[PD-dev] pd source - trying to understand m_mainloop() and sched_tick()

[Rich E]

Hi all,

I've been stepping through the pd source and trying to understand the
scheduling system, would anyone who knows mind helping me to this effect?

There are two options that m_mainloop() has for
scheduling, m_pollingscheduler() and m_callbackscheduler().  On OS X, I am
only getting a hit on m_pollingscheduler,
since sched_useaudio = SCHED_AUDIO_POLL.  Does sched_useaudio ever
equal SCHED_AUDIO_CALLBACK, which would then cause m_callbackscheduler() to
be used instead?

I'm wondering if sched_tick() is ever called from a non-main thread.

Cheers,
Rich
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