/// <summary>
/// Queues given <see cref="AsyncInvocation" /> for execution by <see cref="AsyncJobScheduler" />.
/// </summary>
/// <param name="asyncInvocation"><see cref="AsyncInvocation" /> to invoke.</param>
/// <remarks>
/// For performance reasons, the internal execution method utilizes ConfigureAwait(false).
/// </remarks>
public static void QueueAsyncInvocation(AsyncInvocation asyncInvocation)
{
if (AbortToken.IsCancellationRequested)
{
return;
}
else if (asyncInvocation == null)
{
throw new NullReferenceException(nameof(asyncInvocation));
}
Task.Run(() => ExecuteInvocation(asyncInvocation));
}
void IInterceptor.Intercept(IInvocation invocation)
{
var returnType = invocation.Method.ReturnType;
var builder = AsyncMethodBuilder.TryCreate(returnType);
if (builder != null)
{
var asyncInvocation = new AsyncInvocation(invocation);
var stateMachine = new AsyncStateMachine(asyncInvocation, builder, task: this.InterceptAsync(asyncInvocation));
builder.Start(stateMachine);
invocation.ReturnValue = builder.Task();
}
else
{
this.Intercept(invocation);
}
}
private static async Task ExecuteInvocation(AsyncInvocation invocation)
{
Debug.Assert(invocation != null);
if (AbortToken.IsCancellationRequested)
{
return;
}
try
{
await _WorkerSemaphore.WaitAsync().ConfigureAwait(false);
await invocation.Invoke().ConfigureAwait(false);
}
finally
{
// release semaphore regardless of any invocation errors
_WorkerSemaphore.Release();
}
}
