williamr@2: #ifndef BOOST_DETAIL_LWM_WIN32_CS_HPP_INCLUDED
williamr@2: #define BOOST_DETAIL_LWM_WIN32_CS_HPP_INCLUDED
williamr@2: 
williamr@2: // MS compatible compilers support #pragma once
williamr@2: 
williamr@2: #if defined(_MSC_VER) && (_MSC_VER >= 1020)
williamr@2: # pragma once
williamr@2: #endif
williamr@2: 
williamr@2: //
williamr@2: //  boost/detail/lwm_win32_cs.hpp
williamr@2: //
williamr@2: //  Copyright (c) 2002, 2003 Peter Dimov
williamr@2: //
williamr@2: // Distributed under the Boost Software License, Version 1.0. (See
williamr@2: // accompanying file LICENSE_1_0.txt or copy at
williamr@2: // http://www.boost.org/LICENSE_1_0.txt)
williamr@2: //
williamr@2: 
williamr@2: #ifdef BOOST_USE_WINDOWS_H
williamr@2: #  include <windows.h>
williamr@2: #endif
williamr@2: 
williamr@2: namespace boost
williamr@2: {
williamr@2: 
williamr@2: namespace detail
williamr@2: {
williamr@2: 
williamr@2: #ifndef BOOST_USE_WINDOWS_H
williamr@2: 
williamr@2: struct CRITICAL_SECTION
williamr@2: {
williamr@2:     struct critical_section_debug * DebugInfo;
williamr@2:     long LockCount;
williamr@2:     long RecursionCount;
williamr@2:     void * OwningThread;
williamr@2:     void * LockSemaphore;
williamr@2: #if defined(_WIN64)
williamr@2:     unsigned __int64 SpinCount;
williamr@2: #else
williamr@2:     unsigned long SpinCount;
williamr@2: #endif
williamr@2: };
williamr@2: 
williamr@2: extern "C" __declspec(dllimport) void __stdcall InitializeCriticalSection(CRITICAL_SECTION *);
williamr@2: extern "C" __declspec(dllimport) void __stdcall EnterCriticalSection(CRITICAL_SECTION *);
williamr@2: extern "C" __declspec(dllimport) void __stdcall LeaveCriticalSection(CRITICAL_SECTION *);
williamr@2: extern "C" __declspec(dllimport) void __stdcall DeleteCriticalSection(CRITICAL_SECTION *);
williamr@2: 
williamr@2: #endif // #ifndef BOOST_USE_WINDOWS_H
williamr@2: 
williamr@2: class lightweight_mutex
williamr@2: {
williamr@2: private:
williamr@2: 
williamr@2:     CRITICAL_SECTION cs_;
williamr@2: 
williamr@2:     lightweight_mutex(lightweight_mutex const &);
williamr@2:     lightweight_mutex & operator=(lightweight_mutex const &);
williamr@2: 
williamr@2: public:
williamr@2: 
williamr@2:     lightweight_mutex()
williamr@2:     {
williamr@2:         InitializeCriticalSection(&cs_);
williamr@2:     }
williamr@2: 
williamr@2:     ~lightweight_mutex()
williamr@2:     {
williamr@2:         DeleteCriticalSection(&cs_);
williamr@2:     }
williamr@2: 
williamr@2:     class scoped_lock;
williamr@2:     friend class scoped_lock;
williamr@2: 
williamr@2:     class scoped_lock
williamr@2:     {
williamr@2:     private:
williamr@2: 
williamr@2:         lightweight_mutex & m_;
williamr@2: 
williamr@2:         scoped_lock(scoped_lock const &);
williamr@2:         scoped_lock & operator=(scoped_lock const &);
williamr@2: 
williamr@2:     public:
williamr@2: 
williamr@2:         explicit scoped_lock(lightweight_mutex & m): m_(m)
williamr@2:         {
williamr@2:             EnterCriticalSection(&m_.cs_);
williamr@2:         }
williamr@2: 
williamr@2:         ~scoped_lock()
williamr@2:         {
williamr@2:             LeaveCriticalSection(&m_.cs_);
williamr@2:         }
williamr@2:     };
williamr@2: };
williamr@2: 
williamr@2: } // namespace detail
williamr@2: 
williamr@2: } // namespace boost
williamr@2: 
williamr@2: #endif // #ifndef BOOST_DETAIL_LWM_WIN32_CS_HPP_INCLUDED