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/* Copyright 2006-2008 Joaquin M Lopez Munoz.
* 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)
*
* See http://www.boost.org/libs/flyweight for library home page.
*/
#ifndef BOOST_FLYWEIGHT_DETAIL_RECURSIVE_LW_MUTEX_HPP
#define BOOST_FLYWEIGHT_DETAIL_RECURSIVE_LW_MUTEX_HPP
#if defined(_MSC_VER)&&(_MSC_VER>=1200)
#pragma once
#endif
/* Recursive lightweight mutex. Relies entirely on
* boost::detail::lightweight_mutex, except in Pthreads, where we
* explicitly use the PTHREAD_MUTEX_RECURSIVE attribute
* (lightweight_mutex uses the default mutex type instead).
*/
#include <boost/config.hpp>
#if !defined(BOOST_HAS_PTHREADS)
#include <boost/detail/lightweight_mutex.hpp>
namespace boost{
namespace flyweights{
namespace detail{
typedef boost::detail::lightweight_mutex recursive_lightweight_mutex;
} /* namespace flyweights::detail */
} /* namespace flyweights */
} /* namespace boost */
#else
/* code shamelessly ripped from <boost/detail/lwm_pthreads.hpp> */
#include <boost/noncopyable.hpp>
#include <pthread.h>
namespace boost{
namespace flyweights{
namespace detail{
struct recursive_lightweight_mutex:noncopyable
{
recursive_lightweight_mutex()
{
pthread_mutexattr_t attr;
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr,PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&m_,&attr);
pthread_mutexattr_destroy(&attr);
}
~recursive_lightweight_mutex(){pthread_mutex_destroy(&m_);}
struct scoped_lock;
friend struct scoped_lock;
struct scoped_lock:noncopyable
{
public:
scoped_lock(recursive_lightweight_mutex& m):m_(m.m_)
{
pthread_mutex_lock(&m_);
}
~scoped_lock(){pthread_mutex_unlock(&m_);}
private:
pthread_mutex_t& m_;
};
private:
pthread_mutex_t m_;
};
} /* namespace flyweights::detail */
} /* namespace flyweights */
} /* namespace boost */
#endif
#endif
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