Re: [PATCH] POSIX message queues - syscalls & SIGEV_THREAD

[Krzysztof Benedyczak]

On Tue, 18 Nov 2003, Jamie Lokier wrote:

[CUT]
> You are setting the first futex's word in userspace prior to the first
> futex wakeup, right?  Either 5 will detect that and return
> immediately, or it will reach 6 and the poll() returns immediately.
> No hole there.
>
> ( The async token passing flaw is that the _waker_ loses track of how
> many succesful wakeups it has sent; this is used by some
> implementations of fair semaphores, among other things.  That might be
> relevant to POSIX message queues but I do not see that it's relevant
> to the two futex problem you described. )
>

Thanks for information. I was wrongly assmuming that poll will block.
After checking the code - I know I have made a mistake.

Regards
Krzysiek
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