3 Abstract: Part of CoreAudio Utility Classes
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50 //==================================================================================================
52 //==================================================================================================
55 #if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
56 #include <CoreAudio/CoreAudioTypes.h>
58 #include <CoreAudioTypes.h>
66 #error Unsupported operating system
69 //==================================================================================================
71 //==================================================================================================
75 // Construction/Destruction
77 CAMutex(const char* inName);
83 virtual void Unlock();
84 virtual bool Try(bool& outWasLocked); // returns true if lock is free, false if not
86 virtual bool IsFree() const;
87 virtual bool IsOwnedByCurrentThread() const;
94 pthread_mutex_t mMutex;
100 // Helper class to manage taking and releasing recursively
105 // Construction/Destruction
107 Locker(CAMutex& inMutex) : mMutex(&inMutex), mNeedsRelease(false) { mNeedsRelease = mMutex->Lock(); }
108 Locker(CAMutex* inMutex) : mMutex(inMutex), mNeedsRelease(false) { mNeedsRelease = (mMutex != NULL && mMutex->Lock()); }
109 // in this case the mutex can be null
110 ~Locker() { if(mNeedsRelease) { mMutex->Unlock(); } }
114 Locker(const Locker&);
115 Locker& operator=(const Locker&);
128 Unlocker(CAMutex& inMutex);
135 // Hidden definitions of copy ctor, assignment operator
136 Unlocker(const Unlocker& copy); // Not implemented
137 Unlocker& operator=(const Unlocker& copy); // Not implemented
140 // you can use this with Try - if you take the lock in try, pass in the outWasLocked var
143 // Construction/Destruction
145 Tryer (CAMutex &mutex) : mMutex(mutex), mNeedsRelease(false), mHasLock(false) { mHasLock = mMutex.Try (mNeedsRelease); }
146 ~Tryer () { if (mNeedsRelease) mMutex.Unlock(); }
148 bool HasLock () const { return mHasLock; }
152 Tryer& operator=(const Tryer&);
163 #endif // __CAMutex_h__