Added thirdparty: boost library

2026-08-08 16:37:51 +00:00 · 2024-01-06 19:55:56 +02:00
parent bf49f439e1
commit bccd1e7051
15683 changed files with 3239840 additions and 0 deletions
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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
+
+#ifndef BOOST_CONFIG_HPP
+#  include <boost/config.hpp>
+#endif
+#
+#if defined(BOOST_HAS_PRAGMA_ONCE)
+#  pragma once
+#endif
+
+#include <boost/interprocess/detail/config_begin.hpp>
+#include <boost/interprocess/detail/workaround.hpp>
+
+#include <boost/interprocess/sync/spin/wait.hpp>
+#include <boost/interprocess/detail/timed_utils.hpp>
+
+namespace boost {
+namespace interprocess {
+namespace ipcdetail {
+
+template<class MutexType, class TimePoint>
+bool try_based_timed_lock(MutexType &m, const TimePoint &abs_time)
+{
+   //Same as lock()
+   if(is_pos_infinity(abs_time)){
+      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<TimePoint>::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);
+   }
+}
+
+template<class MutexType>
+void timeout_when_locking_aware_lock(MutexType &m)
+{
+   #ifdef BOOST_INTERPROCESS_ENABLE_TIMEOUT_WHEN_LOCKING
+      if (!m.timed_lock(microsec_clock<ustime>::universal_time()
+           + usduration_milliseconds(BOOST_INTERPROCESS_TIMEOUT_WHEN_LOCKING_DURATION_MS)))
+      {
+         throw interprocess_exception(timeout_when_locking_error
+                                     , "Interprocess mutex timeout when locking. Possible deadlock: "
+                                       "owner died without unlocking?");
+      }
+   #else
+      m.lock();
+   #endif
+}
+
+}  //namespace ipcdetail
+}  //namespace interprocess
+}  //namespace boost
+
+#include <boost/interprocess/detail/config_end.hpp>
+
+#endif   //BOOST_INTERPROCESS_SYNC_DETAIL_COMMON_ALGORITHMS_HPP