Merged revisions 294278 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.8

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  r294278 | jpeeler | 2010-11-08 15:59:45 -0600 (Mon, 08 Nov 2010) | 23 lines
  
  Merged revisions 294277 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.6.2
  
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    r294277 | jpeeler | 2010-11-08 15:58:13 -0600 (Mon, 08 Nov 2010) | 16 lines
    
    Fix playback failure when using IAX with the timerfd module.
    
    To fix this issue the alert pipe will now be used when the timerfd module is
    in use. There appeared to be a race that was not solved by adding locking in the
    timerfd module, but needed to be there anyway. The race was between the timer
    being put in non-continuous mode in ast_read on the channel thread and the IAX 
    frame scheduler queuing a frame which would enable continuous mode before the
    non-continuous mode event was read. This race for now is simply avoided.
    
    (closes issue #18110)
    Reported by: tpanton
    Tested by: tpanton
    
    I put tested by tpanton because it was tested on his hardware. Thanks for the
    remote access to debug this issue!
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@294279 65c4cc65-6c06-0410-ace0-fbb531ad65f3