[concurrency-interest] Is there a ConcurrentBlockingQueue ??

Gregg Wonderly gregg at cytetech.com
Tue Mar 20 18:52:52 EDT 2007

Hanson Char wrote:
> Hi Gregg,
>> It seems like parkq should always be emptied
> I think I see what you mean.  Yes there is a chance that some unparked
> items are left over in parkq, if an item is placed to q after a
> ThreadMarker is placed to parkq but before the thread (of the
> associated ThreadMarker) is parked.  In such case, the left-over
> ThreadMarker's would have "parked" set to false.
> The logic in the offer method attempts to minimize the left-over in
> parkq by removing all consecutive ThreadMarker with "parked" set to
> false.

duh...  I missed that looping logic associated with "parked".  I was thinking it 
returned no matter what.  It looks to me like that should take care of the left 
behind "unparked" marker entries.

Sorry for the hassle.

Gregg Wonderly

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