Re: Signal issues.

[muppet <scott asofyet org>]

On Dec 31, 2004, at 6:59 AM, Jan Hudec wrote:

> On Thu, Dec 30, 2004 at 20:09:57 -0500, muppet wrote:
> > Here's something from one of my apps that needs to have special SIGINT
> > handling at certain times.
...
> Ouch, that's ugly :-(.

indeed.


> I just solved it with POSIX::sigaction, which does not try to be 
> clever.
> But I meant something like this:
...
> That is, just add a special source, that will be checked in every 
> iteration, it will look at the signal flag in perl interpreter and if 
> it's set, it will just make a dummy call to the interpreter to let it 
> handle the signal. Minimal overhead and no need to hack about with 
> %SIG and things like that. This option was not mentioned in the 
> message cited above.

my only reluctance here is that PERL_ASYNC_CHECK() (the macro perl 
calls after every op to check for deferred signals) and PL_sig_pending 
(the global var/macro that PERL_ASYNC_CHECK uses) are not part of the 
official perl API and could change out from under us.  ... of course, 
we're already using a few of those undocumented tricks in other places, 
so it's probably not the end of the world.

i'll play with this over the weekend and see what i can come up with.

--
muppet <scott at asofyet dot org>