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Diffstat (limited to 'libs/appleutility/CoreAudio/PublicUtility/CATokenMap.h')
| -rw-r--r-- | libs/appleutility/CoreAudio/PublicUtility/CATokenMap.h | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/libs/appleutility/CoreAudio/PublicUtility/CATokenMap.h b/libs/appleutility/CoreAudio/PublicUtility/CATokenMap.h new file mode 100644 index 0000000000..f85f393022 --- /dev/null +++ b/libs/appleutility/CoreAudio/PublicUtility/CATokenMap.h @@ -0,0 +1,212 @@ +/* + File: CATokenMap.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. + +*/ +#if !defined(__CATokenMap_h__) +#define __CATokenMap_h__ + +//============================================================================= +// Includes +//============================================================================= + +// System Includes +#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__) + #include <CoreAudio/CoreAudioTypes.h> +#else + #include <CoreAudioTypes.h> +#endif + +// PublicUtility Includes +#include "CAMutex.h" + +// Standard Library Includes +#include <map> +#include <iterator> + +//============================================================================= +// CATokenMap +//============================================================================= + +template <class T> +class CATokenMap +{ + +// Types +private: + typedef std::map<UInt32, T*> TokenMap; + +// Construction/Destruction +public: + CATokenMap() : mTokenMap(), mNextToken(256), mTokenMapMutex("CATokenMap Mutex") {} + ~CATokenMap() {} + +// Operations +public: + bool Lock() + { + return mTokenMapMutex.Lock(); + } + + void Unlock() + { + mTokenMapMutex.Unlock(); + } + + UInt32 GetToken(T* inObject) const + { + CAMutex::Locker theLocker(const_cast<CAMutex&>(mTokenMapMutex)); + UInt32 theAnswer = 0; + typename TokenMap::const_iterator i = mTokenMap.begin(); + while((theAnswer == 0) && (i != mTokenMap.end())) + { + if(i->second == inObject) + { + theAnswer = i->first; + } + std::advance(i, 1); + } + return theAnswer; + } + + T* GetObject(UInt32 inToken) const + { + CAMutex::Locker theLocker(const_cast<CAMutex&>(mTokenMapMutex)); + typename TokenMap::const_iterator i = mTokenMap.find(inToken); + return i != mTokenMap.end() ? i->second : NULL; + } + + T* GetObject(const void* inToken) const + { + #if __LP64__ + return GetObject((UInt32)((UInt64)inToken)); + #else + return GetObject((UInt32)inToken); + #endif + } + + UInt32 GetNumberObjects() const + { + CAMutex::Locker theLocker(const_cast<CAMutex&>(mTokenMapMutex)); + return static_cast<UInt32>(mTokenMap.size()); + } + + T* GetObjectByIndex(UInt32 inIndex) const + { + T* theAnswer = NULL; + CAMutex::Locker theLocker(const_cast<CAMutex&>(mTokenMapMutex)); + if(inIndex < mTokenMap.size()) + { + typename TokenMap::const_iterator i = mTokenMap.begin(); + std::advance(i, inIndex); + theAnswer = (i != mTokenMap.end()) ? i->second : NULL; + } + return theAnswer; + } + + void AddMapping(UInt32 inToken, T* inObject) + { + CAMutex::Locker theLocker(mTokenMapMutex); + typename TokenMap::iterator i = mTokenMap.find(inToken); + if(i != mTokenMap.end()) + { + i->second = inObject; + } + else + { + mTokenMap.insert(typename TokenMap::value_type(inToken, inObject)); + } + } + + void RemoveMapping(UInt32 inToken, T* /*inObject*/) + { + CAMutex::Locker theLocker(mTokenMapMutex); + typename TokenMap::iterator i = mTokenMap.find(inToken); + if(i != mTokenMap.end()) + { + mTokenMap.erase(i); + } + } + + UInt32 GetNextToken() + { + return mNextToken++; + } + + UInt32 MapObject(T* inObject) + { + CAMutex::Locker theLocker(mTokenMapMutex); + UInt32 theToken = GetNextToken(); + mTokenMap.insert(typename TokenMap::value_type(theToken, inObject)); + return theToken; + } + + void UnmapObject(T* inObject) + { + CAMutex::Locker theLocker(mTokenMapMutex); + bool isDone = false; + typename TokenMap::iterator i = mTokenMap.begin(); + while(!isDone && (i != mTokenMap.end())) + { + if(i->second == inObject) + { + mTokenMap.erase(i); + isDone = true; + } + else + { + std::advance(i, 1); + } + } + } + +// Implementation +private: + TokenMap mTokenMap; + UInt32 mNextToken; + CAMutex mTokenMapMutex; + +}; + +#endif |