Will python ever have signalhandlers in threads?

Antoon Pardon apardon at forel.vub.ac.be
Tue Nov 23 08:48:52 CET 2004

Op 2004-11-22, Michael Hudson schreef <mwh at python.net>:
> I'm not really reading comp.lang.python at the moment, but found this
> thread via the Python-URL...
> Tim Peters <tim.peters at gmail.com> writes:
>> The only currently active contributor I can think of who cares about
>> signals enough to actually work on them is Michael Hudson, but his
>> interest seems limited to keeping the interactions been Python's GNU
>> readline wrapper and signals working across incompatible details of
>> signal semantics on Unixish boxes.  It's possible I'm wrong, and he'd
>> really love to work much more on signals, but feels inhibited by
>> Guido's well-known dislike of the beasts.
> I think you're more or less right.  A couple of years ago I got pretty
> badly discouraged attempting to support sigprocmask and friends from
> Python, and came to conclusion that noone who cares about portability
> -- not just no Python programmers, but *noone at all* -- mixes threads
> and signals, because the cross platform behaviour is a total mess, and
> in many cases is just plain buggy (I believe the FreeBSD version of
> libc_r for 5.something contains a fix that is a direct consequence of
> my efforts, for example).  Even linking with the threading libraries
> was enough to stuff things up mightily in some circumstances.
> We Do Not Want To Go There.

Well for the moment I don't care about portability that much. I do
understand this is a big issue for something in the standard library
and with your remarks consider my question in the subject answered
with no.

I do think it is a pity that the crossplatform behaviour is such a
total mess but for the moment that can't be helped.

I'll just experiment a bit my self on the boxes I'm interested in.

Antoon Pardon

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