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diff --git a/libs/appleutility/CoreAudio/PublicUtility/CABundleLocker.cpp b/libs/appleutility/CoreAudio/PublicUtility/CABundleLocker.cpp
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+/*
+     File: CABundleLocker.cpp
+ Abstract: CABundleLocker.h
+  Version: 1.1
+ 
+ Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple
+ Inc. ("Apple") in consideration of your agreement to the following
+ terms, and your use, installation, modification or redistribution of
+ this Apple software constitutes acceptance of these terms.  If you do
+ not agree with these terms, please do not use, install, modify or
+ redistribute this Apple software.
+ 
+ In consideration of your agreement to abide by the following terms, and
+ subject to these terms, Apple grants you a personal, non-exclusive
+ license, under Apple's copyrights in this original Apple software (the
+ "Apple Software"), to use, reproduce, modify and redistribute the Apple
+ Software, with or without modifications, in source and/or binary forms;
+ provided that if you redistribute the Apple Software in its entirety and
+ without modifications, you must retain this notice and the following
+ text and disclaimers in all such redistributions of the Apple Software.
+ Neither the name, trademarks, service marks or logos of Apple Inc. may
+ be used to endorse or promote products derived from the Apple Software
+ without specific prior written permission from Apple.  Except as
+ expressly stated in this notice, no other rights or licenses, express or
+ implied, are granted by Apple herein, including but not limited to any
+ patent rights that may be infringed by your derivative works or by other
+ works in which the Apple Software may be incorporated.
+ 
+ The Apple Software is provided by Apple on an "AS IS" basis.  APPLE
+ MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
+ THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
+ FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
+ OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
+ 
+ IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
+ OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
+ MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
+ AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
+ STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
+ POSSIBILITY OF SUCH DAMAGE.
+ 
+ Copyright (C) 2014 Apple Inc. All Rights Reserved.
+ 
+*/
+#include "CABundleLocker.h"
+#include <pthread.h>
+
+/*
+some bundle operations are not thread safe, notably CFCopyLocalizedStringFromTableInBundle
+*/
+
+static pthread_mutex_t sCABundleLocker = PTHREAD_MUTEX_INITIALIZER;
+
+#define RECURSIVE_LOCK 0
+
+#if RECURSIVE_LOCK
+static pthread_once_t sOnce = PTHREAD_ONCE_INIT;
+
+static void InitCABundleLocker()
+{
+	// have to do this because OS X lacks PTHREAD_MUTEX_RECURSIVE_INITIALIZER_NP
+	pthread_mutexattr_t attr;
+	pthread_mutexattr_init(&attr);
+	pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+	pthread_mutex_init(&sCABundleLocker, &attr);
+	pthread_mutexattr_destroy(&attr);
+}
+#endif
+
+CABundleLocker::CABundleLocker()
+{
+#if RECURSIVE_LOCK
+	pthread_once(&sOnce, InitCABundleLocker);
+#endif
+	pthread_mutex_lock(&sCABundleLocker);
+}
+
+CABundleLocker::~CABundleLocker()
+{
+	pthread_mutex_unlock(&sCABundleLocker);
+}
+