public void GetResult ()
{
- if (task.Status != TaskStatus.RanToCompletion) {
+ if (!task.IsCompleted)
+ task.WaitCore (Timeout.Infinite, CancellationToken.None, true);
+
+ if (task.Status != TaskStatus.RanToCompletion)
// Merge current and dispatched stack traces if there is any
ExceptionDispatchInfo.Capture (HandleUnexpectedTaskResult (task)).Throw ();
- }
}
internal static Exception HandleUnexpectedTaskResult (Task task)
{
switch (task.Status) {
case TaskStatus.Canceled:
+ // Use original exception when we have one
+ if (task.ExceptionSlot.Exception != null)
+ goto case TaskStatus.Faulted;
+
return new TaskCanceledException (task);
case TaskStatus.Faulted:
- return task.Exception.InnerException;
+ return task.ExceptionSlot.Exception.InnerException;
default:
- return new InvalidOperationException ("The task has not finished yet");
+ throw new ArgumentException (string.Format ("Unexpected task `{0}' status `{1}'", task.Id, task.Status));
}
}
internal static void HandleOnCompleted (Task task, Action continuation, bool continueOnSourceContext, bool manageContext)
{
- if (continueOnSourceContext && SynchronizationContext.Current != null) {
+ if (continueOnSourceContext && SynchronizationContext.Current != null && SynchronizationContext.Current.GetType () != typeof (SynchronizationContext)) {
task.ContinueWith (new SynchronizationContextContinuation (continuation, SynchronizationContext.Current));
} else {
- task.ContinueWith (new ActionContinuation (continuation));
+ IContinuation cont;
+ Task cont_task;
+ if (continueOnSourceContext && !TaskScheduler.IsDefault) {
+ cont_task = new Task (TaskActionInvoker.Create (continuation), null, CancellationToken.None, TaskCreationOptions.None, null);
+ cont_task.SetupScheduler (TaskScheduler.Current);
+ cont = new SchedulerAwaitContinuation (cont_task);
+ } else {
+ cont_task = null;
+ cont = new AwaiterActionContinuation (continuation);
+ }
+
+ //
+ // This is awaiter continuation. For finished tasks we get false result and need to
+ // queue the continuation otherwise the task would block
+ //
+ if (task.ContinueWith (cont, false))
+ return;
+
+ if (cont_task == null) {
+ cont_task = new Task (TaskActionInvoker.Create (continuation), null, CancellationToken.None, TaskCreationOptions.None, null);
+ cont_task.SetupScheduler (TaskScheduler.Current);
+ }
+
+ cont_task.Schedule (true);
}
}