timer.h

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/****************************************************************************
 *
 *  Copyright (C) 2000-2001 RealNetworks, Inc. All rights reserved.
 *
 *  This program is free software.  It may be distributed under the terms
 *  in the file LICENSE, found in the top level of the source distribution.
 *
 */

#ifndef _TIMER_H
#define _TIMER_H

#include "types.h"
#include "tlist.h"

class CTimerResponse
{
public:
    virtual void OnTimer( void ) = 0;
};

class CTimer
{
    friend class CEventThread;

public:
    typedef enum { Disabled, SingleShot, Repeating } Mode;

    CTimer( CTimerResponse* pResponse );
    virtual ~CTimer( void );

    void    SetResponse( CTimerResponse* pResponse );
    Mode    GetMode( void );
    UINT32  GetTimeout( void );
    void    SetRelative( UINT32 msec );
    void    SetAbsolute( UINT32 t );
    void    SetRepeating( UINT32 msec );
    void    Disable( void );

    static UINT32 CurrentTime( void );

protected:
    void            Set( UINT32 t );
    CTimerResponse* GetResponse( void );

private:
    CTimerResponse* m_pResponse;
    Mode            m_mode;
    UINT32          m_next;
    UINT32          m_interval;
};

typedef TDoubleList<CTimer*> CTimerList;

#endif //ndef _TIMER_H