mutex with redis

gistfile1.txt

def acquire(name):
    tries = 0
    while True:
        tries += 1
        if tries >= 30:
            raise Exception("Couldn't acquire lock on mutex "+name)
        try:
            n = r.incr("lock-"+name)
            if n == 1:
                return True
            r.decr("lock-"+name)
            time.sleep(1)
            print "waiting for release on mutex "+name
            # TODO: potential infinite loop..
        except Exception as ex:
            print ex
            time.sleep(1)