Re: [boost] [thread] condition suffering from lost wakup bug?

From: Alexander Terekhov (terekhov_at_[hidden])
Date: 2005-09-15 11:13:35

Roland Schwarz wrote:
[...]
> 3) a new waiter arrives while the gate still is closed
>     he will block on the gate and not increment nWaitersBlocked yet
> 
> 4) a signal arrives, while gate still is closed
>     Now is 0 < nWaitersToUnblock < N, correct?
>     But 0 == nWaitersBlocked
>     the signal results in a NO-OP and consequently the
>     waiter from 3) will never get it to see - hence it is lost ??
> 
> I am studying the pthread_cond_wait.c pseudo code taken from
> SNAPSHOT 2004-05-16.
> 
> What do I miss here? 

http://www.opengroup.org/onlinepubs/007908799/xsh/pthread_cond_wait.html

regards,
alexander.