RTQueue.h

/*
 * Licensed Materials - Property of HCL and/or IBM
 * Copyright HCL Technologies Ltd. 2016, 2021. All Rights Reserved.
 * Copyright IBM Corporation 1999, 2016. All Rights Reserved.
 *
 * U.S. Government Users Restricted Rights -  Use, duplication or 
 * disclosure restricted by GSA ADP Schedule.
 */
 
#ifndef __RTQueue_h__
#define __RTQueue_h__ included
 
#ifdef PRAGMA
#pragma interface
#endif
 
#ifndef __RTConfig_h__
#include <RTConfig.h>
#endif
 
class RTQueue
{
public:
    struct Block
    {
        enum { Size = 30 };
 
        Block * next;
        int     used;
        void  * data[ Size ];
    };
 
    class Iterator
    {
    public:
        RTS_INLINE explicit Iterator( const RTQueue & );
        RTS_INLINE          ~Iterator( void );
 
        void              * next( void );
 
    private:
        Block * block;
        int     index;
 
        // useful only to silence lint
        RTS_INLINE          Iterator( void );
    };
 
    RTS_INLINE          RTQueue( void );
    RTQueue( const RTQueue & );
    ~RTQueue( void );
 
    RTQueue           & operator=( const RTQueue & );
 
    void                add( void * );
    void                remove( void * );
    RTS_INLINE int      isEmpty( void ) const;
    int                 length( void ) const;
 
private:
    friend class Iterator;
 
    Block * head;
    Block * tail;
};
 
#if RTS_INLINES
#include <RTQueue.inl>
#endif
 
#endif // __RTQueue_h__