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pulseaudio: don't wait on pa_context_subscribe in hotplug thread.

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This risks blocking the thread if disaster ensues, and we can wait in the
thread's main loop for subscription as well anywhere else.

Reference Issue #7971.

(cherry picked from commit 956b18f50cc3794f253b025cca6e5e00c445fd67)
This commit is contained in:
Ryan C. Gordon 2023-07-12 16:00:13 -04:00
parent 29d461b628
commit 832b524180
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GPG key ID: FA148B892AB48044
1 changed files with 4 additions and 1 deletions
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5
src/audio/pulseaudio/SDL_pulseaudio.c
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@ -859,7 +859,10 @@ static int SDLCALL HotplugThread(void *data)
SDL_SetThreadPriority(SDL_THREAD_PRIORITY_LOW);
PULSEAUDIO_pa_threaded_mainloop_lock(pulseaudio_threaded_mainloop);
PULSEAUDIO_pa_context_set_subscribe_callback(pulseaudio_context, HotplugCallback, NULL);
WaitForPulseOperation(PULSEAUDIO_pa_context_subscribe(pulseaudio_context, PA_SUBSCRIPTION_MASK_SINK | PA_SUBSCRIPTION_MASK_SOURCE, NULL, NULL));
/* don't WaitForPulseOperation on the subscription; when it's done we'll be able to get hotplug events, but waiting doesn't changing anything. */
PULSEAUDIO_pa_operation_unref(PULSEAUDIO_pa_context_subscribe(pulseaudio_context, PA_SUBSCRIPTION_MASK_SINK | PA_SUBSCRIPTION_MASK_SOURCE, NULL, NULL));
while (SDL_AtomicGet(&pulseaudio_hotplug_thread_active)) {
PULSEAUDIO_pa_threaded_mainloop_wait(pulseaudio_threaded_mainloop);
}