mirror of
https://github.com/ecency/ecency-mobile.git
synced 2024-12-23 05:13:04 +03:00
109 lines
3.4 KiB
C++
109 lines
3.4 KiB
C++
// Boost.Signals2 library
|
|
|
|
// Copyright Frank Mori Hess 2007-2008.
|
|
// Copyright Timmo Stange 2007.
|
|
// Copyright Douglas Gregor 2001-2004. Use, modification and
|
|
// distribution is subject to 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)
|
|
|
|
// For more information, see http://www.boost.org
|
|
|
|
#ifndef BOOST_SIGNALS2_SLOT_BASE_HPP
|
|
#define BOOST_SIGNALS2_SLOT_BASE_HPP
|
|
|
|
#include <boost/shared_ptr.hpp>
|
|
#include <boost/weak_ptr.hpp>
|
|
#include <boost/signals2/detail/foreign_ptr.hpp>
|
|
#include <boost/signals2/expired_slot.hpp>
|
|
#include <boost/signals2/signal_base.hpp>
|
|
#include <boost/variant/apply_visitor.hpp>
|
|
#include <boost/variant/variant.hpp>
|
|
#include <vector>
|
|
|
|
namespace boost
|
|
{
|
|
namespace signals2
|
|
{
|
|
namespace detail
|
|
{
|
|
class tracked_objects_visitor;
|
|
class trackable_pointee;
|
|
|
|
typedef boost::variant<boost::weak_ptr<trackable_pointee>, boost::weak_ptr<void>, detail::foreign_void_weak_ptr > void_weak_ptr_variant;
|
|
typedef boost::variant<boost::shared_ptr<void>, detail::foreign_void_shared_ptr > void_shared_ptr_variant;
|
|
class lock_weak_ptr_visitor
|
|
{
|
|
public:
|
|
typedef void_shared_ptr_variant result_type;
|
|
template<typename WeakPtr>
|
|
result_type operator()(const WeakPtr &wp) const
|
|
{
|
|
return wp.lock();
|
|
}
|
|
// overload to prevent incrementing use count of shared_ptr associated
|
|
// with signals2::trackable objects
|
|
result_type operator()(const weak_ptr<trackable_pointee> &) const
|
|
{
|
|
return boost::shared_ptr<void>();
|
|
}
|
|
};
|
|
class expired_weak_ptr_visitor
|
|
{
|
|
public:
|
|
typedef bool result_type;
|
|
template<typename WeakPtr>
|
|
bool operator()(const WeakPtr &wp) const
|
|
{
|
|
return wp.expired();
|
|
}
|
|
};
|
|
}
|
|
|
|
class slot_base
|
|
{
|
|
public:
|
|
typedef std::vector<detail::void_weak_ptr_variant> tracked_container_type;
|
|
typedef std::vector<detail::void_shared_ptr_variant> locked_container_type;
|
|
|
|
const tracked_container_type& tracked_objects() const {return _tracked_objects;}
|
|
#ifndef BOOST_NO_EXCEPTIONS
|
|
locked_container_type lock() const
|
|
{
|
|
locked_container_type locked_objects;
|
|
tracked_container_type::const_iterator it;
|
|
for(it = tracked_objects().begin(); it != tracked_objects().end(); ++it)
|
|
{
|
|
locked_objects.push_back(apply_visitor(detail::lock_weak_ptr_visitor(), *it));
|
|
if(apply_visitor(detail::expired_weak_ptr_visitor(), *it))
|
|
{
|
|
throw expired_slot();
|
|
}
|
|
}
|
|
return locked_objects;
|
|
}
|
|
#endif
|
|
bool expired() const
|
|
{
|
|
tracked_container_type::const_iterator it;
|
|
for(it = tracked_objects().begin(); it != tracked_objects().end(); ++it)
|
|
{
|
|
if(apply_visitor(detail::expired_weak_ptr_visitor(), *it)) return true;
|
|
}
|
|
return false;
|
|
}
|
|
protected:
|
|
friend class detail::tracked_objects_visitor;
|
|
|
|
void track_signal(const signal_base &signal)
|
|
{
|
|
_tracked_objects.push_back(signal.lock_pimpl());
|
|
}
|
|
|
|
tracked_container_type _tracked_objects;
|
|
};
|
|
}
|
|
} // end namespace boost
|
|
|
|
#endif // BOOST_SIGNALS2_SLOT_BASE_HPP
|