Re: [boost] Boost Threads Condition may block forever on clockchange

From: Alexander Terekhov (terekhov_at_[hidden])
Date: 2007-12-06 12:08:54

Anthony Williams wrote:
> 
> Alexander Terekhov <terekhov <at> web.de> writes:
> > Anthony Williams wrote:
> > [...]
> > > Waitable timers. According to the docs, when you specify an absolute timeout
> > > for a timer it tracks clock changes.
> >
> > That isn't really helpful given that win32 waitable timers don't
> > synchronize with condvar waiters by locking associated mutexes.
> 
> The point is that a condvar waiter doing a timed wait can use the waitable timer
> as part of a WaitForMultipleObjects call waiting on the sync objects internal to
> the cond var, rather than using a timeout: if the waitable timer is triggered
> then the specified absolute time has been reached, and the call has timed out.
> 
> Of course, the condvar implementation then needs to handle relocking the mutexes.

I meant the race between clock change and "WaitForMultipleObjects 
call waiting".

regards,
alexander.