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#ifndef BOOST_SMART_PTR_DETAIL_LWM_PTHREADS_HPP_INCLUDED
#define BOOST_SMART_PTR_DETAIL_LWM_PTHREADS_HPP_INCLUDED
// MS compatible compilers support #pragma once
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif
//
// boost/detail/lwm_pthreads.hpp
//
// Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
//
// 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)
//
#include <pthread.h>
namespace boost
{
namespace detail
{
class lightweight_mutex
{
private:
pthread_mutex_t m_;
lightweight_mutex(lightweight_mutex const &);
lightweight_mutex & operator=(lightweight_mutex const &);
public:
lightweight_mutex()
{
// HPUX 10.20 / DCE has a nonstandard pthread_mutex_init
#if defined(__hpux) && defined(_DECTHREADS_)
pthread_mutex_init(&m_, pthread_mutexattr_default);
#else
pthread_mutex_init(&m_, 0);
#endif
}
~lightweight_mutex()
{
pthread_mutex_destroy(&m_);
}
class scoped_lock;
friend class scoped_lock;
class scoped_lock
{
private:
pthread_mutex_t & m_;
scoped_lock(scoped_lock const &);
scoped_lock & operator=(scoped_lock const &);
public:
scoped_lock(lightweight_mutex & m): m_(m.m_)
{
pthread_mutex_lock(&m_);
}
~scoped_lock()
{
pthread_mutex_unlock(&m_);
}
};
};
} // namespace detail
} // namespace boost
#endif // #ifndef BOOST_SMART_PTR_DETAIL_LWM_PTHREADS_HPP_INCLUDED
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