A problem with poll

Jose-Marcio.Martins_at_ensmp.fr
Date: 05/20/04

  • Next message: Dan Nelson: "Re: Problem with a 5.2.1 system and downloading" 
    Date: Thu, 20 May 2004 21:52:53 +0200
To: freebsd-hackers@freebsd.org

    Hello,

    I'm using a pipe to communicate between threads in the same process.

    In fact, I've a thread waiting (using poll) for data available on some
    set of file descriptors.

     From time to time I need to interrupt the poll call in order to add a
    new file descriptor. I do this with the pipe.

    I add p[0] to the poll set and I write to p[1] when I want to interrupt
    the poll call.

    The problem is that poll returns as expected, but the read on the file
    descriptor blocks.

    Before the poll call, I set events flags to POLLIN | POLLPRI. When poll
    returns, events is set to POLLIN [ POLLPRI, and revents is 0. Value
    returned by poll is the good number of file descriptors ready.

    What I'm doing wrong ?

    Thanks for your help

    Joe 

    -- 
  ---------------------------------------------------------------
  Jose Marcio MARTINS DA CRUZ           Tel. :(33) 01.40.51.93.41
  Ecole des Mines de Paris              http://j-chkmail.ensmp.fr
  60, bd Saint Michel                http://www.ensmp.fr/~martins
  75272 - PARIS CEDEX 06      mailto:Jose-Marcio.Martins@ensmp.fr
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  • Next message: Dan Nelson: "Re: Problem with a 5.2.1 system and downloading"

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