Groups > comp.programming.threads > #1165

Signal handlers writing into pipes

Path	csiph.com!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!news.musoftware.de!wum.musoftware.de!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From	Markus Elfring <Markus.Elfring@web.de>
Newsgroups	comp.programming.threads, comp.unix.programmer
Subject	Signal handlers writing into pipes
Date	Wed, 03 Oct 2012 16:36:29 +0200
Lines	13
Message-ID	<506C4D6D.2090809@web.de> (permalink)
References	<accvmcFog2gU1@mid.individual.net> <pan.2012.09.25.11.15.59.228000@nowhere.com> <acik2gF3panU1@mid.individual.net> <pan.2012.09.27.12.35.52.872000@nowhere.com> <aclh4pFol46U1@mid.individual.net> <pan.2012.09.28.17.26.06.856000@nowhere.com> <aco59lFcohrU1@mid.individual.net> <pan.2012.09.29.19.37.07.356000@nowhere.com> <rggkj9-4fn.ln1@wilbur.25thandClement.com> <87txuep1iz.fsf@sapphire.mobileactivedefense.com>
Mime-Version	1.0
Content-Type	text/plain; charset=ISO-8859-1
Content-Transfer-Encoding	7bit
X-Trace	individual.net BvOIfawstXk3nA0vCzxncQIvR4gUcfhRD4AnmnNaWasn5P0mBG
Cancel-Lock	sha1:vvHSjduty7vlGbx1iBSkQyyhnfY=
User-Agent	Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120825 Thunderbird/15.0
In-Reply-To	<87txuep1iz.fsf@sapphire.mobileactivedefense.com>
Xref	csiph.com comp.programming.threads:1165 comp.unix.programmer:3453

Cross-posted to 2 groups.

Show key headers only | View raw

> Technically, when the program is receiving signals so fast that it
> doesn't get around to processing them anymore, that's a livelock and
> in this case, something has to be dropped on the floor in order to
> restore the ability to make forward progress. Consequently, just
> setting the pipe descriptor to non-blocking and ignoring EAGAIN in the
> signal handler might be a sensible approach, especially considering
> that this is unlikely to happen for typical uses of signals.

Can the probability for a live-lock be reduced if a named pipe would be used
instead of an anonymous one?

Regards,
Markus

Back to comp.programming.threads | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Safe accesses of global arrays in signal handlers? Markus Elfring <Markus.Elfring@web.de> - 2012-09-25 08:01 +0200
  Re: Safe accesses of global arrays in signal handlers? Nobody <nobody@nowhere.com> - 2012-09-25 12:15 +0100
    Re: Safe accesses of global arrays in signal handlers? Markus Elfring <Markus.Elfring@web.de> - 2012-09-27 11:20 +0200
      Re: Safe accesses of global arrays in signal handlers? Rainer Weikusat <rweikusat@mssgmbh.com> - 2012-09-27 13:23 +0100
        Re: Safe accesses of global arrays in signal handlers? Markus Elfring <Markus.Elfring@web.de> - 2012-09-28 13:25 +0200
      Re: Safe accesses of global arrays in signal handlers? Nobody <nobody@nowhere.com> - 2012-09-27 13:35 +0100
        Re: Safe accesses of global arrays in signal handlers? Markus Elfring <Markus.Elfring@web.de> - 2012-09-28 13:48 +0200
          Re: Safe accesses of global arrays in signal handlers? Johann Klammer <klammerj@NOSPAM.a1.net> - 2012-09-28 18:34 +0200
            Re: Safe accesses of global arrays in signal handlers? scott@slp53.sl.home (Scott Lurndal) - 2012-09-28 17:54 +0000
          Re: Safe accesses of global arrays in signal handlers? Nobody <nobody@nowhere.com> - 2012-09-28 18:26 +0100
            Re: Safe accesses of global arrays in signal handlers? Markus Elfring <Markus.Elfring@web.de> - 2012-09-29 13:44 +0200
              Re: Safe accesses of global arrays in signal handlers? Nobody <nobody@nowhere.com> - 2012-09-29 20:37 +0100
                Re: Safe accesses of global arrays in signal handlers? William Ahern <william@wilbur.25thandClement.com> - 2012-09-29 17:31 -0700
                Signal handlers writing into pipes Markus Elfring <Markus.Elfring@web.de> - 2012-09-30 13:21 +0200
                Re: Safe accesses of global arrays in signal handlers? Rainer Weikusat <rweikusat@mssgmbh.com> - 2012-10-01 18:04 +0100
                Signal handlers writing into pipes Markus Elfring <Markus.Elfring@web.de> - 2012-10-03 16:36 +0200
                Re: Signal handlers writing into pipes Rainer Weikusat <rweikusat@mssgmbh.com> - 2012-10-03 17:07 +0100
                Re: Safe accesses of global arrays in signal handlers? Markus Elfring <Markus.Elfring@web.de> - 2012-09-30 13:12 +0200
                Re: Safe accesses of global arrays in signal handlers? Nobody <nobody@nowhere.com> - 2012-09-30 20:46 +0100
        Re: Safe accesses of global arrays in signal handlers? Geoff Clare <geoff@clare.See-My-Signature.invalid> - 2012-09-28 13:39 +0100
        Re: Safe accesses of global arrays in signal handlers? Markus Elfring <Markus.Elfring@web.de> - 2012-09-29 13:15 +0200
          Re: Safe accesses of global arrays in signal handlers? William Ahern <william@wilbur.25thandClement.com> - 2012-09-29 17:42 -0700
            Re: Safe accesses of global arrays in signal handlers? Markus Elfring <Markus.Elfring@web.de> - 2012-09-30 14:04 +0200
  Re: Safe accesses of global arrays in signal handlers? Rainer Weikusat <rweikusat@mssgmbh.com> - 2012-09-25 13:27 +0100

csiph-web