[Python-ideas] Protecting finally clauses of interruptions
Gregory P. Smith
greg at krypto.org
Tue Apr 3 01:10:22 CEST 2012
On Mon, Apr 2, 2012 at 3:28 PM, Yury Selivanov <yselivanov.ml at gmail.com>wrote:
> On 2012-04-02, at 6:24 PM, Paul Colomiets wrote:
> >> I still don't get how exactly do you propose to handle sudden thread
> >> interruption in your own example:
> >> l.lock()
> >> # (!) the thread may be interrupted at this point
> >> try:
> >> ...
> >> finally:
> >> l.unlock()
> >> You don't have a 'with' statement here.
> > By wrapping lock into a context manager.
> How's that going to work for tons of existing code?
A context manager doesn't solve this interruption "race condition" issue
If the __enter__ method is interrupted it won't have returned a context and
thus __exit__ will never be called.
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