From 78818ca275769d37e514141a0cf3271c185b0d43 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Felippe=20Dur=C3=A1n?= <felippe.duran@gmail.com>
Date: Tue, 18 Jul 2017 00:12:20 -0300
Subject: [PATCH] Fix AudioEngine thread concurrency crash between
 myAlSourceNotificationCallback and _play2d iterating over _audioPlayers.
 (#18083)

---
 cocos/audio/apple/AudioEngine-inl.mm | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/cocos/audio/apple/AudioEngine-inl.mm b/cocos/audio/apple/AudioEngine-inl.mm
index 06c9992d2e..7532654f90 100644
--- a/cocos/audio/apple/AudioEngine-inl.mm
+++ b/cocos/audio/apple/AudioEngine-inl.mm
@@ -215,6 +215,7 @@ ALvoid AudioEngineImpl::myAlSourceNotificationCallback(ALuint sid, ALuint notifi
         return;
 
     AudioPlayer* player = nullptr;
+    s_instance->_threadMutex.lock();
     for (const auto& e : s_instance->_audioPlayers)
     {
         player = e.second;
@@ -223,6 +224,7 @@ ALvoid AudioEngineImpl::myAlSourceNotificationCallback(ALuint sid, ALuint notifi
             player->wakeupRotateThread();
         }
     }
+    s_instance->_threadMutex.unlock();
 }
 
 AudioEngineImpl::AudioEngineImpl()