4 files changed, 40 insertions, 4 deletions
diff --git a/platform/iphone/SCsub b/platform/iphone/SCsub
index 0113f75697..4a4e06cc0f 100644
--- a/platform/iphone/SCsub
+++ b/platform/iphone/SCsub
@@ -35,7 +35,7 @@ if env['ios_appirater'] == "yes":
 obj = env_ios.Object('godot_iphone.cpp')
 
 prog = None
-if env["target"]=="release":
+if env["target"]=="release" || env["target"] == "release_debug":
 	prog = env_ios.Program('#bin/godot_opt', [obj] + iphone_lib)
 	#action = "dsymutil "+File(prog)[0].path+" -o ../build/script_exec/build/Debug-iphoneos/script_exec.app.dSYM"
 	#env.AddPostAction(prog, action)
diff --git a/platform/iphone/audio_driver_iphone.cpp b/platform/iphone/audio_driver_iphone.cpp
index d39b8f3c4d..611f57dea3 100644
--- a/platform/iphone/audio_driver_iphone.cpp
+++ b/platform/iphone/audio_driver_iphone.cpp
@@ -99,7 +99,16 @@ OSStatus AudioDriverIphone::output_callback(void *inRefCon,
 	AudioBuffer *abuf;
 	AudioDriverIphone* ad = (AudioDriverIphone*)inRefCon;
 
-	if (!ad->active) {
+	bool mix = true;
+
+	if (!ad_active)
+		mix = false;
+	else {
+		mix = mutex->try_lock() == OK;
+	};
+
+
+	if (!mix) {
 		for (unsigned int i = 0; i < ioData->mNumberBuffers; i++) {
 			abuf = &ioData->mBuffers[i];
 			zeromem(abuf->mData, abuf->mDataByteSize);
@@ -147,11 +156,28 @@ AudioDriverSW::OutputFormat AudioDriverIphone::get_output_format() const {
 	return OUTPUT_STEREO;
 };
 
-void AudioDriverIphone::lock() {};
-void AudioDriverIphone::unlock() {};
+void AudioDriverIphone::lock() {
+
+	if (active && mutex)
+		mutex->lock();
+};
+
+void AudioDriverIphone::unlock() {
+	if (active && mutex)
+		mutex->unlock();
+};
 
 void AudioDriverIphone::finish() {
 
 	memdelete_arr(samples_in);
 };
 
+
+AudioDriverIphone::AudioDriverIphone() {
+
+	mutex=Mutex::create();//NULL;
+};
+
+AudioDriverIphone::~AudioDriverIphone() {
+
+};
diff --git a/platform/iphone/audio_driver_iphone.h b/platform/iphone/audio_driver_iphone.h
index eec54d9ee3..05fa741282 100644
--- a/platform/iphone/audio_driver_iphone.h
+++ b/platform/iphone/audio_driver_iphone.h
@@ -34,6 +34,7 @@ class AudioDriverIphone : public AudioDriverSW {
 
 	AudioComponentInstance audio_unit;
 	bool active;
+	Mutex *mutex;
 
 	int channels;
 	int32_t* samples_in;
@@ -59,5 +60,8 @@ public:
 	virtual void lock();
 	virtual void unlock();
 	virtual void finish();
+
+	AudioDriverIphone();
+	~AudioDriverIphone();
 };
 
diff --git a/platform/iphone/detect.py b/platform/iphone/detect.py
index ec6e4c98f1..33bde58041 100644
--- a/platform/iphone/detect.py
+++ b/platform/iphone/detect.py
@@ -104,6 +104,12 @@ def configure(env):
 		env['OBJSUFFIX'] = "_opt"+env['OBJSUFFIX']
 		env['LIBSUFFIX'] = "_opt"+env['LIBSUFFIX']
 
+	elif env["target"] == "release_debug":
+		env.Append(CCFLAGS=['-Os', '-ffast-math', '-DNS_BLOCK_ASSERTIONS=1','-Wall','-DDEBUG_ENABLED'])
+		env.Append(LINKFLAGS=['-Os', '-ffast-math'])
+		env['OBJSUFFIX'] = "_opt"+env['OBJSUFFIX']
+		env['LIBSUFFIX'] = "_opt"+env['LIBSUFFIX']
+
 	elif (env["target"]=="debug"):
 
 		env.Append(CCFLAGS=['-D_DEBUG', '-DDEBUG=1', '-gdwarf-2', '-Wall', '-O0', '-DDEBUG_ENABLED'])