Re: Desperately missing a working "pselect()" or similar...

From: lkv@isg.de
Date: Mon Oct 08 2001 - 12:06:31 EST

Alan Cox wrote:
>
> > Hmmm... would you say the "siglongjmp" method is better than the "self-pipe"
> > method for a select on both file descriptors and signals too?
>
> siglongjmp doesnt have to make any syscalls so intuitively I'd say it
> ought to be more efficient

Are you sure? Doesn't sigsetjmp() call sigprocmask in order to obtain
the current signal mask?

In the glibc I read:

int
__sigjmp_save (sigjmp_buf env, int savemask)
{
  env[0].__mask_was_saved = (savemask &&
                             __sigprocmask (SIG_BLOCK, (sigset_t *) NULL,
                                            &env[0].__saved_mask) == 0);

  return 0;
}

*sigh* things could be so easy if there was a working pselect()...

Regards,

Lutz vieweg 

--
 Dipl. Phys. Lutz Vieweg | email: lkv@isg.de
 Innovative Software AG  | Phone/Fax: +49-69-505030 -120/-505
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 60325 Frankfurt am Main | ^^^ PGP key available here ^^^
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