Merged revisions 332321 via svnmerge from

Merged revisions 332321 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/10

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  r332321 | twilson | 2011-08-17 13:09:49 -0500 (Wed, 17 Aug 2011) | 17 lines

  Merged revisions 332320 via svnmerge from
  https://origsvn.digium.com/svn/asterisk/branches/1.8

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    r332320 | twilson | 2011-08-17 12:35:27 -0500 (Wed, 17 Aug 2011) | 10 lines

    Don't read from a disarmed or invalid timerfd

    Numerous isues have been reported for deadlocks that are caused by
    a blocking read in res_timing_timerfd on a file descriptor that will
    never be written to. This patch adds some checks to make sure that
    the timerfd is both valid and armed before calling read().

    Should fix: ASTERISK-18142, ASTERISK-18166, ASTERISK-18197, AST-486,
    AST-495, AST-507 and possibly others.

    Review: https://reviewboard.asterisk.org/r/1361/
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@332337 65c4cc65-6c06-0410-ace0-fbb531ad65f3