--- /dev/null
+#ifndef BOOST_DETAIL_LWM_PTHREADS_HPP_INCLUDED
+#define BOOST_DETAIL_LWM_PTHREADS_HPP_INCLUDED
+
+#if _MSC_VER >= 1020
+#pragma once
+#endif
+
+//
+// boost/detail/lwm_pthreads.hpp
+//
+// Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
+//
+// Permission to copy, use, modify, sell and distribute this software
+// is granted provided this copyright notice appears in all copies.
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+
+#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