[Bug 761586] systemclock: regression causing audiomixer to stall

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=761586

Thiago Sousa Santos <thiagossantos at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|git master                  |1.7.2

--- Comment #9 from Thiago Sousa Santos <thiagossantos at gmail.com> ---
Thanks for spotting the missing piece of the patch and, specially, for the
tests!

commit 2b0ff13d070f370286078c5531b2e13006e5ce98
Author: Stian Selnes <stian at pexip.com>
Date:   Wed Feb 10 09:09:29 2016 +0100

    systemclock: Fix wait/unschedule race

    Fixes a race where an entry is set to BUSY in
    gst_system_clock_id_wait_jitter() and is UNSCHEDULED before
    gst_system_clock_id_wait_jitter_unlocked() starts processing it. The
    wakeup added by gst_system_clock_id_unschedule() must be cleaned up.

    Two stress tests are added. One test that triggers the specific issue
    described above. The second stresses the code path where a wait is
    rescheduled because the poll returned early.

    https://bugzilla.gnome.org/show_bug.cgi?id=761586

commit 77a98d98cbed15e0bfdd8fe982b7ac83b1826d13
Author: Thiago Santos <thiagoss at osg.samsung.com>
Date:   Fri Feb 5 15:34:47 2016 -0300

    systemclock: handle unschedule of late entries

    If the clockentry is too late and is unscheduled before it gets
    a change to detect its lateness the wakeup count and the poll are
    used but never properly cleaned up. This leaves it in a dirty state
    that is going to mess with the next clock entry waiting requests.

    https://bugzilla.gnome.org/show_bug.cgi?id=761586

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