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+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2005-2011. 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/interprocess for documentation.
+//
+//////////////////////////////////////////////////////////////////////////////
+//
+// Parts of the pthread code come from Boost Threads code:
+//
+//////////////////////////////////////////////////////////////////////////////
+//
+// Copyright (C) 2001-2003
+// William E. Kempf
+//
+// Permission to use, copy, modify, distribute and sell this software
+// and its documentation for any purpose is hereby granted without fee,
+// provided that the above copyright notice appear in all copies and
+// that both that copyright notice and this permission notice appear
+// in supporting documentation. William E. Kempf makes no representations
+// about the suitability of this software for any purpose.
+// It is provided "as is" without express or implied warranty.
+//////////////////////////////////////////////////////////////////////////////
+
+#ifndef BOOST_INTERPROCESS_DETAIL_POSIX_MUTEX_HPP
+#define BOOST_INTERPROCESS_DETAIL_POSIX_MUTEX_HPP
+
+#if (defined _MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif
+
+#include <boost/interprocess/detail/config_begin.hpp>
+#include <boost/interprocess/detail/workaround.hpp>
+
+#include <pthread.h>
+#include <errno.h>
+#include <boost/interprocess/exceptions.hpp>
+#include <boost/interprocess/sync/posix/ptime_to_timespec.hpp>
+#include <boost/interprocess/detail/posix_time_types_wrk.hpp>
+#include <boost/interprocess/exceptions.hpp>
+#include <boost/interprocess/sync/posix/pthread_helpers.hpp>
+
+#ifndef BOOST_INTERPROCESS_POSIX_TIMEOUTS
+# include <boost/interprocess/detail/os_thread_functions.hpp>
+#endif
+#include <boost/assert.hpp>
+
+namespace boost {
+namespace interprocess {
+namespace ipcdetail {
+
+class posix_condition;
+
+class posix_mutex
+{
+ posix_mutex(const posix_mutex &);
+ posix_mutex &operator=(const posix_mutex &);
+ public:
+
+ posix_mutex();
+ ~posix_mutex();
+
+ void lock();
+ bool try_lock();
+ bool timed_lock(const boost::posix_time::ptime &abs_time);
+ void unlock();
+
+ friend class posix_condition;
+
+ private:
+ pthread_mutex_t m_mut;
+};
+
+inline posix_mutex::posix_mutex()
+{
+ mutexattr_wrapper mut_attr;
+ mutex_initializer mut(m_mut, mut_attr);
+ mut.release();
+}
+
+inline posix_mutex::~posix_mutex()
+{
+ int res = pthread_mutex_destroy(&m_mut);
+ BOOST_ASSERT(res == 0);(void)res;
+}
+
+inline void posix_mutex::lock()
+{
+ if (pthread_mutex_lock(&m_mut) != 0)
+ throw lock_exception();
+}
+
+inline bool posix_mutex::try_lock()
+{
+ int res = pthread_mutex_trylock(&m_mut);
+ if (!(res == 0 || res == EBUSY))
+ throw lock_exception();
+ return res == 0;
+}
+
+inline bool posix_mutex::timed_lock(const boost::posix_time::ptime &abs_time)
+{
+ if(abs_time == boost::posix_time::pos_infin){
+ this->lock();
+ return true;
+ }
+ #ifdef BOOST_INTERPROCESS_POSIX_TIMEOUTS
+
+ timespec ts = ptime_to_timespec(abs_time);
+ int res = pthread_mutex_timedlock(&m_mut, &ts);
+ if (res != 0 && res != ETIMEDOUT)
+ throw lock_exception();
+ return res == 0;
+
+ #else //BOOST_INTERPROCESS_POSIX_TIMEOUTS
+
+ //Obtain current count and target time
+ boost::posix_time::ptime now = microsec_clock::universal_time();
+
+ do{
+ if(this->try_lock()){
+ break;
+ }
+ now = microsec_clock::universal_time();
+
+ if(now >= abs_time){
+ return false;
+ }
+ // relinquish current time slice
+ thread_yield();
+ }while (true);
+ return true;
+
+ #endif //BOOST_INTERPROCESS_POSIX_TIMEOUTS
+}
+
+inline void posix_mutex::unlock()
+{
+ int res = 0;
+ res = pthread_mutex_unlock(&m_mut);
+ BOOST_ASSERT(res == 0);
+}
+
+} //namespace ipcdetail {
+} //namespace interprocess {
+} //namespace boost {
+
+#include <boost/interprocess/detail/config_end.hpp>
+
+#endif //#ifndef BOOST_INTERPROCESS_DETAIL_POSIX_MUTEX_HPP