internal bool InternalStart(TaskScheduler scheduler, bool inline, bool throwSchedulerExceptions)
{
ExecutingTaskScheduler = scheduler;
var result = Interlocked.CompareExchange(ref _status, (int)TaskStatus.WaitingForActivation, (int)TaskStatus.Created);
if (result != (int)TaskStatus.Created && result != (int)TaskStatus.WaitingForActivation)
{
return(false);
}
var didInline = false;
try
{
if (inline)
{
// Should I worry about this task being a continuation?
// WaitAntecedent(CancellationToken);
didInline = scheduler.InernalTryExecuteTaskInline(this, IsScheduled);
}
if (!didInline)
{
scheduler.QueueTask(this);
Interlocked.CompareExchange(ref _status, (int)TaskStatus.WaitingToRun, (int)TaskStatus.WaitingForActivation);
}
else
{
PrivateWait(CancellationToken, false);
}
}
catch (ThreadAbortException exception)
{
if (!didInline)
{
AddException(exception);
FinishThreadAbortedTask(true, false);
}
}
catch (Exception exception)
{
var taskSchedulerException = new TaskSchedulerException(exception);
RecordException(taskSchedulerException);
if (throwSchedulerExceptions)
{
throw taskSchedulerException;
}
}
return(true);
}
public bool Wait(int milliseconds, CancellationToken cancellationToken)
{
if (milliseconds < -1)
{
throw new ArgumentOutOfRangeException("milliseconds");
}
if (milliseconds == -1)
{
Wait(cancellationToken);
return(true);
}
var start = ThreadingHelper.TicksNow();
do
{
CancellationCheck(cancellationToken);
switch (Status)
{
case TaskStatus.WaitingForActivation:
WaitAntecedent(cancellationToken, milliseconds, start);
ExecutingTaskScheduler.InernalTryExecuteTaskInline(this, true);
break;
case TaskStatus.Created:
case TaskStatus.WaitingToRun:
case TaskStatus.Running:
case TaskStatus.WaitingForChildrenToComplete:
var waitHandle = _waitHandle.Value;
if (_waitHandle.IsAlive)
{
waitHandle.Wait
(
TimeSpan.FromMilliseconds
(
milliseconds - ThreadingHelper.Milliseconds(ThreadingHelper.TicksNow() - start)
),
cancellationToken
);
}
break;
case TaskStatus.RanToCompletion:
return(true);
case TaskStatus.Canceled:
ThrowIfExceptional(true);
return(true);
case TaskStatus.Faulted:
ThrowIfExceptional(true);
return(true);
}
} while (ThreadingHelper.Milliseconds(ThreadingHelper.TicksNow() - start) < milliseconds);
switch (Status)
{
case TaskStatus.RanToCompletion:
return(true);
case TaskStatus.Canceled:
ThrowIfExceptional(true);
return(true);
case TaskStatus.Faulted:
ThrowIfExceptional(true);
return(true);
default:
return(false);
}
}
