120 lines
2.6 KiB
Plaintext
120 lines
2.6 KiB
Plaintext
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#ifndef BOOST_SMART_PTR_DETAIL_LWM_WIN32_CS_HPP_INCLUDED
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#define BOOST_SMART_PTR_DETAIL_LWM_WIN32_CS_HPP_INCLUDED
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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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//
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// boost/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) Microsoft Corporation 2014
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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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#include <boost/predef.h>
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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 detail
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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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#if BOOST_PLAT_WINDOWS_RUNTIME
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extern "C" __declspec(dllimport) void __stdcall InitializeCriticalSectionEx(critical_section *, unsigned long, unsigned long);
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#else
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extern "C" __declspec(dllimport) void __stdcall InitializeCriticalSection(critical_section *);
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#endif
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extern "C" __declspec(dllimport) void __stdcall EnterCriticalSection(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 lightweight_mutex
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{
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private:
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critical_section cs_;
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lightweight_mutex(lightweight_mutex const &);
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lightweight_mutex & operator=(lightweight_mutex const &);
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public:
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lightweight_mutex()
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{
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#if BOOST_PLAT_WINDOWS_RUNTIME
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InitializeCriticalSectionEx(&cs_, 4000, 0);
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#else
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InitializeCriticalSection(&cs_);
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#endif
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}
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~lightweight_mutex()
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{
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DeleteCriticalSection(&cs_);
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}
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class scoped_lock;
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friend class scoped_lock;
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class scoped_lock
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{
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private:
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lightweight_mutex & m_;
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scoped_lock(scoped_lock const &);
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scoped_lock & operator=(scoped_lock const &);
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public:
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explicit scoped_lock(lightweight_mutex & m): m_(m)
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{
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EnterCriticalSection(&m_.cs_);
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}
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~scoped_lock()
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{
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LeaveCriticalSection(&m_.cs_);
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}
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};
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};
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} // namespace detail
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} // namespace boost
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#endif // #ifndef BOOST_SMART_PTR_DETAIL_LWM_WIN32_CS_HPP_INCLUDED
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