Is there a way to protect a piece of critical code?

[Hendrik van Rooyen]

 "Paul Rubin" <http://phr.cx@NOSPAM.invalid> wrote:


> Paul Rubin <http://phr.cx@NOSPAM.invalid> writes:
> >     def get_from_queue(queue):
> >        try:
> >           return queue.get(block=False)
> >        except Queue.Empty:
> >           return QUEUE_IS_EMPTY
> 
> Alternatively:
> 
>      def get_from_queue(queue):
>         try:
>            return (queue.get(block=False), True)
>         except Queue.Empty:
>            return (None, False)
> 
> This is maybe a nicer interface (no special sentinel value needed).
> You'd use
> 
>      value, nonempty = get_from_queue(queue)
>       
> if nonempty is true then the item is valid.
> 
Hey, this is even nicer - thanks!

- Hendrik