// | |
// boost/signals2/detail/lwm_win32_cs.hpp | |
// | |
// Copyright (c) 2002, 2003 Peter Dimov | |
// Copyright (c) 2008 Frank Mori Hess | |
// | |
// 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) | |
// | |
#ifndef BOOST_SIGNALS2_LWM_WIN32_CS_HPP | |
#define BOOST_SIGNALS2_LWM_WIN32_CS_HPP | |
// MS compatible compilers support #pragma once | |
#if defined(_MSC_VER) && (_MSC_VER >= 1020) | |
# pragma once | |
#endif | |
#include <boost/assert.hpp> | |
#ifdef BOOST_USE_WINDOWS_H | |
# include <windows.h> | |
#endif | |
namespace boost | |
{ | |
namespace signals2 | |
{ | |
#ifndef BOOST_USE_WINDOWS_H | |
struct critical_section | |
{ | |
struct critical_section_debug * DebugInfo; | |
long LockCount; | |
long RecursionCount; | |
void * OwningThread; | |
void * LockSemaphore; | |
#if defined(_WIN64) | |
unsigned __int64 SpinCount; | |
#else | |
unsigned long SpinCount; | |
#endif | |
}; | |
extern "C" __declspec(dllimport) void __stdcall InitializeCriticalSection(critical_section *); | |
extern "C" __declspec(dllimport) void __stdcall EnterCriticalSection(critical_section *); | |
extern "C" __declspec(dllimport) bool __stdcall TryEnterCriticalSection(critical_section *); | |
extern "C" __declspec(dllimport) void __stdcall LeaveCriticalSection(critical_section *); | |
extern "C" __declspec(dllimport) void __stdcall DeleteCriticalSection(critical_section *); | |
#else | |
typedef ::CRITICAL_SECTION critical_section; | |
#endif // #ifndef BOOST_USE_WINDOWS_H | |
class mutex | |
{ | |
private: | |
critical_section cs_; | |
mutex(mutex const &); | |
mutex & operator=(mutex const &); | |
public: | |
mutex() | |
{ | |
InitializeCriticalSection(&cs_); | |
} | |
~mutex() | |
{ | |
DeleteCriticalSection(&cs_); | |
} | |
void lock() | |
{ | |
EnterCriticalSection(&cs_); | |
} | |
// TryEnterCriticalSection only exists on Windows NT 4.0 and later | |
#if (defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0400)) | |
bool try_lock() | |
{ | |
return TryEnterCriticalSection(&cs_) != 0; | |
} | |
#else | |
bool try_lock() | |
{ | |
BOOST_ASSERT(false); | |
return false; | |
} | |
#endif | |
void unlock() | |
{ | |
LeaveCriticalSection(&cs_); | |
} | |
}; | |
} // namespace signals2 | |
} // namespace boost | |
#endif // #ifndef BOOST_SIGNALS2_LWM_WIN32_CS_HPP |