private void QueueInternal(ScheduledAction scheduledAction)
{
lock (_actions)
{
var pos = _actions.BinarySearch(scheduledAction, ScheduledAction.Comparer);
pos = pos >= 0 ? pos : ~pos;
_actions.Insert(pos, scheduledAction);
if (pos == 0)
{
_resetEvent.Set();
}
}
}
private void Remove(ScheduledAction scheduledAction)
{
var pos = _actions.BinarySearch(scheduledAction, ScheduledAction.Comparer);
scheduledAction.Release();
if (pos >= 0)
{
_actions.RemoveAt(pos);
}
if (pos == 0)
{
_resetEvent.Set();
}
}
public void Start()
{
_isStopped = false;
ThreadPool.QueueUserWorkItem(state => {
ScheduledAction scheduledAction = null;
while (!_isStopped)
{
bool any;
lock (_actions)
{
any = _actions.Count > 0;
if (any)
{
scheduledAction = _actions[0];
}
}
TimeSpan timeToWait;
if (any)
{
var runTime = scheduledAction.NextExecutionDate;
var dT = runTime - DateTimeProvider.UtcNow;
timeToWait = dT > TimeSpan.Zero ? dT : TimeSpan.Zero;
}
else
{
timeToWait = TimeSpan.FromMilliseconds(-1);
}
if (_resetEvent.WaitOne(timeToWait, false))
{
continue;
}
Debug.Assert(scheduledAction != null, "scheduledAction != null");
scheduledAction.Execute();
lock (_actions)
{
Remove(scheduledAction);
if (scheduledAction.Repeat)
{
QueueForever(scheduledAction.Action, scheduledAction.Interval);
}
}
}
});
}
public void QueueOneTime(Action action, TimeSpan interval)
{
QueueInternal(ScheduledAction.Create(action, interval, false));
}
public void QueueForever(Action action, TimeSpan interval)
{
QueueInternal(ScheduledAction.Create(action, interval, true));
}
