comparison DEPENDENCIES/generic/include/boost/interprocess/sync/posix/mutex.hpp @ 16:2665513ce2d3

Add boost headers

+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2005-2012. 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>
+#  include <boost/interprocess/sync/spin/wait.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();
+
+   spin_wait swait;
+   do{
+      if(this->try_lock()){
+         break;
+      }
+      now = microsec_clock::universal_time();
+
+      if(now >= abs_time){
+         return false;
+      }
+      // relinquish current time slice
+      swait.yield();
+   }while (true);
+   return true;
+
+   #endif   //BOOST_INTERPROCESS_POSIX_TIMEOUTS
+}
+
+inline void posix_mutex::unlock()
+{
+   int res = 0;
+   res = pthread_mutex_unlock(&m_mut);
+   (void)res;
+   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