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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at */
#include "OSXRunLoopSingleton.h"
#include <mozilla/StaticMutex.h>
#include <AudioUnit/AudioUnit.h>
#include <CoreAudio/AudioHardware.h>
#include <CoreAudio/HostTime.h>
#include <CoreFoundation/CoreFoundation.h>
static bool gRunLoopSet = false;
static mozilla::StaticMutex gMutex MOZ_UNANNOTATED;
void mozilla_set_coreaudio_notification_runloop_if_needed() {
mozilla::StaticMutexAutoLock lock(gMutex);
if (gRunLoopSet) {
/* This is needed so that AudioUnit listeners get called on this thread, and
* not the main thread. If we don't do that, they are not called, or a crash
* occur, depending on the OSX version. */
AudioObjectPropertyAddress runloop_address = {
kAudioHardwarePropertyRunLoop, kAudioObjectPropertyScopeGlobal,
CFRunLoopRef run_loop = nullptr;
OSStatus r;
r = AudioObjectSetPropertyData(kAudioObjectSystemObject, &runloop_address, 0,
NULL, sizeof(CFRunLoopRef), &run_loop);
if (r != noErr) {
"Could not make global CoreAudio notifications use their own thread.");
gRunLoopSet = true;