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/*
* 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 2013 Andrey Semashev
* (C) Copyright 2013 Tim Blechmann
*/
/*!
* \file sync/mutexes/spin_mutex.hpp
*
* \brief This header defines a spin mutex primitive.
*/
#ifndef BOOST_SYNC_MUTEXES_SPIN_MUTEX_HPP_INCLUDED_
#define BOOST_SYNC_MUTEXES_SPIN_MUTEX_HPP_INCLUDED_
#if defined(BOOST_SYNC_DETAIL_DOXYGEN)
namespace boost {
namespace sync {
class spin_mutex
{
public:
/*!
* \brief Default constructor
*
* Creates a mutual exclusion primitive in the unlocked state.
*/
spin_mutex() noexcept;
/*!
* \brief Destructor
*
* Destroys the mutual exclusion primitive.
*
* \pre The primitive is in the unlocked state.
*/
~spin_mutex() noexcept;
spin_mutex(mutex const&) = delete;
spin_mutex& operator= (mutex const&) = delete;
/*!
* \brief Locks the mutex
*
* If the mutex is not locked, the method locks it and returns. Otherwise the method blocks until the mutex is unlocked.
*/
void lock() noexcept;
/*!
* \brief Attempts to lock the mutex
*
* If the mutex is not locked, the method locks it and returns \c true. Otherwise the method returns \c false.
*/
bool try_lock() noexcept;
/*!
* \brief Unlocks the mutex
*
* Releases the mutex that has been locked by the current thread.
*
* \pre The mutex is locked by the current thread.
*/
void unlock() noexcept;
};
} // namespace sync
} // namespace boost
#else // defined(BOOST_SYNC_DETAIL_DOXYGEN)
#include <boost/sync/detail/config.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
#pragma once
#endif
#include <boost/sync/detail/mutexes/spin_mutex.hpp>
#endif // defined(BOOST_SYNC_DETAIL_DOXYGEN)
#endif // BOOST_SYNC_MUTEXES_SPIN_MUTEX_HPP_INCLUDED_
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