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Re: Setting signal handlers considered unsafe?

by perreal (Monk)
on Nov 05, 2008 at 21:37 UTC ( [id://721823]=note: print w/replies, xml ) Need Help??


in reply to Setting signal handlers considered unsafe?

On my machine: 
perl, v5.10.0
Linux localhost.localdomain 2.6.26.5-45.fc9.i686 #1 SMP i686 i386

[download]
I got the following flavour of results: 
localhost$ perl d.pl
  child starting
  SIGARLM: main handler
  SIGARLM: main handler
  SIGARLM: main handler
  Maximal count of pending signals (120) exceeded at d.pl line 14.
localhost$ perl d.pl 
  child starting
  Alarm clock
localhost$ perl d.pl 
  child starting
  Maximal count of pending signals (120) exceeded at d.pl line 9.
  SIGARLM: main handler
localhost$ perl d.pl 
  child starting
  Alarm clock

[download]
What exactly are you trying to do?

Replies are listed 'Best First'.
Re^2: Setting signal handlers considered unsafe?
by gnosek (Sexton) on Nov 05, 2008 at 22:42 UTC
    What exactly are you trying to do?

    I want to ensure that at every moment of my program's life signals are safely handled. I have already experienced strange errors which boil down to non-atomicity of setting signal handlers (a signal gets delivered in the middle of setting a handler, thoroughly confusing perl).

[reply]

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