RTCachedString.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 __RTCachedString_h__
#define __RTCachedString_h__ included
 
#ifdef PRAGMA
#pragma interface
#endif
 
#ifndef __RTConfig_h__
#include <RTConfig.h>
#endif
 
class RTCachedString
{
public:
    RTS_INLINE              RTCachedString( void );
    explicit                RTCachedString( const char * );
                RTCachedString( const RTCachedString & );
                ~RTCachedString( void );
 
    RTS_INLINE operator     const char * ( void ) const;
 
    RTCachedString        & operator=( const char * );
    RTCachedString        & operator=( const RTCachedString & );
 
    RTS_INLINE int          operator==( const char * ) const;
    RTS_INLINE int          operator!=( const char * ) const;
    RTS_INLINE int          operator==( const RTCachedString & ) const;
    RTS_INLINE int          operator!=( const RTCachedString & ) const;
 
    struct Entry
    {
    char      * value;
    unsigned    use_count;
    };
 
    struct Block
    {
    enum { Size = 32 };
 
    Entry       entry[ Size ];
    Block     * next;
    };
 
private:
    Entry                 * _entry;
 
    static unsigned         _size;
    static unsigned         _used;
    static Entry         ** _contents;
    static Block          * _blocks;
 
    static Entry          * add( const char * );
    static void             link( Entry * );
    static void             unlink( Entry * );
 
    static void             lock( void );
    static void             unlock( void );
};
 
#if RTS_INLINES
#include <RTCachedString.inl>
#endif
 
#endif // __RTCachedString_h__