Re: Waiting for threads

[Raffael Herzog]

Hi Richard,

On 2003-07-22 17:04:32 +0200 Richard Frith-Macdonald 
<richard@brainstorm.co.uk> wrote:

> You can register as an observer of NSThreadWillExitNotification to see when 
> threads exit (never tried it).
>
> If you need to block until the thread ends, you could have the thread obtain 
> a lock on startup, and release it in the notification observer, then have 
> your main thread block trying to obtain the lock until the exiting thread 
> releases it.

Thanks, that trick with the lock works fine... however, I was rather 
surprised, that it's possible to release a lock in a thread other than the one 
that acquired it.

For some reason, I don't receive these NSThreadWillExitNotifications, but I'll 
investigate that further before I claim having found a bug. :)

But still, some signal class would be a nice thing:

Thread 1:

NSSignal *mySignal = [[NSSignal alloc] init];
[mySignal setDropsSignals: (YES|NO)]; // whether to drop signals or not
// detach new trhead
// do something
[mySignal wait]; // or [signal waitAtMost: aTimeInterval]

Thread 2:

[mySignal send]; // or [signal sendObject: anObject]


cu & thanks,
  Raffi

--
 The difference between theory and practice is that in theory, there is
                no difference, but in practice, there is.

Raffael Herzog - herzog@raffael.ch - http://www.raffael.ch - ICQ #67961355