• Max Kellermann's avatar
    PlayerControl: add second Cond object · a9b62a2e
    Max Kellermann authored
    This fixes a deadlock bug introduced by 18076ac9.  After all, the
    second Cond was necessary.
    
    The problem: two threads can wait for a signal at the same time.  The
    player thread waits for the output thread to finish playback.  The
    main thread waits for the player thread to complete a command.  The
    output thread finishes playback, and sends a signal, which
    unfortunately does not wake up the player thread, but the main
    thread.  The main thread sees that the command is still not finished,
    and waits again.  The signal is lost forever, and MPD is deadlocked.
    a9b62a2e
PlayerControl.hxx 6.6 KB