/// <summary>
/// Executes the task on the action block.
/// </summary>
/// <typeparam name="T">the return type of the task</typeparam>
/// <param name="taskFactory">the function which generates the task to execute</param>
/// <returns>a task representing the result of the task execution</returns>
public Task <T> Execute <T>(Func <Task <T> > taskFactory, int priority = 0)
{
int depth = 1;
priority *= 2;
if (asyncLocalDepth.Value != null)
{
priority++;
depth = asyncLocalDepth.Value.Value + 1;
}
tracker.OnStart();
TaskCompletionSource <T> completionSource = new TaskCompletionSource <T>();
priorityQueues[priority].Add(new Func <Task>(async() =>
{
asyncLocalDepth.Value = new Holder <int>()
{
Value = depth
};
try
{
var result = await taskFactory().ConfigureAwait(continueOnCapturedContext: false);
tracker.OnComplete();
completionSource.SetResult(result);
}
catch (OperationCanceledException)
{
tracker.OnComplete();
completionSource.SetCanceled();
}
catch (Exception ex)
{
tracker.OnComplete();
completionSource.SetException(ex);
}
}));
operationBlock.Post(true);
return(completionSource.Task);
}
public CompletionHandle(CompletionTracker tracker)
{
this.tracker = tracker;
tracker.OnStart();
}
