public bool TryGetExisting(out ReusableResource <TResource> reusableResource)
{
var taskCompletionSource = new TaskCompletionSource <ReusableResource <TResource> >();
var request = new ExistingResourceRequestMessage(taskCompletionSource);
if (!_messageHandler.Post(request))
{
taskCompletionSource.SetException(GetObjectDisposedException());
}
// We can wait synchronously for the Task Result because ExistingResourceRequestMessage
// will always be handled immediately by the ActionBlock.
reusableResource = taskCompletionSource.Task.Result;
return(reusableResource != null);
}
private ReusableResource <TResource> TryGetReusableResource()
{
ReusableResource <TResource> reusableResource = null;
while (_availableResources.Count > 0)
{
var timestampedResource = _availableResources.Dequeue();
var resource = timestampedResource.Resource;
if (IsResourceExpired(timestampedResource))
{
DisposeResource(resource);
}
else
{
reusableResource = GetReusableResource(resource);
}
}
_messageHandler.Post(new EnsureAvailableResourcesMessage());
return(reusableResource);
}
