Added boost header

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

@@ -0,0 +1,46 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2006. 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>
+#include <boost/interprocess/sync/scoped_lock.hpp>
+
+namespace boost {
+namespace interprocess {
+
+inline barrier::barrier(unsigned int count)
+   : m_threshold(count), m_count(count), m_generation(0)
+{
+   if (count == 0)
+      throw std::invalid_argument("count cannot be zero.");
+}
+
+inline barrier::~barrier(){}
+
+inline bool barrier::wait()
+{
+   scoped_lock<interprocess_mutex> lock(m_mutex);
+   unsigned int gen = m_generation;
+
+   if (--m_count == 0){
+      m_generation++;
+      m_count = m_threshold;
+      m_cond.notify_all();
+      return true;
+   }
+
+   while (gen == m_generation){
+      m_cond.wait(lock);
+   }
+   return false;
+}
+
+}  //namespace interprocess {
+}  //namespace boost {