[whatwg] Workers and queue of events

Alexey Proskuryakov ap at webkit.org
Wed Nov 19 02:27:08 PST 2008

Nov 19, 2008, в 12:55 PM, Robert O'Callahan написал(а):

> And if it becomes a problem we might in a future version be able to  
> add something like a 'messagepostfailed' event that is fired on the  
> sending port in case a message failed to reach its target for one  
> reason or another.
> I don't think that would be useful. What if the message reaches the  
> target but the target dies while the message is queued? Or it dies  
> after executing the first JS statement in the message handler?

It turns out that message confirmations are necessary for garbage  
collection anyway - one can't GC a worker object if its thread/process  
has pending messages, or running scripts, because they can talk back  
and post events to worker.onmessage. So, we send a confirmation after  
the message has been dispatched, not just queued in the receiver. This  
is functionally equivalent to what Gecko does, I believe.

Note however that I'm talking about worker objects here, not ports.

- WBR, Alexey Proskuryakov

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