Re: [Jack-Devel] jack threads

On Mon, May 2, 2011 at 5:22 AM, Tim Blechmann <[hidden]> wrote:
>>>>> i just saw, that jack2 launches 3 different threads inside my client.
>>>>> especially, if i register a JackThreadInitCallback, this callback is called
>>>>> three times, not only once, as it is documented. is this a bug or are the
>>>>> docs not up to date?
>>>>>
>>>>> thanks, tim
>>>>>
>>>>
>>>> Should be 2 threads and 2 JackThreadInitCallback, what is the third one?
>>>
>>> the message buffer thread. at least, its that way in jack1.
>>
>>
>> Ah yes, so 3 threads and 3 JackThreadInitCallback, right.
>
> if so, is there a way to determine if the thread init callback is called from
> the real-time jack thread? i want my thread init function called only from the
> main thread.

this isn't an option and it isn't the current purpose of the callback.
it was created to handle systems where any thread might need to be
"registered" or have some setup done with it before it can run its
normal work function. there's no model of identifying the thread in
any way. i think this would be a mistake too, because it would mean
that if thread semantics changed in the future, your code would likely
break (imagine a future in which libjack initiates N "realtime"
threads and not just 1, for example).

--p

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