/// <summary>
/// When overridden in a derived class, dispatches an asynchronous message to a synchronization context.
/// </summary>
/// <param name="d">The <see cref="SendOrPostCallback" /> delegate to call.</param>
/// <param name="state">The object passed to the delegate.</param>
public override void Post(SendOrPostCallback d, object state)
{
// Queue the item and don't wait for its execution.
// TODO: This is risky because an unhandled exception will terminate the main thread. Use with caution.
var item = new SendOrPostCallbackItem(d, state, ExecutionType.Post);
MessageQueue.PushMessage(item);
}
/// <summary>
/// When overridden in a derived class, dispatches a synchronous message to a synchronization context.
/// </summary>
/// <param name="d">The <see cref="SendOrPostCallback" /> delegate to call.</param>
/// <param name="state">The object passed to the delegate. </param>
public override void Send(SendOrPostCallback d, object state)
{
var item = new SendOrPostCallbackItem(d, state, ExecutionType.Send);
MessageQueue.PushMessage(item);
item.ExecutionCompleteWaitHandle.WaitOne();
if (item.ExecutedWithException)
{
throw item.Exception;
}
}
/// <summary>
/// Pushes the specified item onto this instance.
/// </summary>
/// <param name="item">The item to enqueue.</param>
public void PushMessage(SendOrPostCallbackItem item)
{
_queue.Enqueue(item);
_semaphore.Release();
}
/// <summary>
/// Pushes the specified item onto this instance.
/// </summary>
/// <param name="item">The item to enqueue.</param>
public void PushMessage(SendOrPostCallbackItem item)
{
_queue.Enqueue(item);
}
