/*
 * Copyright (C) 2007-2019 Xagasoft, All rights reserved.
 *
 * This file is part of the libbu++ library and is released under the
 * terms of the license contained in the file LICENSE.
 */

#ifndef BU_SYNCHRO_COUNTER_H
#define BU_SYNCHRO_COUNTER_H

#include "bu/mutex.h"

namespace Bu
{
    /**
     * A simple thread-safe counter class.  This is handy for assigning unique
     * IDs to objects that are being created in different threads.
     *@ingroup Threading Containers
     */
    template <class T>
    class SynchroCounter
    {
    public:
        SynchroCounter() :
            tCounter( 0 )
        {
        }
        
        virtual ~SynchroCounter()
        {
        }

        T next()
        {
            mOperate.lock();
            T tRet = tCounter;
            tCounter++;
            mOperate.unlock();

            return tRet;
        }

    private:
        T tCounter;             /**< The counter itself. */
        Mutex mOperate; /**< The master mutex, used on all operations. */
    };
}

#endif