Re: [boost] [lockfree] how many items are queued?

Subject: Re: [boost] [lockfree] how many items are queued?
From: Tim Blechmann (tim_at_[hidden])
Date: 2009-09-04 03:52:48

>>> lockfree.fifo provides the info if the queue is empty or not. 
>>
>> it is mainly done as debugging help, but it is not supposed to be used
>> in concurrent code ...
> 
> Because this function is available I thought it is safe to used it.

well, there is a warning in the docs, noting, that this function is not
thread-safe  :)

> What are the reasons that it is not supposed to be used?

it may give you wrong results, because the check cannot be implemented
in an atomic manner ...

cheers, tim

-- 
tim_at_[hidden]
http://tim.klingt.org
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