/// <summary>
/// stop previously started timer
/// </summary>
/// <param name="timer">
/// A <see cref="Timer"/>
/// </param>
/// <param name="timerId">
/// A <see cref="System.Int64"/>
/// Value returned by StartTimer()
/// Timer list reuse refernces (objects) of type Timer. Reference to Timer object
/// is not enough to make sure that you stop the correct timer. Value timerId
/// is a unique (system level) timer identifier
/// </param>
/// <returns>
/// A <see cref="System.Boolean"/>
/// Returns true if the timer was running and now stopped
/// Call to this method for already stoped timer will return false
/// and error message will be printed on the console
/// </returns>
public bool Stop(ITimer iTimer, long timerId)
{
Timers.Error error = Timers.Error.NONE;
Timer timer = (Timer)iTimer;
lock (this)
{
countStopAttempt++;
if ((timer.Running) && (timer.TimerId == timerId))
{
countStop++;
timer.Running = false;
}
else if (!timer.Running)
{
error = Timers.Error.ALREADY_STOPED;
}
else if (timer.TimerId != timerId)
{
error = Timers.Error.STOP_UNKNOWN;
}
}
if (error != Timers.Error.NONE)
{
PrintError("Stop failed ", error);
}
return(error == Timers.Error.NONE);
}
protected void PrintError(string prefix, Timers.Error error)
{
System.Console.WriteLine(prefix + EnumUtils.GetDescription(error));
}
/// <summary>
/// Allocate a free timer from the stack of free timers, set expiration
/// add the timer to end of the list of running timers
/// </summary>
/// <param name="timeout">
/// A <see cref="System.Int64"/>
/// </param>
/// <param name="timer">
/// A <see cref="Timer"/>
/// Reference to the started timer. Can be used in call to Stop()
/// </param>
/// <param name="timerId">
/// A <see cref="System.Int64"/>
/// Timer list reuse refernces (objects) of type Timer. Reference to Timer is
/// not enough to make sure that you stop the correct timer. Value timerId
/// is a unique (system level) timer identifier
/// </param>
/// <param name="applicationHook">
/// A <see cref="System.Object"/>
/// Timer.applicationHook field will be set to this value
/// Field applicationHook can help to identify the timer in the context of timerExpired
/// callback
/// </param>
/// <param name="autoRestart">
/// A <see cref="System.Boolean"/>
/// If true the system will reschedule the expire timer automatically while taking care
/// that the next expiration tick is exactly startTick+2*timeout
/// </param>
/// <returns>
/// A <see cref="System.Boolean"/>
/// returns true of Ok, false is failed to allocate a new timer - no free
/// timers are available
/// </returns>
public bool Start(out ITimer iTimer, out long timerId, object applicationHook, bool autoRestart)
{
// timestamp the call as soon as possible
DateTime startTime = DateTime.Now;
long startTick = (startTime.Ticks) / TICKS_IN_MILLISECOND;
Timer timer = null;
iTimer = null;
timerId = 0;
Timers.Error error = Timers.Error.START_UNKNOWN;
do
{
// get new timer Id
timerId = TimerId.GetNext();
// allocate a timer from the stack of free timers
lock (this)
{
countStartAttempt++;
if (freeTimers.Count > 0)
{
timer = freeTimers.Pop();
}
else
{
error = Timers.Error.NO_FREE_TIMERS;
break;
}
}
// initialize the timer
timer.ApplicationHook = applicationHook;
timer.StartTick = startTick;
timer.ExpirationTime = startTick + Timeout;
timer.Running = true;
timer.TimerId = timerId;
timer.AutoRestart = autoRestart;
timer.Restarts = 1; // first start is considered a restart
iTimer = timer;
// add the timer to the queue of the pending timers
lock (this)
{
countStart++;
pendingTimers.Add(timer);
countMax = Math.Max(countMax, pendingTimers.Count);
}
// send wakeup call to the task handling the timers
timerTask.WakeupCall();
error = Timers.Error.NONE;
}while (false);
if (error != Timers.Error.NONE)
{
PrintError("Start failed ", error);
}
return(error == Timers.Error.NONE);
}
