60 lines
1.3 KiB
C++
60 lines
1.3 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 2012 Vicente J. Botet Escriba
|
||
|
|
|
||
|
|
#ifndef BOOST_THREAD_REVERSE_LOCK_HPP
|
||
|
|
#define BOOST_THREAD_REVERSE_LOCK_HPP
|
||
|
|
#include <boost/thread/detail/config.hpp>
|
||
|
|
#include <boost/thread/detail/move.hpp>
|
||
|
|
#include <boost/thread/lockable_traits.hpp>
|
||
|
|
#include <boost/thread/lock_options.hpp>
|
||
|
|
#include <boost/thread/detail/delete.hpp>
|
||
|
|
|
||
|
|
namespace boost
|
||
|
|
{
|
||
|
|
|
||
|
|
template<typename Lock>
|
||
|
|
class reverse_lock
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
typedef typename Lock::mutex_type mutex_type;
|
||
|
|
BOOST_THREAD_NO_COPYABLE(reverse_lock)
|
||
|
|
|
||
|
|
explicit reverse_lock(Lock& m_)
|
||
|
|
: m(m_), mtx(0)
|
||
|
|
{
|
||
|
|
if (m.owns_lock())
|
||
|
|
{
|
||
|
|
m.unlock();
|
||
|
|
}
|
||
|
|
mtx=m.release();
|
||
|
|
}
|
||
|
|
~reverse_lock()
|
||
|
|
{
|
||
|
|
if (mtx) {
|
||
|
|
mtx->lock();
|
||
|
|
m = BOOST_THREAD_MAKE_RV_REF(Lock(*mtx, adopt_lock));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
Lock& m;
|
||
|
|
mutex_type* mtx;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef BOOST_THREAD_NO_AUTO_DETECT_MUTEX_TYPES
|
||
|
|
template<typename T>
|
||
|
|
struct is_mutex_type<reverse_lock<T> >
|
||
|
|
{
|
||
|
|
BOOST_STATIC_CONSTANT(bool, value = true);
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // header
|