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+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2012-2013. 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.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+#ifndef BOOST_INTERPROCESS_SYNC_DETAIL_COMMON_ALGORITHMS_HPP
+#define BOOST_INTERPROCESS_SYNC_DETAIL_COMMON_ALGORITHMS_HPP
+
+#include <boost/interprocess/detail/config_begin.hpp>
+#include <boost/interprocess/detail/workaround.hpp>
+
+#include <boost/interprocess/sync/spin/wait.hpp>
+
+namespace boost {
+namespace interprocess {
+namespace ipcdetail {
+
+template<class MutexType>
+bool try_based_timed_lock(MutexType &m, const boost::posix_time::ptime &abs_time)
+{
+ //Same as lock()
+ if(abs_time == boost::posix_time::pos_infin){
+ m.lock();
+ return true;
+ }
+ //Always try to lock to achieve POSIX guarantees:
+ // "Under no circumstance shall the function fail with a timeout if the mutex
+ // can be locked immediately. The validity of the abs_timeout parameter need not
+ // be checked if the mutex can be locked immediately."
+ else if(m.try_lock()){
+ return true;
+ }
+ else{
+ spin_wait swait;
+ while(microsec_clock::universal_time() < abs_time){
+ if(m.try_lock()){
+ return true;
+ }
+ swait.yield();
+ }
+ return false;
+ }
+}
+
+template<class MutexType>
+void try_based_lock(MutexType &m)
+{
+ if(!m.try_lock()){
+ spin_wait swait;
+ do{
+ if(m.try_lock()){
+ break;
+ }
+ else{
+ swait.yield();
+ }
+ }
+ while(1);
+ }
+}
+
+} //namespace ipcdetail
+} //namespace interprocess
+} //namespace boost
+
+#include <boost/interprocess/detail/config_end.hpp>
+
+#endif //BOOST_INTERPROCESS_SYNC_DETAIL_COMMON_ALGORITHMS_HPP