On Sat, Aug 2, 2008 at 2:36 PM, James <[EMAIL PROTECTED]> wrote: > All, > > I'm trying to write a class that will acquire a lock before entering a > critical section, and then release it. Does this look like the right > way to go about accomplishing my goal? > > try: > grabLock = self.lock.acquire( 0 ) > if grabLock: > print 'acquired lock successfully' > else: > print "did *not* obtain lock" > < ** what do I put here? ** > > finally: > if grabLock is True: > > <do something "critical" here> > self.lock.release() > print 'released lock' > > What should I be doing in the else: statement? If I can't grab the > lock, should I simply try again? Maybe a while loop that keeps trying > until I grab the lock? (I'm not really sure how I'm going to integrate > the 'try' statement with the while loop, though, to solve the problem > of not grabbing the lock)
What are you using for the lock. A threading.Lock will block if you try to acquire it and it is not available. Why do you need the try? You could put the acquire in a while loop. You probably want to sleep in the loop, so you don't chew up too much CPU. Kent _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
