Re: [Boost-users] Trying to get Boost.Interprocess going on OS X 10.5.1

From: Ion Gaztañaga (igaztanaga_at_[hidden])
Date: 2007-11-25 09:41:28

Stefan Arentz escribió:
> The problem is that when I kill or Control-C the consumer that the
> producer stops. I assume that this is because some lock is held by the
> consumer and the producer is waiting for it.
> 
> Is there a way to release these locks when the consumer is killed? Or
> a way to detect this, so that I can release them manually or so?

Ufff... Signals are quite difficult to handle. You will have the same 
problems with other process-wide resources, like files. I can't think 
about any reliable solution right now. We would need to add cancellation 
to process-shared mutexes and that does not seem easy. The only think I 
can think is handling the signal (but avoiding ending the process) and 
setting a global variable that is checked by other threads. You could 
only use timed functions send/receive functions that check that global 
variable. If the variable is set, an exit from process cleanly (exit 
from non-main threads). If you only use the main thread, throw an 
exception when the global variable is set. Not very clean, but I think 
it's the only way.

Regards,

Ion