OSXRunLoopSingleton.cpp (1442B)
1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/ 2 /* This Source Code Form is subject to the terms of the Mozilla Public 3 * License, v. 2.0. If a copy of the MPL was not distributed with this file, 4 * You can obtain one at http://mozilla.org/MPL/2.0/. */ 5 6 #include "OSXRunLoopSingleton.h" 7 8 #include <AudioUnit/AudioUnit.h> 9 #include <CoreAudio/AudioHardware.h> 10 #include <CoreAudio/HostTime.h> 11 #include <CoreFoundation/CoreFoundation.h> 12 #include <mozilla/StaticMutex.h> 13 14 static bool gRunLoopSet = false; 15 static mozilla::StaticMutex gMutex MOZ_UNANNOTATED; 16 17 void mozilla_set_coreaudio_notification_runloop_if_needed() { 18 mozilla::StaticMutexAutoLock lock(gMutex); 19 if (gRunLoopSet) { 20 return; 21 } 22 23 /* This is needed so that AudioUnit listeners get called on this thread, and 24 * not the main thread. If we don't do that, they are not called, or a crash 25 * occur, depending on the OSX version. */ 26 AudioObjectPropertyAddress runloop_address = { 27 kAudioHardwarePropertyRunLoop, kAudioObjectPropertyScopeGlobal, 28 kAudioObjectPropertyElementMaster}; 29 30 CFRunLoopRef run_loop = nullptr; 31 32 OSStatus r; 33 r = AudioObjectSetPropertyData(kAudioObjectSystemObject, &runloop_address, 0, 34 NULL, sizeof(CFRunLoopRef), &run_loop); 35 if (r != noErr) { 36 NS_WARNING( 37 "Could not make global CoreAudio notifications use their own thread."); 38 } 39 40 gRunLoopSet = true; 41 }