Added boost header

test/external/boost/interprocess/sync/emulation/interprocess_semaphore.hpp

@@ -0,0 +1,75 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2005-2009. 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.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+#include<boost/interprocess/exceptions.hpp>
+#include <boost/interprocess/detail/posix_time_types_wrk.hpp>
+
+namespace boost {
+namespace interprocess {
+
+
+inline interprocess_semaphore::~interprocess_semaphore()
+{}
+
+inline interprocess_semaphore::interprocess_semaphore(unsigned int initialCount)
+{  ipcdetail::atomic_write32(&this->m_count, boost::uint32_t(initialCount));  }
+
+inline void interprocess_semaphore::post()
+{
+   ipcdetail::atomic_inc32(&m_count);
+}
+
+inline void interprocess_semaphore::wait()
+{
+   while(!ipcdetail::atomic_add_unless32(&m_count, boost::uint32_t(-1), boost::uint32_t(0))){
+      while(ipcdetail::atomic_read32(&m_count) == 0){
+         ipcdetail::thread_yield();
+      }
+   }
+}
+
+inline bool interprocess_semaphore::try_wait()
+{
+   return ipcdetail::atomic_add_unless32(&m_count, boost::uint32_t(-1), boost::uint32_t(0));
+}
+
+inline bool interprocess_semaphore::timed_wait(const boost::posix_time::ptime &abs_time)
+{
+   if(abs_time == boost::posix_time::pos_infin){
+      this->wait();
+      return true;
+   }
+   //Obtain current count and target time
+   boost::posix_time::ptime now(microsec_clock::universal_time());
+   if(now >= abs_time)
+      return false;
+
+   do{
+      if(this->try_wait()){
+         break;
+      }
+      now = microsec_clock::universal_time();
+
+      if(now >= abs_time){
+         return this->try_wait();
+      }
+      // relinquish current time slice
+      ipcdetail::thread_yield();
+   }while (true);
+   return true;
+}
+/*
+inline int interprocess_semaphore::get_count() const
+{
+   return (int)ipcdetail::atomic_read32(&m_count);
+}*/
+
+}  //namespace interprocess {
+}  //namespace boost {