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diff --git a/libs/appleutility/CoreAudio/AudioUnits/AUPublic/AUCarbonViewBase/CarbonEventHandler.cpp b/libs/appleutility/CoreAudio/AudioUnits/AUPublic/AUCarbonViewBase/CarbonEventHandler.cpp
new file mode 100644
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+++ b/libs/appleutility/CoreAudio/AudioUnits/AUPublic/AUCarbonViewBase/CarbonEventHandler.cpp
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+/*
+     File: CarbonEventHandler.cpp
+ Abstract: CarbonEventHandler.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 "CarbonEventHandler.h"
+
+static pascal OSStatus TheEventHandler(EventHandlerCallRef inHandlerRef, EventRef inEvent, void *inUserData)
+{
+	CarbonEventHandler *handler = (CarbonEventHandler *)inUserData;
+	if (handler->HandleEvent(inHandlerRef, inEvent))
+		return noErr;
+	else return eventNotHandledErr;
+}
+
+CarbonEventHandler::CarbonEventHandler() :
+	mHandlers(NULL)
+{
+}
+
+CarbonEventHandler::~CarbonEventHandler()
+{
+	if (mHandlers != NULL) {
+		int count = static_cast<int>(CFDictionaryGetCount(mHandlers));
+		EventHandlerRef *theHandlers = (EventHandlerRef*) malloc(count * sizeof(EventHandlerRef));
+		CFDictionaryGetKeysAndValues(mHandlers, NULL, (const void **)theHandlers);
+		
+		for (int i = 0; i < count; i++)
+			RemoveEventHandler(theHandlers[i]);
+		CFDictionaryRemoveAllValues(mHandlers);
+		CFRelease (mHandlers);
+		free(theHandlers);
+	}	
+}
+
+void	CarbonEventHandler::WantEventTypes(EventTargetRef target, UInt32 inNumTypes, const EventTypeSpec *inList)
+{
+	if (mHandlers == NULL)
+		mHandlers = CFDictionaryCreateMutable(NULL, 0, NULL, NULL);
+		
+	EventHandlerRef handler;
+	
+	if (CFDictionaryGetValueIfPresent (mHandlers, target, (const void **)&handler))	// if there is already a handler for the target, add the type
+		verify_noerr(AddEventTypesToHandler(handler, inNumTypes, inList));
+	else {
+		verify_noerr(InstallEventHandler(target, TheEventHandler, inNumTypes, inList, this, &handler));
+		CFDictionaryAddValue(mHandlers, target, handler);
+	}
+}