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interprocess_recursive_mutex.hpp - Hosted on DriveHQ Cloud IT Platform
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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\interprocess\sync\emulation\interprocess_recursive_mutex.hpp
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////////////////////////////////////////////////////////////////////////////// // // (C) Copyright Ion Gaztanaga 2005-2008. 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. ////////////////////////////////////////////////////////////////////////////// #include
#include
#include
namespace boost { namespace interprocess { inline interprocess_recursive_mutex::interprocess_recursive_mutex() : m_nLockCount(0), m_nOwner(detail::get_invalid_thread_id()){} inline interprocess_recursive_mutex::~interprocess_recursive_mutex(){} inline void interprocess_recursive_mutex::lock() { detail::OS_thread_id_t th_id = detail::get_current_thread_id(); if(detail::equal_thread_id(th_id, m_nOwner)){ if((unsigned int)(m_nLockCount+1) == 0){ //Overflow, throw an exception throw interprocess_exception(); } ++m_nLockCount; } else{ m_mutex.lock(); m_nOwner = th_id; m_nLockCount = 1; } } inline bool interprocess_recursive_mutex::try_lock() { detail::OS_thread_id_t th_id = detail::get_current_thread_id(); if(detail::equal_thread_id(th_id, m_nOwner)) { // we own it if((unsigned int)(m_nLockCount+1) == 0){ //Overflow, throw an exception throw interprocess_exception(); } ++m_nLockCount; return true; } if(m_mutex.try_lock()){ m_nOwner = th_id; m_nLockCount = 1; return true; } return false; } inline bool interprocess_recursive_mutex::timed_lock(const boost::posix_time::ptime &abs_time) { detail::OS_thread_id_t th_id = detail::get_current_thread_id(); if(detail::equal_thread_id(th_id, m_nOwner)) { // we own it if((unsigned int)(m_nLockCount+1) == 0){ //Overflow, throw an exception throw interprocess_exception(); } ++m_nLockCount; return true; } if(m_mutex.timed_lock(abs_time)){ m_nOwner = th_id; m_nLockCount = 1; return true; } return false; } inline void interprocess_recursive_mutex::unlock() { assert(detail::equal_thread_id(detail::get_current_thread_id(), m_nOwner)); --m_nLockCount; if(!m_nLockCount){ m_nOwner = detail::get_invalid_thread_id(); m_mutex.unlock(); } } } //namespace interprocess { } //namespace boost {
interprocess_recursive_mutex.hpp
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