mirror of
https://github.com/ecency/ecency-mobile.git
synced 2024-12-30 09:07:28 +03:00
236 lines
6.3 KiB
C++
236 lines
6.3 KiB
C++
// 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)
|
|
// (C) Copyright 2008-2009,2012 Vicente J. Botet Escriba
|
|
|
|
#ifndef BOOST_THREAD_STRICT_LOCK_HPP
|
|
#define BOOST_THREAD_STRICT_LOCK_HPP
|
|
|
|
#include <boost/thread/detail/config.hpp>
|
|
#include <boost/thread/detail/delete.hpp>
|
|
#include <boost/thread/detail/lockable_wrapper.hpp>
|
|
#include <boost/thread/lock_options.hpp>
|
|
#include <boost/thread/lock_traits.hpp>
|
|
#include <boost/thread/lockable_traits.hpp>
|
|
#include <boost/thread/lockable_concepts.hpp>
|
|
#include <boost/thread/lock_concepts.hpp>
|
|
#include <boost/thread/exceptions.hpp>
|
|
#include <boost/throw_exception.hpp>
|
|
|
|
#include <boost/config/abi_prefix.hpp>
|
|
|
|
namespace boost
|
|
{
|
|
|
|
|
|
//[strict_lock
|
|
template <typename Lockable>
|
|
class strict_lock
|
|
{
|
|
|
|
BOOST_CONCEPT_ASSERT(( BasicLockable<Lockable> ));
|
|
public:
|
|
typedef Lockable mutex_type;
|
|
|
|
// construct/copy/destroy:
|
|
|
|
BOOST_THREAD_NO_COPYABLE( strict_lock)
|
|
|
|
/**
|
|
* Constructor from a mutex reference.
|
|
*
|
|
* @param mtx the mutex to lock.
|
|
*
|
|
* __Effects: Stores a reference to the mutex to lock and locks it.
|
|
* __Throws: Any exception BasicMutex::lock() can throw.
|
|
*/
|
|
explicit strict_lock(mutex_type& mtx) :
|
|
mtx_(mtx)
|
|
{
|
|
mtx.lock();
|
|
} /*< locks on construction >*/
|
|
|
|
|
|
#if ! defined BOOST_THREAD_NO_CXX11_HDR_INITIALIZER_LIST
|
|
strict_lock(std::initializer_list<thread_detail::lockable_wrapper<Lockable> > l_) :
|
|
mtx_(*(const_cast<thread_detail::lockable_wrapper<Lockable>*>(l_.begin())->m))
|
|
{
|
|
mtx_.lock();
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* Destructor
|
|
*
|
|
* __Effects: unlocks the stored mutex.
|
|
*
|
|
* __Throws
|
|
*/
|
|
~strict_lock()
|
|
{
|
|
mtx_.unlock();
|
|
} /*< unlocks on destruction >*/
|
|
|
|
|
|
// observers
|
|
|
|
/**
|
|
* @return the owned mutex.
|
|
*/
|
|
mutex_type* mutex() const BOOST_NOEXCEPT
|
|
{
|
|
return &mtx_;
|
|
}
|
|
|
|
/**
|
|
* @return whether this lock is locking a mutex.
|
|
*/
|
|
bool owns_lock() const BOOST_NOEXCEPT
|
|
{
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @return whether this lock is locking that mutex.
|
|
*/
|
|
bool owns_lock(const mutex_type* l) const BOOST_NOEXCEPT
|
|
{
|
|
return l == mutex();
|
|
} /*< strict locks specific function >*/
|
|
|
|
//BOOST_ADRESS_OF_DELETE(strict_lock) /*< disable aliasing >*/
|
|
//BOOST_HEAP_ALLOCATION_DELETE(strict_lock) /*< disable heap allocation >*/
|
|
|
|
/*< no possibility to unlock >*/
|
|
|
|
private:
|
|
mutex_type& mtx_;
|
|
};
|
|
//]
|
|
template <typename Lockable>
|
|
struct is_strict_lock_sur_parole<strict_lock<Lockable> > : true_type
|
|
{
|
|
};
|
|
|
|
/**
|
|
* A nested strict lock is a scoped lock guard ensuring the mutex is locked on its
|
|
* scope, by taking ownership of an nesting lock, locking the mutex on construction if not already locked
|
|
* and restoring the ownership to the nesting lock on destruction.
|
|
*/
|
|
//[nested_strict_lock
|
|
template <typename Lock>
|
|
class nested_strict_lock
|
|
{
|
|
BOOST_CONCEPT_ASSERT(( BasicLock<Lock> )); /*< The Lock must be a movable lock >*/
|
|
public:
|
|
typedef typename Lock::mutex_type mutex_type; /*< Name the lockable type locked by Lock >*/
|
|
|
|
BOOST_THREAD_NO_COPYABLE( nested_strict_lock)
|
|
|
|
/**
|
|
* Constructor from a nesting @c Lock.
|
|
*
|
|
* @param lk the nesting lock
|
|
*
|
|
* __Requires: <c>lk.mutex() != null_ptr</c>
|
|
* __Effects: Stores the reference to the lock parameter and takes ownership on it.
|
|
* If the lock doesn't owns the mutex @c mtx lock it.
|
|
* __Postconditions: @c owns_lock(lk.mutex())
|
|
* __StrongException
|
|
* __Throws:
|
|
*
|
|
* - lock_error when BOOST_THREAD_THROW_IF_PRECONDITION_NOT_SATISFIED is defined and lk.mutex() == null_ptr
|
|
*
|
|
* - Any exception that @c lk.lock() can throw.
|
|
*
|
|
*/
|
|
explicit nested_strict_lock(Lock& lk) :
|
|
lk_(lk) /*< Store reference to lk >*/
|
|
{
|
|
/*< Define BOOST_THREAD_DONT_CHECK_PRECONDITIONS if you don't want to check lk ownership >*/
|
|
BOOST_THREAD_ASSERT_PRECONDITION( lk.mutex() != 0,
|
|
lock_error()
|
|
);
|
|
if (!lk.owns_lock()) lk.lock(); /*< ensures it is locked >*/
|
|
tmp_lk_ = move(lk); /*< Move ownership to temporary lk >*/
|
|
}
|
|
|
|
#if ! defined BOOST_THREAD_NO_CXX11_HDR_INITIALIZER_LIST
|
|
nested_strict_lock(std::initializer_list<thread_detail::lockable_wrapper<Lock> > l_) :
|
|
lk_(*(const_cast<thread_detail::lockable_wrapper<Lock>*>(l_.begin())->m))
|
|
{
|
|
/*< Define BOOST_THREAD_DONT_CHECK_PRECONDITIONS if you don't want to check lk ownership >*/
|
|
BOOST_THREAD_ASSERT_PRECONDITION( lk_.mutex() != 0,
|
|
lock_error()
|
|
);
|
|
if (!lk_.owns_lock()) lk_.lock(); /*< ensures it is locked >*/
|
|
tmp_lk_ = move(lk_); /*< Move ownership to temporary lk >*/
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* Destructor
|
|
*
|
|
* __Effects: Restores ownership to the nesting lock.
|
|
*/
|
|
~nested_strict_lock()BOOST_NOEXCEPT
|
|
{
|
|
lk_ = move(tmp_lk_); /*< Move ownership to nesting lock >*/
|
|
}
|
|
|
|
// observers
|
|
/**
|
|
* return @c the owned mutex.
|
|
*/
|
|
mutex_type* mutex() const BOOST_NOEXCEPT
|
|
{
|
|
return tmp_lk_.mutex();
|
|
}
|
|
|
|
/**
|
|
* @return whether this lock is locking a mutex.
|
|
*/
|
|
bool owns_lock() const BOOST_NOEXCEPT
|
|
{
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @return whether if this lock is locking that mutex.
|
|
*/
|
|
bool owns_lock(mutex_type const* l) const BOOST_NOEXCEPT
|
|
{
|
|
return l == mutex();
|
|
}
|
|
|
|
//BOOST_ADRESS_OF_DELETE(nested_strict_lock)
|
|
//BOOST_HEAP_ALLOCATEION_DELETE(nested_strict_lock)
|
|
|
|
private:
|
|
Lock& lk_;
|
|
Lock tmp_lk_;
|
|
};
|
|
//]
|
|
|
|
template <typename Lock>
|
|
struct is_strict_lock_sur_parole<nested_strict_lock<Lock> > : true_type
|
|
{
|
|
};
|
|
|
|
#if ! defined BOOST_THREAD_NO_MAKE_STRICT_LOCK
|
|
template <typename Lockable>
|
|
strict_lock<Lockable> make_strict_lock(Lockable& mtx)
|
|
{
|
|
return { thread_detail::lockable_wrapper<Lockable>(mtx) };
|
|
}
|
|
template <typename Lock>
|
|
nested_strict_lock<Lock> make_nested_strict_lock(Lock& lk)
|
|
{
|
|
return { thread_detail::lockable_wrapper<Lock>(lk) };
|
|
}
|
|
#endif
|
|
}
|
|
#include <boost/config/abi_suffix.hpp>
|
|
|
|
#endif
|