#ifndef BOOST_DETAIL_LWM_PTHREADS_HPP_INCLUDED

 #define BOOST_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_DETAIL_LWM_PTHREADS_HPP_INCLUDED