* snd_mixer handle in two threads
@ 2010-06-09 13:05 Sebastian H.
2010-06-09 16:59 ` Sebastian H.
0 siblings, 1 reply; 2+ messages in thread
From: Sebastian H. @ 2010-06-09 13:05 UTC (permalink / raw)
To: alsa-devel
Hello again
This is still about the alsamixer-qt4 application I working on.
This time I wonder if a snd_mixer_t handle created with
snd_mixer_open ( ... ) can be used in two threads concurrently.
One thread should be the main Qt4 GUI thread and the second thread
should only poll ( ... ) blocking for ALSA events on the shared
snd_mixer_t handle in accompany with
snd_mixer_poll_descriptors_count ( ... )
snd_mixer_poll_descriptors ( ... )
snd_mixer_poll_descriptors_revents ( ... )
The second thread then will post Qt4 signals to the main thread
on occassion.
Does this sound feasible?
This approach seems neccessary as I want to avoid timed polls and any
integration of linux poll() in the Qt4 mail loop seems to boil down to
timed polls.
Regards,
Sebastian H.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: snd_mixer handle in two threads
2010-06-09 13:05 snd_mixer handle in two threads Sebastian H.
@ 2010-06-09 16:59 ` Sebastian H.
0 siblings, 0 replies; 2+ messages in thread
From: Sebastian H. @ 2010-06-09 16:59 UTC (permalink / raw)
To: alsa-devel
Am 09.06.2010 15:05, schrieb Sebastian H.:
> Hello again
>
> This is still about the alsamixer-qt4 application I working on.
>
> This time I wonder if a snd_mixer_t handle created with
> snd_mixer_open ( ... ) can be used in two threads concurrently.
>
> One thread should be the main Qt4 GUI thread and the second thread
> should only poll ( ... ) blocking for ALSA events on the shared
> snd_mixer_t handle in accompany with
>
> snd_mixer_poll_descriptors_count ( ... )
> snd_mixer_poll_descriptors ( ... )
> snd_mixer_poll_descriptors_revents ( ... )
>
> The second thread then will post Qt4 signals to the main thread
> on occassion.
Nevermind, QSocketNotifier solved the issue in a better way.
Sebastian
^ permalink raw reply [flat|nested] 2+ messages in thread
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