SharedQueue.h

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/*
 * SharedQueue.h
 *
 * Smalltalk like class library for C++
 * Data queue with reader-writer synchronization. Header.
 *
 * Copyright (c) 2005 Milan Cermak
 */
/*
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#ifndef __SHAREDQUEUE_H
#define __SHAREDQUEUE_H

#include <stlib/OrderedCollection.h>
#include <stlib/String.h>

namespace OS {

class Semaphore;

class SharedQueue : public Core::Object
{
  protected:
    OrderedCollection *content;
    Semaphore *emptySemaphore;
    Semaphore *accessLock;

  public:
    SharedQueue(long size = 2);

    /* Class-accessing protocol */
    virtual String *className(void) const;

    /* Accessing protocol */
    virtual Object *next(void);
    virtual void nextPut(Object *object);
    virtual Object *peek(void);
    virtual long size(void);

    /* Testing protocol */
    virtual bool isEmpty(void);
};

};

#endif /* __SHAREDQUEUE_H */

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