->init(lock);
return BOOST_THREAD_FUTURE<Rp>(h);
}
////////////////////////////////
// make_shared_future_async_continuation_shared_state
////////////////////////////////
template<typename F, typename Rp, typename Fp>
BOOST_THREAD_FUTURE<Rp>
make_shared_future_async_continuation_shared_state(
boost::unique_lock<boost::mutex> &lock, F f,
BOOST_THREAD_FWD_REF(Fp) c) {
typedef typename decay<Fp>::type Cont;
shared_ptr<shared_future_async_continuation_shared_state<F,Rp, Cont> >
h(new shared_future_async_continuation_shared_state<F,Rp, Cont>(f, boost::forward<Fp>(c)));
h->init(lock);
return BOOST_THREAD_FUTURE<Rp>(h);
}
////////////////////////////////
// make_shared_future_sync_continuation_shared_state
////////////////////////////////
template<typename F, typename Rp, typename Fp>
BOOST_THREAD_FUTURE<Rp>
make_shared_future_sync_continuation_shared_state(
boost::unique_lock<boost::mutex> &lock, F f,
BOOST_THREAD_FWD_REF(Fp) c) {
typedef typename decay<Fp>::type Cont;
shared_ptr<shared_future_sync_continuation_shared_state<F,Rp, Cont> >
h(new shared_future_sync_continuation_shared_state<F,Rp, Cont>(f, boost::forward<Fp>(c)));
h->init(lock);
return BOOST_THREAD_FUTURE<Rp>(h);
}
////////////////////////////////
// make_shared_future_executor_continuation_shared_state
////////////////////////////////
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
template<typename Ex, typename F, typename Rp, typename Fp>
BOOST_THREAD_FUTURE<Rp>
make_shared_future_executor_continuation_shared_state(Ex& ex,
boost::unique_lock<boost::mutex> &lock, F f,
BOOST_THREAD_FWD_REF(Fp) c) {
typedef typename decay<Fp>::type Cont;
shared_ptr<shared_future_executor_continuation_shared_state<F, Rp, Cont> >
h(new shared_future_executor_continuation_shared_state<F, Rp, Cont>(f, boost::forward<Fp>(c)));
h->init(lock, ex);
return BOOST_THREAD_FUTURE<Rp>(h);
}
#endif
}
////////////////////////////////
// template<typename F>
// auto future<R>::then(launch policy, F&& func) -> BOOST_THREAD_FUTURE<decltype(func(*this))>;
////////////////////////////////
template <typename R>
template <typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(BOOST_THREAD_FUTURE<R>)>::type>
BOOST_THREAD_FUTURE<R>::then(launch policy, BOOST_THREAD_FWD_REF(F) func) {
typedef typename boost::result_of<F(BOOST_THREAD_FUTURE<R>)>::type future_type;
BOOST_THREAD_ASSERT_PRECONDITION(this->future_!=0, future_uninitialized());
// keep state alive as we move ourself but hold the lock
shared_ptr<detail::shared_state_base> sentinel(this->future_);
boost::unique_lock<boost::mutex> lock(sentinel->mutex);
if (underlying_cast<int>(policy) & int(launch::async)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_async_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
} else if (underlying_cast<int>(policy) & int(launch::deferred)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_deferred_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
} else if (underlying_cast<int>(policy) & int(launch::executor)) {
assert(this->future_->get_executor());
typedef executor Ex;
Ex& ex = *(this->future_->get_executor());
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_executor_continuation_shared_state<Ex, BOOST_THREAD_FUTURE<R>, future_type>(ex,
lock, boost::move(*this), boost::forward<F>(func)
)));
#endif
} else if (underlying_cast<int>(policy) & int(launch::inherit)) {
launch policy_ = this->launch_policy(lock);
if (underlying_cast<int>(policy_) & int(launch::async)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_async_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
} else if (underlying_cast<int>(policy_) & int(launch::deferred)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_deferred_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
} else if (underlying_cast<int>(policy_) & int(launch::executor)) {
assert(this->future_->get_executor());
typedef executor Ex;
Ex& ex = *(this->future_->get_executor());
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_executor_continuation_shared_state<Ex, BOOST_THREAD_FUTURE<R>, future_type>(ex,
lock, boost::move(*this), boost::forward<F>(func)
)));
#endif
} else {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_async_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
}
} else {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_async_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
}
}
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
////////////////////////////////
// template<typename Ex, typename F>
// auto future<future<R2> >::then(Ex&, F&& func) -> BOOST_THREAD_FUTURE<decltype(func(*this))>;
////////////////////////////////
template <typename R>
template <typename Ex, typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(BOOST_THREAD_FUTURE<R>)>::type>
BOOST_THREAD_FUTURE<R>::then(Ex& ex, BOOST_THREAD_FWD_REF(F) func) {
typedef typename boost::result_of<F(BOOST_THREAD_FUTURE<R>)>::type future_type;
BOOST_THREAD_ASSERT_PRECONDITION(this->future_!=0, future_uninitialized());
// keep state alive as we move ourself but hold the lock
shared_ptr<detail::shared_state_base> sentinel(this->future_);
boost::unique_lock<boost::mutex> lock(sentinel->mutex);
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_executor_continuation_shared_state<Ex, BOOST_THREAD_FUTURE<R>, future_type>(ex,
lock, boost::move(*this), boost::forward<F>(func)
)));
}
#endif
////////////////////////////////
// template<typename F>
// auto future<future<R2> >::then(F&& func) -> BOOST_THREAD_FUTURE<decltype(func(*this))>;
////////////////////////////////
template <typename R>
template <typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(BOOST_THREAD_FUTURE<R>)>::type>
BOOST_THREAD_FUTURE<R>::then(BOOST_THREAD_FWD_REF(F) func) {
#ifndef BOOST_THREAD_CONTINUATION_SYNC
return this->then(this->launch_policy(), boost::forward<F>(func));
#else
typedef typename boost::result_of<F(BOOST_THREAD_FUTURE<R>)>::type future_type;
BOOST_THREAD_ASSERT_PRECONDITION(this->future_!=0, future_uninitialized());
// keep state alive as we move ourself but hold the lock
shared_ptr<detail::shared_state_base> sentinel(this->future_);
boost::unique_lock<boost::mutex> lock(sentinel->mutex);
launch policy = this->launch_policy(lock);
if (underlying_cast<int>(policy) & int(launch::deferred)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_deferred_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
} else {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_async_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
}
#endif
}
////////////////////////////////
// template<typename F>
// auto future<future<R2> >::then(launch, F&& func) -> BOOST_THREAD_FUTURE<decltype(func(*this))>;
////////////////////////////////
template <typename R2>
template <typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(BOOST_THREAD_FUTURE<BOOST_THREAD_FUTURE<R2> >)>::type>
BOOST_THREAD_FUTURE<BOOST_THREAD_FUTURE<R2> >::then(launch policy, BOOST_THREAD_FWD_REF(F) func) {
typedef BOOST_THREAD_FUTURE<R2> R;
typedef typename boost::result_of<F(BOOST_THREAD_FUTURE<R>)>::type future_type;
BOOST_THREAD_ASSERT_PRECONDITION(this->future_!=0, future_uninitialized());
// keep state alive as we move ourself but hold the lock
shared_ptr<detail::shared_state_base> sentinel(this->future_);
boost::unique_lock<boost::mutex> lock(sentinel->mutex);
if (underlying_cast<int>(policy) & int(launch::async)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_async_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
} else if (underlying_cast<int>(policy) & int(launch::deferred)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_deferred_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
} else if (underlying_cast<int>(policy) & int(launch::sync)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_sync_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
} else if (underlying_cast<int>(policy) & int(launch::executor)) {
assert(this->future_->get_executor());
typedef executor Ex;
Ex& ex = *(this->future_->get_executor());
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_executor_continuation_shared_state<Ex, BOOST_THREAD_FUTURE<R>, future_type>(ex,
lock, boost::move(*this), boost::forward<F>(func)
)));
#endif
} else if (underlying_cast<int>(policy) & int(launch::inherit)) {
launch policy_ = this->launch_policy(lock);
if (underlying_cast<int>(policy_) & int(launch::async)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_async_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
} else if (underlying_cast<int>(policy_) & int(launch::deferred)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_deferred_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
} else if (underlying_cast<int>(policy_) & int(launch::sync)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_sync_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
} else if (underlying_cast<int>(policy_) & int(launch::executor)) {
assert(this->future_->get_executor());
typedef executor Ex;
Ex& ex = *(this->future_->get_executor());
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_executor_continuation_shared_state<Ex, BOOST_THREAD_FUTURE<R>, future_type>(ex,
lock, boost::move(*this), boost::forward<F>(func)
)));
#endif
} else {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_async_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
}
} else {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_async_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
}
}
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
////////////////////////////////
// template<typename Ex, typename F>
// auto future<future<R2> >::then(Ex&, F&& func) -> BOOST_THREAD_FUTURE<decltype(func(*this))>;
////////////////////////////////
template <typename R2>
template <typename Ex, typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(BOOST_THREAD_FUTURE<BOOST_THREAD_FUTURE<R2> >)>::type>
BOOST_THREAD_FUTURE<BOOST_THREAD_FUTURE<R2> >::then(Ex& ex, BOOST_THREAD_FWD_REF(F) func) {
typedef BOOST_THREAD_FUTURE<R2> R;
typedef typename boost::result_of<F(BOOST_THREAD_FUTURE<R>)>::type future_type;
BOOST_THREAD_ASSERT_PRECONDITION(this->future_!=0, future_uninitialized());
// keep state alive as we move ourself but hold the lock
shared_ptr<detail::shared_state_base> sentinel(this->future_);
boost::unique_lock<boost::mutex> lock(sentinel->mutex);
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_executor_continuation_shared_state<Ex, BOOST_THREAD_FUTURE<R>, future_type>(ex,
lock, boost::move(*this), boost::forward<F>(func)
)));
}
#endif
////////////////////////////////
// template<typename F>
// auto future<future<R2> >::then(F&& func) -> BOOST_THREAD_FUTURE<decltype(func(*this))>;
////////////////////////////////
template <typename R2>
template <typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(BOOST_THREAD_FUTURE<BOOST_THREAD_FUTURE<R2> >)>::type>
BOOST_THREAD_FUTURE<BOOST_THREAD_FUTURE<R2> >::then(BOOST_THREAD_FWD_REF(F) func) {
#ifndef BOOST_THREAD_CONTINUATION_SYNC
return this->then(this->launch_policy(), boost::forward<F>(func));
#else
typedef BOOST_THREAD_FUTURE<R2> R;
typedef typename boost::result_of<F(BOOST_THREAD_FUTURE<R>)>::type future_type;
BOOST_THREAD_ASSERT_PRECONDITION(this->future_!=0, future_uninitialized());
// keep state alive as we move ourself but hold the lock
shared_ptr<detail::shared_state_base> sentinel(this->future_);
boost::unique_lock<boost::mutex> lock(sentinel->mutex);
launch policy = this->launch_policy(lock);
if (underlying_cast<int>(policy) & int(launch::deferred)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_deferred_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
} else {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_future_sync_continuation_shared_state<BOOST_THREAD_FUTURE<R>, future_type>(
lock, boost::move(*this), boost::forward<F>(func)
)));
}
#endif
}
////////////////////////////////
// template<typename F>
// auto shared_future<R>::then(launch policy, F&& func) -> BOOST_THREAD_FUTURE<decltype(func(*this))>;
////////////////////////////////
template <typename R>
template <typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(shared_future<R>)>::type>
shared_future<R>::then(launch policy, BOOST_THREAD_FWD_REF(F) func) const
{
typedef typename boost::result_of<F(shared_future<R>)>::type future_type;
BOOST_THREAD_ASSERT_PRECONDITION(this->future_!=0, future_uninitialized());
boost::unique_lock<boost::mutex> lock(this->future_->mutex);
if (underlying_cast<int>(policy) & int(launch::async)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_shared_future_async_continuation_shared_state<shared_future<R>, future_type>(
lock, *this, boost::forward<F>(func)
)));
} else if (underlying_cast<int>(policy) & int(launch::deferred)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_shared_future_deferred_continuation_shared_state<shared_future<R>, future_type>(
lock, *this, boost::forward<F>(func)
)));
} else if (underlying_cast<int>(policy) & int(launch::sync)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_shared_future_sync_continuation_shared_state<shared_future<R>, future_type>(
lock, *this, boost::forward<F>(func)
)));
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
} else if (underlying_cast<int>(policy) & int(launch::executor)) {
typedef executor Ex;
Ex& ex = *(this->future_->get_executor());
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_shared_future_executor_continuation_shared_state<Ex, shared_future<R>, future_type>(ex,
lock, *this, boost::forward<F>(func)
)));
#endif
} else if (underlying_cast<int>(policy) & int(launch::inherit)) {
launch policy_ = this->launch_policy(lock);
if (underlying_cast<int>(policy_) & int(launch::async)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_shared_future_async_continuation_shared_state<shared_future<R>, future_type>(
lock, *this, boost::forward<F>(func)
)));
} else if (underlying_cast<int>(policy_) & int(launch::deferred)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_shared_future_deferred_continuation_shared_state<shared_future<R>, future_type>(
lock, *this, boost::forward<F>(func)
)));
} else if (underlying_cast<int>(policy_) & int(launch::sync)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_shared_future_sync_continuation_shared_state<shared_future<R>, future_type>(
lock, *this, boost::forward<F>(func)
)));
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
} else if (underlying_cast<int>(policy_) & int(launch::executor)) {
typedef executor Ex;
Ex& ex = *(this->future_->get_executor());
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_shared_future_executor_continuation_shared_state<Ex, shared_future<R>, future_type>(ex,
lock, *this, boost::forward<F>(func)
)));
#endif
} else {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_shared_future_async_continuation_shared_state<shared_future<R>, future_type>(
lock, *this, boost::forward<F>(func)
)));
}
} else {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_shared_future_async_continuation_shared_state<shared_future<R>, future_type>(
lock, *this, boost::forward<F>(func)
)));
}
}
#ifdef BOOST_THREAD_PROVIDES_EXECUTORS
////////////////////////////////
// template<typename Ex, typename F>
// auto shared_future<R>::then(Ex&, F&& func) -> BOOST_THREAD_FUTURE<decltype(func(*this))>;
////////////////////////////////
template <typename R>
template <typename Ex, typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(shared_future<R>)>::type>
shared_future<R>::then(Ex& ex, BOOST_THREAD_FWD_REF(F) func) const
{
typedef typename boost::result_of<F(shared_future<R>)>::type future_type;
BOOST_THREAD_ASSERT_PRECONDITION(this->future_!=0, future_uninitialized());
boost::unique_lock<boost::mutex> lock(this->future_->mutex);
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_shared_future_executor_continuation_shared_state<Ex, shared_future<R>, future_type>(ex,
lock, *this, boost::forward<F>(func)
)));
}
#endif
////////////////////////////////
// template<typename F>
// auto shared_future<R>::then(F&& func) -> BOOST_THREAD_FUTURE<decltype(func(*this))>;
////////////////////////////////
template <typename R>
template <typename F>
inline BOOST_THREAD_FUTURE<typename boost::result_of<F(shared_future<R>)>::type>
shared_future<R>::then(BOOST_THREAD_FWD_REF(F) func) const {
#ifndef BOOST_THREAD_CONTINUATION_SYNC
return this->then(this->launch_policy(), boost::forward<F>(func));
#else
typedef typename boost::result_of<F(shared_future<R>)>::type future_type;
BOOST_THREAD_ASSERT_PRECONDITION(this->future_!=0, future_uninitialized());
boost::unique_lock<boost::mutex> lock(this->future_->mutex);
launch policy = this->launch_policy(lock);
if (underlying_cast<int>(policy) & int(launch::deferred)) {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_shared_future_deferred_continuation_shared_state<shared_future<R>, future_type>(
lock, *this, boost::forward<F>(func)
)));
} else {
return BOOST_THREAD_MAKE_RV_REF((boost::detail::make_shared_future_sync_continuation_shared_state<shared_future<R>, future_type>(
lock, *this, boost::forward<F>(func)
)));
}
#endif
}
namespace detail
{
template <typename T>
struct mfallbacker_to
{
T value_;
typedef T result_type;
mfallbacker_to(BOOST_THREAD_RV_REF(T) v)
: value_(boost::move(v))
{}
T operator()(BOOST_THREAD_FUTURE<T> fut) {
return fut.get_or(boost::move(value_));
}
};
template <typename T>
struct cfallbacker_to
{
T value_;
typedef T result_type;
cfallbacker_to(T const& v)
: value_(v)
{}
T operator()(BOOST_THREAD_FUTURE<T> fut) const {
return fut.get_or(value_);
}
};
}
////////////////////////////////
// future<R> future<R>::fallback_to(R&& v);
////////////////////////////////
template <typename R>
template <typename R2>
inline typename boost::disable_if< is_void<R2>, BOOST_THREAD_FUTURE<R> >::type
BOOST_THREAD_FUTURE<R>::fallback_to(BOOST_THREAD_RV_REF(R2) v) {
return then(detail::mfallbacker_to<R>(boost::move(v)));
}
template <typename R>
template <typename R2>
inline typename boost::disable_if< is_void<R2>, BOOST_THREAD_FUTURE<R> >::type
BOOST_THREAD_FUTURE<R>::fallback_to(R2 const& v) {
return then(detail::cfallbacker_to<R>(v));
}
#endif
#if defined BOOST_THREAD_PROVIDES_FUTURE_UNWRAP
namespace detail
{
/////////////////////////
/// future_unwrap_shared_state
/////////////////////////
template<typename F, typename Rp>
struct future_unwrap_shared_state: shared_state<Rp>
{
F wrapped;
typename F::value_type unwrapped;
public:
explicit future_unwrap_shared_state(BOOST_THREAD_RV_REF(F) f)
: wrapped(boost::move(f)) {
}
void launch_continuation()
{
boost::unique_lock<boost::mutex> lk(this->mutex);
// assert(wrapped.is_ready());
if (! unwrapped.valid() )
{
if (wrapped.has_exception()) {
this->mark_exceptional_finish_internal(wrapped.get_exception_ptr(), lk);
} else {
unwrapped = wrapped.get();
if (unwrapped.valid())
{
lk.unlock();
boost::unique_lock<boost::mutex> lk2(unwrapped.future_->mutex);
unwrapped.future_->set_continuation_ptr(this->shared_from_this(), lk2);
} else {
this->mark_exceptional_finish_internal(boost::copy_exception(future_uninitialized()), lk);
}
}
} else {
// assert(unwrapped.is_ready());
if (unwrapped.has_exception()) {
this->mark_exceptional_finish_internal(unwrapped.get_exception_ptr(), lk);
} else {
this->mark_finished_with_result_internal(unwrapped.get(), lk);
}
}
}
};
template<typename F>
struct future_unwrap_shared_state<F,void>: shared_state<void>
{
F wrapped;
typename F::value_type unwrapped;
public:
explicit future_unwrap_shared_state(BOOST_THREAD_RV_REF(F) f)
: wrapped(boost::move(f)) {
}
void launch_continuation()
{
boost::unique_lock<boost::mutex> lk(this->mutex);
// assert(wrapped.is_ready());
if (! unwrapped.valid() )
{
if (wrapped.has_exception()) {
this->mark_exceptional_finish_internal(wrapped.get_exception_ptr(), lk);
} else {
unwrapped = wrapped.get();
if (unwrapped.valid())
{
lk.unlock();
boost::unique_lock<boost::mutex> lk2(unwrapped.future_->mutex);
unwrapped.future_->set_continuation_ptr(this->shared_from_this(), lk2);
} else {
this->mark_exceptional_finish_internal(boost::copy_exception(future_uninitialized()), lk);
}
}
} else {
// assert(unwrapped.is_ready());
if (unwrapped.has_exception()) {
this->mark_exceptional_finish_internal(unwrapped.get_exception_ptr(), lk);
} else {
this->mark_finished_with_result_internal(lk);
}
}
}
};
template <class F, class Rp>
BOOST_THREAD_FUTURE<Rp>
make_future_unwrap_shared_state(boost::unique_lock<boost::mutex> &lock, BOOST_THREAD_RV_REF(F) f) {
shared_ptr<future_unwrap_shared_state<F, Rp> >
h(new future_unwrap_shared_state<F, Rp>(boost::move(f)));
h->wrapped.future_->set_continuation_ptr(h, lock);
return BOOST_THREAD_FUTURE<Rp>(h);
}
}
template <typename R>
inline BOOST_THREAD_FUTURE<R>::BOOST_THREAD_FUTURE(BOOST_THREAD_RV_REF(BOOST_THREAD_FUTURE<BOOST_THREAD_FUTURE<R> >) other)
: base_type(other.unwrap()) {}
template <typename R2>
BOOST_THREAD_FUTURE<R2>
BOOST_THREAD_FUTURE<BOOST_THREAD_FUTURE<R2> >::unwrap()
{
BOOST_THREAD_ASSERT_PRECONDITION(this->future_!=0, future_uninitialized());
// keep state alive as we move ourself but hold the lock
shared_ptr<detail::shared_state_base> sentinel(this->future_);
boost::unique_lock<boost::mutex> lock(sentinel->mutex);
return boost::detail::make_future_unwrap_shared_state<BOOST_THREAD_FUTURE<BOOST_THREAD_FUTURE<R2> >, R2>(lock, boost::move(*this));
}
#endif
#if defined BOOST_THREAD_PROVIDES_FUTURE_WHEN_ALL_WHEN_ANY
namespace detail
{
struct input_iterator_tag {};
struct vector_tag {};
struct values_tag {};
template <typename T>
struct alias_t { typedef T type; };
BOOST_CONSTEXPR_OR_CONST input_iterator_tag input_iterator_tag_value = {};
BOOST_CONSTEXPR_OR_CONST vector_tag vector_tag_value = {};
BOOST_CONSTEXPR_OR_CONST values_tag values_tag_value = {};
////////////////////////////////
// detail::future_async_when_all_shared_state
////////////////////////////////
template<typename F>
struct future_when_all_vector_shared_state: future_async_shared_state_base<csbl::vector<F> >
{
typedef csbl::vector<F> vector_type;
typedef typename F::value_type value_type;
vector_type vec_;
static void run(shared_ptr<boost::detail::shared_state_base> that_) {
future_when_all_vector_shared_state* that = static_cast<future_when_all_vector_shared_state*>(that_.get());
try {
boost::wait_for_all(that->vec_.begin(), that->vec_.end());
that->mark_finished_with_result(boost::move(that->vec_));
} catch(...) {
that->mark_exceptional_finish();
}
}
bool run_deferred() {
bool res = false;
for (typename csbl::vector<F>::iterator it = vec_.begin(); it != vec_.end(); ++it) {
if (! it->run_if_is_deferred())
{
res = true;
}
}
return res;
}
void init() {
if (! run_deferred())
{
future_when_all_vector_shared_state::run(this->shared_from_this());
return;
}
#ifdef BOOST_THREAD_FUTURE_BLOCKING
this->thr_ = boost::thread(&future_when_all_vector_shared_state::run, this->shared_from_this());
#else
boost::thread(&future_when_all_vector_shared_state::run, this->shared_from_this()).detach();
#endif
}
public:
template< typename InputIterator>
future_when_all_vector_shared_state(input_iterator_tag, InputIterator first, InputIterator last)
: vec_(std::make_move_iterator(first), std::make_move_iterator(last))
{
}
future_when_all_vector_shared_state(vector_tag, BOOST_THREAD_RV_REF(csbl::vector<F>) v)
: vec_(boost::move(v))
{
}
#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template< typename T0, typename ...T>
future_when_all_vector_shared_state(values_tag, BOOST_THREAD_FWD_REF(T0) f, BOOST_THREAD_FWD_REF(T) ... futures) {
vec_.push_back(boost::forward<T0>(f));
typename alias_t<char[]>::type{
( //first part of magic unpacker
vec_.push_back(boost::forward<T>(futures)),'0'
)..., '0'
}; //second part of magic unpacker
}
#endif
~future_when_all_vector_shared_state() {}
};
////////////////////////////////
// detail::future_async_when_any_shared_state
////////////////////////////////
template<typename F>
struct future_when_any_vector_shared_state: future_async_shared_state_base<csbl::vector<F> >
{
typedef csbl::vector<F> vector_type;
typedef typename F::value_type value_type;
vector_type vec_;
static void run(shared_ptr<boost::detail::shared_state_base> that_)
{
future_when_any_vector_shared_state* that = static_cast<future_when_any_vector_shared_state*>(that_.get());
try {
boost::wait_for_any(that->vec_.begin(), that->vec_.end());
that->mark_finished_with_result(boost::move(that->vec_));
} catch(...) {
that->mark_exceptional_finish();
}
}
bool run_deferred() {
for (typename csbl::vector<F>::iterator it = vec_.begin(); it != vec_.end(); ++it) {
if (it->run_if_is_deferred_or_ready())
{
return true;
}
}
return false;
}
void init() {
if (run_deferred())
{
future_when_any_vector_shared_state::run(this->shared_from_this());
return;
}
#ifdef BOOST_THREAD_FUTURE_BLOCKING
this->thr_ = boost::thread(&future_when_any_vector_shared_state::run, this->shared_from_this());
#else
boost::thread(&future_when_any_vector_shared_state::run, this->shared_from_this()).detach();
#endif
}
public:
template< typename InputIterator>
future_when_any_vector_shared_state(input_iterator_tag, InputIterator first, InputIterator last)
: vec_(std::make_move_iterator(first), std::make_move_iterator(last))
{
}
future_when_any_vector_shared_state(vector_tag, BOOST_THREAD_RV_REF(csbl::vector<F>) v)
: vec_(boost::move(v))
{
}
#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template< typename T0, typename ...T>
future_when_any_vector_shared_state(values_tag,
BOOST_THREAD_FWD_REF(T0) f, BOOST_THREAD_FWD_REF(T) ... futures
) {
vec_.push_back(boost::forward<T0>(f));
typename alias_t<char[]>::type{
( //first part of magic unpacker
vec_.push_back(boost::forward<T>(futures))
,'0'
)...,
'0'
}; //second part of magic unpacker
}
#endif
~future_when_any_vector_shared_state() {}
};
#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
struct wait_for_all_fctr {
template <class ...T>
void operator()(T&&... v) {
boost::wait_for_all(boost::forward<T>(v)...);
}
};
struct wait_for_any_fctr {
template <class ...T>
void operator()(T&&... v) {
boost::wait_for_any(boost::forward<T>(v)...);
}
};
template <class Tuple, std::size_t i=csbl::tuple_size<Tuple>::value>
struct accumulate_run_if_is_deferred {
bool operator ()(Tuple& t)
{
return (! csbl::get<i-1>(t).run_if_is_deferred()) || accumulate_run_if_is_deferred<Tuple,i-1>()(t);
}
};
template <class Tuple>
struct accumulate_run_if_is_deferred<Tuple, 0> {
bool operator ()(Tuple& )
{
return false;
}
};
template< typename Tuple, typename T0, typename ...T>
struct future_when_all_tuple_shared_state: future_async_shared_state_base<Tuple>
{
Tuple tup_;
typedef typename make_tuple_indices<1+sizeof...(T)>::type Index;
static void run(shared_ptr<boost::detail::shared_state_base> that_) {
future_when_all_tuple_shared_state* that = static_cast<future_when_all_tuple_shared_state*>(that_.get());
try {
// TODO make use of apply(that->tup_, boost::detail::wait_for_all_fctor());
that->wait_for_all(Index());
that->mark_finished_with_result(boost::move(that->tup_));
} catch(...) {
that->mark_exceptional_finish();
}
}
template <size_t ...Indices>
void wait_for_all(tuple_indices<Indices...>) {
#if defined BOOST_THREAD_PROVIDES_INVOKE
return invoke<void>(wait_for_all_fctr(), csbl::get<Indices>(tup_)...);
#else
return wait_for_all_fctr()(csbl::get<Indices>(tup_)...);
#endif
}
bool run_deferred() {
return accumulate_run_if_is_deferred<Tuple>()(tup_);
}
void init() {
if (! run_deferred())
{
future_when_all_tuple_shared_state::run(this->shared_from_this());
return;
}
#ifdef BOOST_THREAD_FUTURE_BLOCKING
this->thr_ = boost::thread(&future_when_all_tuple_shared_state::run, this->shared_from_this());
#else
boost::thread(&future_when_all_tuple_shared_state::run, this->shared_from_this()).detach();
#endif
}
public:
template< typename F, typename ...Fs>
future_when_all_tuple_shared_state(values_tag, BOOST_THREAD_FWD_REF(F) f, BOOST_THREAD_FWD_REF(Fs) ... futures) :
tup_(boost::csbl::make_tuple(boost::forward<F>(f), boost::forward<Fs>(futures)...))
{
}
~future_when_all_tuple_shared_state() {}
};
template <class Tuple, std::size_t i=csbl::tuple_size<Tuple>::value>
struct apply_any_run_if_is_deferred_or_ready {
bool operator ()(Tuple& t)
{
if (csbl::get<i-1>(t).run_if_is_deferred_or_ready()) return true;
return apply_any_run_if_is_deferred_or_ready<Tuple,i-1>()(t);
}
};
template <class Tuple>
struct apply_any_run_if_is_deferred_or_ready<Tuple, 0> {
bool operator ()(Tuple& )
{
return false;
}
};
template< typename Tuple, typename T0, typename ...T >
struct future_when_any_tuple_shared_state: future_async_shared_state_base<Tuple>
{
Tuple tup_;
typedef typename make_tuple_indices<1+sizeof...(T)>::type Index;
static void run(shared_ptr<boost::detail::shared_state_base> that_)
{
future_when_any_tuple_shared_state* that = static_cast<future_when_any_tuple_shared_state*>(that_.get());
try {
// TODO make use of apply(that->tup_, wait_for_any_fctr);
that->wait_for_any(Index());
that->mark_finished_with_result(boost::move(that->tup_));
} catch(...) {
that->mark_exceptional_finish();
}
}
template <size_t ...Indices>
void wait_for_any(tuple_indices<Indices...>) {
#if defined BOOST_THREAD_PROVIDES_INVOKE
return invoke<void>(wait_for_any_fctr(), csbl::get<Indices>(tup_)...);
#else
return wait_for_any_fctr()(csbl::get<Indices>(tup_)...);
#endif
}
bool run_deferred() {
return apply_any_run_if_is_deferred_or_ready<Tuple>()(tup_);
}
void init() {
if (run_deferred())
{
future_when_any_tuple_shared_state::run(this->shared_from_this());
return;
}
#ifdef BOOST_THREAD_FUTURE_BLOCKING
this->thr_ = boost::thread(&future_when_any_tuple_shared_state::run, this->shared_from_this());
#else
boost::thread(&future_when_any_tuple_shared_state::run, this->shared_from_this()).detach();
#endif
}
public:
template< typename F, typename ...Fs>
future_when_any_tuple_shared_state(values_tag,
BOOST_THREAD_FWD_REF(F) f, BOOST_THREAD_FWD_REF(Fs) ... futures
) :
tup_(boost::csbl::make_tuple(boost::forward<F>(f), boost::forward<Fs>(futures)...))
{
}
~future_when_any_tuple_shared_state() {}
};
#endif
}
template< typename InputIterator>
typename boost::disable_if<is_future_type<InputIterator>,
BOOST_THREAD_FUTURE<csbl::vector<typename InputIterator::value_type> >
>::type
when_all(InputIterator first, InputIterator last) {
typedef typename InputIterator::value_type value_type;
typedef csbl::vector<value_type> container_type;
typedef detail::future_when_all_vector_shared_state<value_type> factory_type;
if (first==last) return make_ready_future(container_type());
shared_ptr<factory_type >
h(new factory_type(detail::input_iterator_tag_value, first,last));
h->init();
return BOOST_THREAD_FUTURE<container_type>(h);
}
inline BOOST_THREAD_FUTURE<csbl::tuple<> > when_all() {
return make_ready_future(csbl::tuple<>());
}
#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template< typename T0, typename ...T>
BOOST_THREAD_FUTURE<csbl::tuple<typename decay<T0>::type, typename decay<T>::type...> >
when_all(BOOST_THREAD_FWD_REF(T0) f, BOOST_THREAD_FWD_REF(T) ... futures) {
typedef csbl::tuple<typename decay<T0>::type, typename decay<T>::type...> container_type;
typedef detail::future_when_all_tuple_shared_state<container_type, typename decay<T0>::type, typename decay<T>::type...> factory_type;
shared_ptr<factory_type>
h(new factory_type(detail::values_tag_value, boost::forward<T0>(f), boost::forward<T>(futures)...));
h->init();
return BOOST_THREAD_FUTURE<container_type>(h);
}
#endif
template< typename InputIterator>
typename boost::disable_if<is_future_type<InputIterator>,
BOOST_THREAD_FUTURE<csbl::vector<typename InputIterator::value_type> >
>::type
when_any(InputIterator first, InputIterator last) {
typedef typename InputIterator::value_type value_type;
typedef csbl::vector<value_type> container_type;
typedef detail::future_when_any_vector_shared_state<value_type> factory_type;
if (first==last) return make_ready_future(container_type());
shared_ptr<factory_type >
h(new factory_type(detail::input_iterator_tag_value, first,last));
h->init();
return BOOST_THREAD_FUTURE<container_type>(h);
}
inline BOOST_THREAD_FUTURE<csbl::tuple<> > when_any() {
return make_ready_future(csbl::tuple<>());
}
#if ! defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
template< typename T0, typename ...T>
BOOST_THREAD_FUTURE<csbl::tuple<typename decay<T0>::type, typename decay<T>::type...> >
when_any(BOOST_THREAD_FWD_REF(T0) f, BOOST_THREAD_FWD_REF(T) ... futures) {
typedef csbl::tuple<typename decay<T0>::type, typename decay<T>::type...> container_type;
typedef detail::future_when_any_tuple_shared_state<container_type, typename decay<T0>::type, typename decay<T>::type...> factory_type;
shared_ptr<factory_type>
h(new factory_type(detail::values_tag_value, boost::forward<T0>(f), boost::forward<T>(futures)...));
h->init();
return BOOST_THREAD_FUTURE<container_type>(h);
}
#endif
#endif // BOOST_THREAD_PROVIDES_FUTURE_WHEN_ALL_WHEN_ANY
}
#endif // BOOST_NO_EXCEPTION
#endif // header
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