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interprocess_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\interprocess_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. ////////////////////////////////////////////////////////////////////////////// #ifndef BOOST_INTERPROCESS_MUTEX_HPP #define BOOST_INTERPROCESS_MUTEX_HPP #if (defined _MSC_VER) && (_MSC_VER >= 1200) # pragma once #endif #include
#include
#include
#include
#if defined BOOST_INTERPROCESS_POSIX_PROCESS_SHARED #include
#include
#include
#define BOOST_INTERPROCESS_USE_POSIX #else #include
#include
#include
#define BOOST_INTERPROCESS_USE_GENERIC_EMULATION #endif //!\file //!Describes a mutex class that can be placed in memory shared by //!several processes. namespace boost { namespace interprocess { class interprocess_condition; //!Wraps a interprocess_mutex that can be placed in shared memory and can be //!shared between processes. Allows timed lock tries class interprocess_mutex { /// @cond //Non-copyable interprocess_mutex(const interprocess_mutex &); interprocess_mutex &operator=(const interprocess_mutex &); friend class interprocess_condition; /// @endcond public: //!Constructor. //!Throws interprocess_exception on error. interprocess_mutex(); //!Destructor. If any process uses the mutex after the destructor is called //!the result is undefined. Does not throw. ~interprocess_mutex(); //!Effects: The calling thread tries to obtain ownership of the mutex, and //! if another thread has ownership of the mutex, it waits until it can //! obtain the ownership. If a thread takes ownership of the mutex the //! mutex must be unlocked by the same mutex. //!Throws: interprocess_exception on error. void lock(); //!Effects: The calling thread tries to obtain ownership of the mutex, and //! if another thread has ownership of the mutex returns immediately. //!Returns: If the thread acquires ownership of the mutex, returns true, if //! the another thread has ownership of the mutex, returns false. //!Throws: interprocess_exception on error. bool try_lock(); //!Effects: The calling thread will try to obtain exclusive ownership of the //! mutex if it can do so in until the specified time is reached. If the //! mutex supports recursive locking, the mutex must be unlocked the same //! number of times it is locked. //!Returns: If the thread acquires ownership of the mutex, returns true, if //! the timeout expires returns false. //!Throws: interprocess_exception on error. bool timed_lock(const boost::posix_time::ptime &abs_time); //!Effects: The calling thread releases the exclusive ownership of the mutex. //!Throws: interprocess_exception on error. void unlock(); /// @cond private: #if defined(BOOST_INTERPROCESS_USE_GENERIC_EMULATION) volatile boost::uint32_t m_s; #elif defined(BOOST_INTERPROCESS_USE_POSIX) pthread_mutex_t m_mut; #endif //#if (defined BOOST_WINDOWS) && !(defined BOOST_DISABLE_WIN32) /// @endcond }; } //namespace interprocess { } //namespace boost { #ifdef BOOST_INTERPROCESS_USE_GENERIC_EMULATION # undef BOOST_INTERPROCESS_USE_GENERIC_EMULATION # include
#endif #ifdef BOOST_INTERPROCESS_USE_POSIX # undef BOOST_INTERPROCESS_USE_POSIX # include
#endif #include
#endif //BOOST_INTERPROCESS_MUTEX_HPP
interprocess_mutex.hpp
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