[vlc-devel] [PATCH 1/3] coreaudio: fix possible deadlock on pause

Thomas Guillem thomas at gllm.fr
Sat Dec 9 15:28:43 CET 2017

On Fri, Dec 8, 2017, at 19:21, Rémi Denis-Courmont wrote:
> Le perjantaina 8. joulukuuta 2017, 18.33.25 EET Thomas Guillem a écrit :
> > On Fri, Dec 8, 2017, at 18:26, Rémi Denis-Courmont wrote:
> > > No. Even then, that obviously can't work correctly.
> > 
> > Why ? I double checked, it works for me.
> Logically, that´s impossible with the current API.

I'm sorry but I really don't understand this conversation.

1/ You say that the 1/2 patch is useless since Pause can't be called
while the audio output is in Play or Flush

2/ Caro says that the commit log of the 1/2 patch is misleading and that
the second patch adds a call to ca_Pause() from a random thread

3/ You say it obviously can't work

4/ I ask why

5/ You repeat your first remark

Here, ca_Pause is the pause callback for macOS and iOS audio outputs.
With the patch 2/2, this function can be called from a random thread
when the audio session is disabled (and when the audio render callback
is shut down) and will unstuck flush/play.

> -- 
> 雷米‧德尼-库尔蒙
> https://www.remlab.net/
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