/**********************************************************************
*
* Method: waitfor()
*
* Description: Wait for the software timer to finish.
*
* Notes:
*
* Returns: 0 on success, -1 if the timer is not running.
*
**********************************************************************/
int
Timer::waitfor()
{
if (state != Active)
{
return (-1);
}
//
// Wait for the timer to expire.
//
pMutex->take();
//
// Restart or idle the timer, depending on its type.
//
if (type == Periodic)
{
state = Active;
timerList.insert(this);
}
else
{
pMutex->release();
state = Idle;
}
return (0);
} /* waitfor() */
/**********************************************************************
*
* Method: start()
*
* Description: Start a software timer, based on the tick from the
* underlying hardware timer.
*
* Notes:
*
* Returns: 0 on success, -1 if the timer is already in use.
*
**********************************************************************/
int
Timer::start(unsigned int nMilliseconds, TimerType timerType)
{
if (state != Idle)
{
return (-1);
}
//
// Take the mutex. It will be released when the timer expires.
//
pMutex->take();
//
// Initialize the timer.
//
type = timerType;
length = nMilliseconds / MS_PER_TICK;
state = Active;
//
// Add the timer to the timer list.
//
timerList.insert(this);
return (0);
} /* start() */
/**********************************************************************
*
* Method: isDone()
*
* Description: check for the software timer to finish.
*
* Notes:
*
* Returns: 1 on success, 0 if the timer is running.
*
**********************************************************************/
int
Timer::isDone()
{
#if 0
if (state != Active)
{
return (-1);
}
#endif
//
// Wait for the timer to expire.
//
if (state != Done)
return 0;
timerList.remove(this);
//
// Restart or idle the timer, depending on its type.
//
if (type == Periodic)
{
state = Active;
timerList.insert(this);
}
else
{
state = Idle;
}
return 1;
} /* isDone() */
/**********************************************************************
*
* Method: waitfor()
*
* Description: Wait for the software timer to finish.
*
* Notes:
*
* Returns: 0 on success, -1 if the timer is not running.
*
**********************************************************************/
int
Timer::waitfor()
{
if (state != Active)
{
return (-1);
}
//
// Wait for the timer to expire.
//
while (state != Done);
timerList.remove(this);
//
// Restart or idle the timer, depending on its type.
//
if (type == Periodic)
{
state = Active;
timerList.insert(this);
}
else
{
state = Idle;
}
return (0);
} /* waitfor() */
/**********************************************************************
*
* Method: start()
*
* Description: Start a software timer, based on the tick from the
* underlying hardware timer.
*
* Notes:
*
* Returns: 0 on success, -1 if the timer is already in use.
*
**********************************************************************/
int
Timer::start(unsigned int nMilliseconds, TimerType timerType)
{
if (state != Idle)
{
return (-1);
}
//
// Initialize the software timer.
//
state = Active;
type = timerType;
length = nMilliseconds / MS_PER_TICK;
//
// Add the timer to the timer list.
//
timerList.insert(this);
return (0);
} /* start() */