#ifndef BOOST_DETAIL_LWM_WIN32_CS_HPP_INCLUDED

#define BOOST_DETAIL_LWM_WIN32_CS_HPP_INCLUDED

// MS compatible compilers support #pragma once

#if defined(_MSC_VER) && (_MSC_VER >= 1020)

# pragma once

#endif

//

//  boost/detail/lwm_win32_cs.hpp

//

//  Copyright (c) 2002, 2003 Peter Dimov

//

// 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)

//

#ifdef BOOST_USE_WINDOWS_H

#  include <windows.h>

#endif

namespace boost

{

namespace detail

{

#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) void __stdcall LeaveCriticalSection(CRITICAL_SECTION *);

extern "C" __declspec(dllimport) void __stdcall DeleteCriticalSection(CRITICAL_SECTION *);

#endif // #ifndef BOOST_USE_WINDOWS_H

class lightweight_mutex

{

private:

    CRITICAL_SECTION cs_;

    lightweight_mutex(lightweight_mutex const &);

    lightweight_mutex & operator=(lightweight_mutex const &);

public:

    lightweight_mutex()

    {

        InitializeCriticalSection(&cs_);

    }

    ~lightweight_mutex()

    {

        DeleteCriticalSection(&cs_);

    }

    class scoped_lock;

    friend class scoped_lock;

    class scoped_lock

    {

    private:

        lightweight_mutex & m_;

        scoped_lock(scoped_lock const &);

        scoped_lock & operator=(scoped_lock const &);

    public:

        explicit scoped_lock(lightweight_mutex & m): m_(m)

        {

            EnterCriticalSection(&m_.cs_);

        }

        ~scoped_lock()

        {

            LeaveCriticalSection(&m_.cs_);

        }

    };

};

} // namespace detail

} // namespace boost

#endif // #ifndef BOOST_DETAIL_LWM_WIN32_CS_HPP_INCLUDED