platform/mac/SuperColliderAU/AUSDK/CAReferenceCounted.h

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  40 */
  41 /*=============================================================================
  42         CAReferenceCounted.h
  43
  44 =============================================================================*/
  45
  46 #ifndef __CAReferenceCounted_h__
  47 #define __CAReferenceCounted_h__
  48
  49 #if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
  50         #include <libkern/OSAtomic.h>
  51 #else
  52         #include <CoreServices.h>
  53 #endif
  54
  55 #if TARGET_OS_WIN32
  56         #include "CAWindows.h"
  57 #endif
  58
  59 // base class for reference-counted objects
  60 class CAReferenceCounted {
  61 public:
  62         CAReferenceCounted() : mRefCount(1) {}
  63
  64 #if TARGET_OS_WIN32
  65         void    retain() { IncrementAtomic(&mRefCount); }
  66 #else
  67         void    retain() { OSAtomicIncrement32Barrier(&mRefCount); }
  68 #endif
  69
  70         void    release()
  71                         {
  72 #if TARGET_OS_WIN32
  73                                 SInt32 rc = DecrementAtomic(&mRefCount);
  74                                 if (rc == 1) {
  75 #else
  76                                 SInt32 rc = OSAtomicDecrement32Barrier(&mRefCount);
  77                                 if (rc == 0) {
  78 #endif
  79                                         delete this;
  80                                 }
  81                         }
  82
  83 protected:
  84     virtual     ~CAReferenceCounted() { }
  85
  86 private:
  87 #if TARGET_OS_WIN32
  88         SInt32          mRefCount;
  89 #else
  90         int32_t         mRefCount;
  91 #endif
  92
  93         CAReferenceCounted(const CAReferenceCounted &a) : mRefCount(0) { }
  94         CAReferenceCounted operator=(const CAReferenceCounted &a) { return *this; }
  95 };
  96
  97
  98 #endif // __CAReferenceCounted_h__