Chris@16: /*
Chris@101:  *          Copyright Andrey Semashev 2007 - 2015.
Chris@16:  * Distributed under the Boost Software License, Version 1.0.
Chris@16:  *    (See accompanying file LICENSE_1_0.txt or copy at
Chris@16:  *          http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  */
Chris@16: /*!
Chris@16:  * \file   light_rw_mutex.hpp
Chris@16:  * \author Andrey Semashev
Chris@16:  * \date   24.03.2009
Chris@16:  *
Chris@16:  * \brief  This header is the Boost.Log library implementation, see the library documentation
Chris@16:  *         at http://www.boost.org/doc/libs/release/libs/log/doc/html/index.html.
Chris@16:  */
Chris@16: 
Chris@16: #ifndef BOOST_LOG_DETAIL_LIGHT_RW_MUTEX_HPP_INCLUDED_
Chris@16: #define BOOST_LOG_DETAIL_LIGHT_RW_MUTEX_HPP_INCLUDED_
Chris@16: 
Chris@16: #include <boost/log/detail/config.hpp>
Chris@16: 
Chris@16: #ifdef BOOST_HAS_PRAGMA_ONCE
Chris@16: #pragma once
Chris@16: #endif
Chris@16: 
Chris@16: #ifndef BOOST_LOG_NO_THREADS
Chris@16: 
Chris@16: #include <boost/log/detail/header.hpp>
Chris@16: 
Chris@16: #if defined(BOOST_THREAD_POSIX) // This one can be defined by users, so it should go first
Chris@16: #define BOOST_LOG_LWRWMUTEX_USE_PTHREAD
Chris@16: #elif defined(BOOST_WINDOWS) && defined(BOOST_LOG_USE_WINNT6_API)
Chris@16: #define BOOST_LOG_LWRWMUTEX_USE_SRWLOCK
Chris@16: #elif defined(BOOST_HAS_PTHREADS)
Chris@16: #define BOOST_LOG_LWRWMUTEX_USE_PTHREAD
Chris@16: #endif
Chris@16: 
Chris@16: #if defined(BOOST_LOG_LWRWMUTEX_USE_SRWLOCK)
Chris@16: 
Chris@16: #if defined(BOOST_USE_WINDOWS_H)
Chris@16: 
Chris@16: #ifndef _WIN32_WINNT
Chris@16: #define _WIN32_WINNT 0x0600 // _WIN32_WINNT_LONGHORN
Chris@16: #endif
Chris@16: 
Chris@16: #include <windows.h>
Chris@16: 
Chris@16: #else // defined(BOOST_USE_WINDOWS_H)
Chris@16: 
Chris@16: namespace boost {
Chris@16: 
Chris@16: BOOST_LOG_OPEN_NAMESPACE
Chris@16: 
Chris@16: namespace aux {
Chris@16: 
Chris@16: extern "C" {
Chris@16: 
Chris@16: struct SRWLOCK { void* p; };
Chris@16: __declspec(dllimport) void __stdcall InitializeSRWLock(SRWLOCK*);
Chris@16: __declspec(dllimport) void __stdcall ReleaseSRWLockExclusive(SRWLOCK*);
Chris@16: __declspec(dllimport) void __stdcall ReleaseSRWLockShared(SRWLOCK*);
Chris@16: __declspec(dllimport) void __stdcall AcquireSRWLockExclusive(SRWLOCK*);
Chris@16: __declspec(dllimport) void __stdcall AcquireSRWLockShared(SRWLOCK*);
Chris@16: 
Chris@16: } // extern "C"
Chris@16: 
Chris@16: } // namespace aux
Chris@16: 
Chris@16: BOOST_LOG_CLOSE_NAMESPACE // namespace log
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif // BOOST_USE_WINDOWS_H
Chris@16: 
Chris@16: namespace boost {
Chris@16: 
Chris@16: BOOST_LOG_OPEN_NAMESPACE
Chris@16: 
Chris@16: namespace aux {
Chris@16: 
Chris@16: //! A light read/write mutex that uses WinNT 6 and later APIs
Chris@16: class light_rw_mutex
Chris@16: {
Chris@16:     SRWLOCK m_Mutex;
Chris@16: 
Chris@16: public:
Chris@16:     light_rw_mutex()
Chris@16:     {
Chris@16:         InitializeSRWLock(&m_Mutex);
Chris@16:     }
Chris@16:     void lock_shared()
Chris@16:     {
Chris@16:         AcquireSRWLockShared(&m_Mutex);
Chris@16:     }
Chris@16:     void unlock_shared()
Chris@16:     {
Chris@16:         ReleaseSRWLockShared(&m_Mutex);
Chris@16:     }
Chris@16:     void lock()
Chris@16:     {
Chris@16:         AcquireSRWLockExclusive(&m_Mutex);
Chris@16:     }
Chris@16:     void unlock()
Chris@16:     {
Chris@16:         ReleaseSRWLockExclusive(&m_Mutex);
Chris@16:     }
Chris@16: 
Chris@16:     // Noncopyable
Chris@16:     BOOST_DELETED_FUNCTION(light_rw_mutex(light_rw_mutex const&))
Chris@16:     BOOST_DELETED_FUNCTION(light_rw_mutex& operator= (light_rw_mutex const&))
Chris@16: };
Chris@16: 
Chris@16: } // namespace aux
Chris@16: 
Chris@16: BOOST_LOG_CLOSE_NAMESPACE // namespace log
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #elif defined(BOOST_LOG_LWRWMUTEX_USE_PTHREAD)
Chris@16: 
Chris@16: #include <pthread.h>
Chris@16: 
Chris@16: namespace boost {
Chris@16: 
Chris@16: BOOST_LOG_OPEN_NAMESPACE
Chris@16: 
Chris@16: namespace aux {
Chris@16: 
Chris@16: //! A light read/write mutex that maps directly onto POSIX threading library
Chris@16: class light_rw_mutex
Chris@16: {
Chris@16:     pthread_rwlock_t m_Mutex;
Chris@16: 
Chris@16: public:
Chris@16:     light_rw_mutex()
Chris@16:     {
Chris@16:         pthread_rwlock_init(&m_Mutex, NULL);
Chris@16:     }
Chris@16:     ~light_rw_mutex()
Chris@16:     {
Chris@16:         pthread_rwlock_destroy(&m_Mutex);
Chris@16:     }
Chris@16:     void lock_shared()
Chris@16:     {
Chris@16:         pthread_rwlock_rdlock(&m_Mutex);
Chris@16:     }
Chris@16:     void unlock_shared()
Chris@16:     {
Chris@16:         pthread_rwlock_unlock(&m_Mutex);
Chris@16:     }
Chris@16:     void lock()
Chris@16:     {
Chris@16:         pthread_rwlock_wrlock(&m_Mutex);
Chris@16:     }
Chris@16:     void unlock()
Chris@16:     {
Chris@16:         pthread_rwlock_unlock(&m_Mutex);
Chris@16:     }
Chris@16: 
Chris@16:     // Noncopyable
Chris@16:     BOOST_DELETED_FUNCTION(light_rw_mutex(light_rw_mutex const&))
Chris@16:     BOOST_DELETED_FUNCTION(light_rw_mutex& operator= (light_rw_mutex const&))
Chris@16: };
Chris@16: 
Chris@16: } // namespace aux
Chris@16: 
Chris@16: BOOST_LOG_CLOSE_NAMESPACE // namespace log
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #else
Chris@16: 
Chris@16: namespace boost {
Chris@16: 
Chris@16: BOOST_LOG_OPEN_NAMESPACE
Chris@16: 
Chris@16: namespace aux {
Chris@16: 
Chris@16: //! A light read/write mutex
Chris@16: class light_rw_mutex
Chris@16: {
Chris@16:     struct { void* p; } m_Mutex;
Chris@16: 
Chris@16: public:
Chris@16:     BOOST_LOG_API light_rw_mutex();
Chris@16:     BOOST_LOG_API ~light_rw_mutex();
Chris@16:     BOOST_LOG_API void lock_shared();
Chris@16:     BOOST_LOG_API void unlock_shared();
Chris@16:     BOOST_LOG_API void lock();
Chris@16:     BOOST_LOG_API void unlock();
Chris@16: 
Chris@16:     // Noncopyable
Chris@16:     BOOST_DELETED_FUNCTION(light_rw_mutex(light_rw_mutex const&))
Chris@16:     BOOST_DELETED_FUNCTION(light_rw_mutex& operator= (light_rw_mutex const&))
Chris@16: };
Chris@16: 
Chris@16: } // namespace aux
Chris@16: 
Chris@16: BOOST_LOG_CLOSE_NAMESPACE // namespace log
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: #include <boost/log/detail/footer.hpp>
Chris@16: 
Chris@16: #endif // BOOST_LOG_NO_THREADS
Chris@16: 
Chris@16: #endif // BOOST_LOG_DETAIL_LIGHT_RW_MUTEX_HPP_INCLUDED_