public async Task <bool> WaitForMessageAsync(CancellationToken token)
{
bool lockAcquired = false;
try
{
await sourceLock.WaitAsync(token);
lockAcquired = true;
return(await source.WaitForMessageAsync(token));
}
catch (OperationCanceledException)
{
// TODO: Fix the timeout value reported
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new TimeoutException(
SR.Format(SR.WaitForMessageTimedOut, TimeSpan.Zero),
TimeoutHelper.CreateEnterTimedOutException(TimeSpan.Zero)));
}
finally
{
if (lockAcquired)
{
sourceLock.Release();
}
}
}
public async Task <bool> WaitForMessageAsync(TimeSpan timeout)
{
TimeoutHelper timeoutHelper = new TimeoutHelper(timeout);
// If timeout == TimeSpan.MaxValue, then we want to pass Timeout.Infinite as
// SemaphoreSlim doesn't accept timeouts > Int32.MaxValue.
// Using TimeoutHelper.RemainingTime() would yield a value less than TimeSpan.MaxValue
// and would result in the value Int32.MaxValue so we must use the original timeout specified.
if (!await _sourceLock.WaitAsync(TimeoutHelper.ToMilliseconds(timeout)))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new TimeoutException(SR.Format(SR.WaitForMessageTimedOut, timeout),
TimeoutHelper.CreateEnterTimedOutException(timeout)));
}
try
{
return(await _source.WaitForMessageAsync(timeoutHelper.RemainingTime()));
}
finally
{
_sourceLock.Release();
}
}