110 lines
2.2 KiB
C++
110 lines
2.2 KiB
C++
//
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// boost/signals2/detail/lwm_win32_cs.hpp
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//
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// Copyright (c) 2002, 2003 Peter Dimov
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// Copyright (c) 2008 Frank Mori Hess
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// 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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#ifndef BOOST_SIGNALS2_LWM_WIN32_CS_HPP
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#define BOOST_SIGNALS2_LWM_WIN32_CS_HPP
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// MS compatible compilers support #pragma once
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#if defined(_MSC_VER) && (_MSC_VER >= 1020)
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# pragma once
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#endif
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#include <boost/assert.hpp>
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#ifdef BOOST_USE_WINDOWS_H
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# include <windows.h>
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#endif
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namespace boost
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{
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namespace signals2
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{
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#ifndef BOOST_USE_WINDOWS_H
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struct critical_section
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{
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struct critical_section_debug * DebugInfo;
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long LockCount;
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long RecursionCount;
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void * OwningThread;
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void * LockSemaphore;
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#if defined(_WIN64)
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unsigned __int64 SpinCount;
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#else
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unsigned long SpinCount;
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#endif
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};
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extern "C" __declspec(dllimport) void __stdcall InitializeCriticalSection(critical_section *);
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extern "C" __declspec(dllimport) void __stdcall EnterCriticalSection(critical_section *);
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extern "C" __declspec(dllimport) bool __stdcall TryEnterCriticalSection(critical_section *);
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extern "C" __declspec(dllimport) void __stdcall LeaveCriticalSection(critical_section *);
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extern "C" __declspec(dllimport) void __stdcall DeleteCriticalSection(critical_section *);
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#else
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typedef ::CRITICAL_SECTION critical_section;
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#endif // #ifndef BOOST_USE_WINDOWS_H
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class mutex
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{
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private:
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critical_section cs_;
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mutex(mutex const &);
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mutex & operator=(mutex const &);
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public:
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mutex()
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{
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InitializeCriticalSection(&cs_);
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}
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~mutex()
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{
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DeleteCriticalSection(&cs_);
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}
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void lock()
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{
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EnterCriticalSection(&cs_);
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}
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// TryEnterCriticalSection only exists on Windows NT 4.0 and later
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#if (defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0400))
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bool try_lock()
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{
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return TryEnterCriticalSection(&cs_) != 0;
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}
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#else
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bool try_lock()
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{
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BOOST_ASSERT(false);
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return false;
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}
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#endif
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void unlock()
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{
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LeaveCriticalSection(&cs_);
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}
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};
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} // namespace signals2
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} // namespace boost
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#endif // #ifndef BOOST_SIGNALS2_LWM_WIN32_CS_HPP
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