ucommon/atomic.h

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// Copyright (C) 2006-2010 David Sugar, Tycho Softworks.
//
// This file is part of GNU uCommon C++.
//
// GNU uCommon C++ is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published 
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU uCommon C++ is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with GNU uCommon C++.  If not, see <http://www.gnu.org/licenses/>.

#ifndef _UCOMMON_ATOMIC_H_
#define _UCOMMON_ATOMIC_H_

#ifndef _UCOMMON_CONFIG_H_
#include <ucommon/platform.h>
#endif

NAMESPACE_UCOMMON

class __EXPORT atomic
{
public:
    static const bool simulated;

    class __EXPORT counter
    {
    private:
        volatile long value;
    
    public:
        counter(long initial = 0);

        long operator++();
        long operator--();
        long operator+=(long offset);
        long operator-=(long offset);

        inline operator long()
            {return (long)(value);};

        inline long operator*()
            {return value;};
    };

    class __EXPORT spinlock
    {
    private:
        volatile long value;

    public:
        spinlock();

        bool acquire(void);

        void release(void);
    };
};

END_NAMESPACE

#endif

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