209 lines
4.3 KiB
C++
209 lines
4.3 KiB
C++
/*
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* Copyright Andrey Semashev 2007 - 2013.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*/
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/*!
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* \file light_rw_mutex.hpp
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* \author Andrey Semashev
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* \date 24.03.2009
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*
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* \brief This header is the Boost.Log library implementation, see the library documentation
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* at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
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*/
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#ifndef BOOST_LOG_DETAIL_LIGHT_RW_MUTEX_HPP_INCLUDED_
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#define BOOST_LOG_DETAIL_LIGHT_RW_MUTEX_HPP_INCLUDED_
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#include <boost/log/detail/config.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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#pragma once
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#endif
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#ifndef BOOST_LOG_NO_THREADS
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#include <boost/log/detail/header.hpp>
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#if defined(BOOST_THREAD_POSIX) // This one can be defined by users, so it should go first
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#define BOOST_LOG_LWRWMUTEX_USE_PTHREAD
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#elif defined(BOOST_WINDOWS) && defined(BOOST_LOG_USE_WINNT6_API)
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#define BOOST_LOG_LWRWMUTEX_USE_SRWLOCK
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#elif defined(BOOST_HAS_PTHREADS)
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#define BOOST_LOG_LWRWMUTEX_USE_PTHREAD
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#endif
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#if defined(BOOST_LOG_LWRWMUTEX_USE_SRWLOCK)
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#if defined(BOOST_USE_WINDOWS_H)
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#ifndef _WIN32_WINNT
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#define _WIN32_WINNT 0x0600 // _WIN32_WINNT_LONGHORN
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#endif
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#include <windows.h>
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#else // defined(BOOST_USE_WINDOWS_H)
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namespace boost {
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BOOST_LOG_OPEN_NAMESPACE
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namespace aux {
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extern "C" {
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struct SRWLOCK { void* p; };
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__declspec(dllimport) void __stdcall InitializeSRWLock(SRWLOCK*);
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__declspec(dllimport) void __stdcall ReleaseSRWLockExclusive(SRWLOCK*);
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__declspec(dllimport) void __stdcall ReleaseSRWLockShared(SRWLOCK*);
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__declspec(dllimport) void __stdcall AcquireSRWLockExclusive(SRWLOCK*);
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__declspec(dllimport) void __stdcall AcquireSRWLockShared(SRWLOCK*);
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} // extern "C"
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} // namespace aux
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BOOST_LOG_CLOSE_NAMESPACE // namespace log
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} // namespace boost
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#endif // BOOST_USE_WINDOWS_H
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namespace boost {
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BOOST_LOG_OPEN_NAMESPACE
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namespace aux {
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//! A light read/write mutex that uses WinNT 6 and later APIs
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class light_rw_mutex
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{
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SRWLOCK m_Mutex;
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public:
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light_rw_mutex()
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{
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InitializeSRWLock(&m_Mutex);
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}
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void lock_shared()
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{
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AcquireSRWLockShared(&m_Mutex);
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}
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void unlock_shared()
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{
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ReleaseSRWLockShared(&m_Mutex);
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}
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void lock()
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{
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AcquireSRWLockExclusive(&m_Mutex);
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}
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void unlock()
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{
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ReleaseSRWLockExclusive(&m_Mutex);
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}
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// Noncopyable
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BOOST_DELETED_FUNCTION(light_rw_mutex(light_rw_mutex const&))
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BOOST_DELETED_FUNCTION(light_rw_mutex& operator= (light_rw_mutex const&))
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};
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} // namespace aux
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BOOST_LOG_CLOSE_NAMESPACE // namespace log
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} // namespace boost
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#elif defined(BOOST_LOG_LWRWMUTEX_USE_PTHREAD)
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#include <pthread.h>
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namespace boost {
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BOOST_LOG_OPEN_NAMESPACE
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namespace aux {
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//! A light read/write mutex that maps directly onto POSIX threading library
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class light_rw_mutex
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{
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pthread_rwlock_t m_Mutex;
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public:
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light_rw_mutex()
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{
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pthread_rwlock_init(&m_Mutex, NULL);
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}
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~light_rw_mutex()
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{
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pthread_rwlock_destroy(&m_Mutex);
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}
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void lock_shared()
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{
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pthread_rwlock_rdlock(&m_Mutex);
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}
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void unlock_shared()
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{
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pthread_rwlock_unlock(&m_Mutex);
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}
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void lock()
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{
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pthread_rwlock_wrlock(&m_Mutex);
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}
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void unlock()
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{
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pthread_rwlock_unlock(&m_Mutex);
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}
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// Noncopyable
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BOOST_DELETED_FUNCTION(light_rw_mutex(light_rw_mutex const&))
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BOOST_DELETED_FUNCTION(light_rw_mutex& operator= (light_rw_mutex const&))
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};
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} // namespace aux
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BOOST_LOG_CLOSE_NAMESPACE // namespace log
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} // namespace boost
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#else
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namespace boost {
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BOOST_LOG_OPEN_NAMESPACE
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namespace aux {
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//! A light read/write mutex
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class light_rw_mutex
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{
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struct { void* p; } m_Mutex;
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public:
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BOOST_LOG_API light_rw_mutex();
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BOOST_LOG_API ~light_rw_mutex();
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BOOST_LOG_API void lock_shared();
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BOOST_LOG_API void unlock_shared();
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BOOST_LOG_API void lock();
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BOOST_LOG_API void unlock();
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// Noncopyable
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BOOST_DELETED_FUNCTION(light_rw_mutex(light_rw_mutex const&))
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BOOST_DELETED_FUNCTION(light_rw_mutex& operator= (light_rw_mutex const&))
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};
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} // namespace aux
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BOOST_LOG_CLOSE_NAMESPACE // namespace log
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} // namespace boost
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#endif
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#include <boost/log/detail/footer.hpp>
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#endif // BOOST_LOG_NO_THREADS
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#endif // BOOST_LOG_DETAIL_LIGHT_RW_MUTEX_HPP_INCLUDED_
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