/*

Copyright (C) 2016 Apple Inc. All Rights Reserved.

See LICENSE.txt for this sample’s licensing information

Abstract:

Part of Core Audio Public Utility Classes

*/

#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__