boost/signals2/detail/lwm_pthreads.hpp

//
//  boost/signals2/detail/lwm_pthreads.hpp
//
//  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
//  Copyright (c) 2008 Frank Mori Hess
//
// 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)
//
#ifndef BOOST_SIGNALS2_LWM_PTHREADS_HPP
#define BOOST_SIGNALS2_LWM_PTHREADS_HPP
// MS compatible compilers support #pragma once
#if defined(_MSC_VER)
# pragma once
#endif
#include <boost/assert.hpp>
#include <pthread.h>
namespace boost
{
namespace signals2
{
class mutex
{
private:
    pthread_mutex_t m_;
    mutex(mutex const &);
    mutex & operator=(mutex const &);
public:
    mutex()
    {
// HPUX 10.20 / DCE has a nonstandard pthread_mutex_init
#if defined(__hpux) && defined(_DECTHREADS_)
        BOOST_VERIFY(pthread_mutex_init(&m_, pthread_mutexattr_default) == 0);
#else
        BOOST_VERIFY(pthread_mutex_init(&m_, 0) == 0);
#endif
    }
    ~mutex()
    {
        BOOST_VERIFY(pthread_mutex_destroy(&m_) == 0);
    }
    void lock()
    {
        BOOST_VERIFY(pthread_mutex_lock(&m_) == 0);
    }
    bool try_lock()
    {
        return pthread_mutex_trylock(&m_) == 0;
    }
    void unlock()
    {
        BOOST_VERIFY(pthread_mutex_unlock(&m_) == 0);
    }
};
} // namespace signals2
} // namespace boost
#endif // #ifndef BOOST_SIGNALS2_LWM_PTHREADS_HPP