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Diffstat (limited to 'libs/appleutility/CoreAudio/PublicUtility/CAReferenceCounted.h')
-rw-r--r-- | libs/appleutility/CoreAudio/PublicUtility/CAReferenceCounted.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/libs/appleutility/CoreAudio/PublicUtility/CAReferenceCounted.h b/libs/appleutility/CoreAudio/PublicUtility/CAReferenceCounted.h new file mode 100644 index 0000000000..f00fc61675 --- /dev/null +++ b/libs/appleutility/CoreAudio/PublicUtility/CAReferenceCounted.h @@ -0,0 +1,97 @@ +/* + File: CAReferenceCounted.h + Abstract: Part of CoreAudio Utility Classes + 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. + +*/ +#ifndef __CAReferenceCounted_h__ +#define __CAReferenceCounted_h__ + +#include "CAAtomic.h" + +// base class for reference-counted objects +class CAReferenceCounted { +public: + CAReferenceCounted() : mRefCount(1) {} + + void retain() { CAAtomicIncrement32(&mRefCount); } + + void release() + { + SInt32 rc = CAAtomicDecrement32(&mRefCount); + if (rc == 0) { + releaseObject(); + } + } + + + class Retainer { + public: + Retainer(CAReferenceCounted *obj) : mObject(obj) { mObject->retain(); } + ~Retainer() { mObject->release(); } + + private: + CAReferenceCounted * mObject; + }; + +protected: + virtual ~CAReferenceCounted() { } + + virtual void releaseObject () + { + delete this; + } + +#if DEBUG +public: +#endif + SInt32 GetReferenceCount() const { return mRefCount; } +private: + SInt32 mRefCount; + + CAReferenceCounted(const CAReferenceCounted &a); + CAReferenceCounted &operator=(const CAReferenceCounted &a); +}; + + +#endif // __CAReferenceCounted_h__ |