private TimerExtension GetTimerExtension(ActivityContext context)
{
TimerExtension timerExtension = context.GetExtension <TimerExtension>();
Fx.Assert(timerExtension != null, "TimerExtension must exist.");
return(timerExtension);
}
protected override void Cancel(NativeActivityContext context)
{
Bookmark timerBookmark = _timerBookmark.Get(context);
TimerExtension timerExtension = GetTimerExtension(context);
timerExtension.CancelTimer(timerBookmark);
context.RemoveBookmark(timerBookmark);
context.MarkCanceled();
}
protected override void Abort(NativeActivityAbortContext context)
{
Bookmark timerBookmark = _timerBookmark.Get(context);
// The bookmark could be null in abort when user passed in a negative delay as a duration
if (timerBookmark != null)
{
TimerExtension timerExtension = GetTimerExtension(context);
timerExtension.CancelTimer(timerBookmark);
}
base.Abort(context);
}
protected override void Execute(NativeActivityContext context)
{
TimeSpan duration = this.Duration.Get(context);
if (duration < TimeSpan.Zero)
{
throw CoreWf.Internals.FxTrace.Exception.ArgumentOutOfRange("Duration", duration, SR.DurationIsNegative(this.DisplayName));
}
if (duration == TimeSpan.Zero)
{
return;
}
TimerExtension timerExtension = GetTimerExtension(context);
Bookmark bookmark = context.CreateBookmark();
timerExtension.RegisterTimer(duration, bookmark);
_timerBookmark.Set(context, bookmark);
}