CCObject類

class CC_DLL CCCopying
{
public:
    virtual CCObject* copyWithZone(CCZone* pZone);
};

class CC_DLL CCObject : public CCCopying
{
public:
    // object id, CCScriptSupport need public m_uID
    unsigned int        m_uID;
    // Lua reference id
    int                 m_nLuaID;
protected:
    // count of references
    unsigned int        m_uReference;
    // count of autorelease
    unsigned int        m_uAutoReleaseCount;
public:
    CCObject(void);
    virtual ~CCObject(void);
    
    void release(void);
    void retain(void);
    CCObject* autorelease(void);
    CCObject* copy(void);
    bool isSingleReference(void) const;
    unsigned int retainCount(void) const;
    virtual bool isEqual(const CCObject* pObject);

    virtual void acceptVisitor(CCDataVisitor &visitor);

    virtual void update(float dt) {CC_UNUSED_PARAM(dt);};
    
    friend class CCAutoreleasePool;
};

typedef void (CCObject::*SEL_SCHEDULE)(float);
typedef void (CCObject::*SEL_CallFunc)();
typedef void (CCObject::*SEL_CallFuncN)(CCNode*);
typedef void (CCObject::*SEL_CallFuncND)(CCNode*, void*);
typedef void (CCObject::*SEL_CallFuncO)(CCObject*);
typedef void (CCObject::*SEL_MenuHandler)(CCObject*);
typedef void (CCObject::*SEL_EventHandler)(CCEvent*);
typedef int (CCObject::*SEL_Compare)(CCObject*);

#define schedule_selector(_SELECTOR) (SEL_SCHEDULE)(&_SELECTOR)
#define callfunc_selector(_SELECTOR) (SEL_CallFunc)(&_SELECTOR)
#define callfuncN_selector(_SELECTOR) (SEL_CallFuncN)(&_SELECTOR)
#define callfuncND_selector(_SELECTOR) (SEL_CallFuncND)(&_SELECTOR)
#define callfuncO_selector(_SELECTOR) (SEL_CallFuncO)(&_SELECTOR)
#define menu_selector(_SELECTOR) (SEL_MenuHandler)(&_SELECTOR)
#define event_selector(_SELECTOR) (SEL_EventHandler)(&_SELECTOR)
#define compare_selector(_SELECTOR) (SEL_Compare)(&_SELECTOR)

CCObject* CCCopying::copyWithZone(CCZone *pZone)
{
    CC_UNUSED_PARAM(pZone);
    CCAssert(0, "not implement");
    return 0;
}

CCObject::CCObject(void)
: m_nLuaID(0)
, m_uReference(1) // when the object is created, the reference count of it is 1
, m_uAutoReleaseCount(0)
{
    static unsigned int uObjectCount = 0;
    // 用來統計對象id
    m_uID = ++uObjectCount;
}

CCObject::~CCObject(void)
{
    // 如果這個對象被管理，我們要從管理池中將他移除
    if (m_uAutoReleaseCount > 0)
    {
        CCPoolManager::sharedPoolManager()->removeObject(this);
    }

    // 若該對象被lua引擎使用則移除之
    if (m_nLuaID)
    {
        CCScriptEngineManager::sharedManager()->getScriptEngine()->removeScriptObjectByCCObject(this);
    }
    else
    {
        CCScriptEngineProtocol* pEngine = CCScriptEngineManager::sharedManager()->getScriptEngine();
        if (pEngine != NULL && pEngine->getScriptType() == kScriptTypeJavascript)
        {
            pEngine->removeScriptObjectByCCObject(this);
        }
    }
}

CCObject* CCObject::copy()
{
	// 實現這個對象拷貝
    return copyWithZone(0);
}

void CCObject::release(void)
{
	// 減少引用計數，在引用計數爲0時刪除該對象
    CCAssert(m_uReference > 0, "reference count should greater than 0");
    --m_uReference;
    if (m_uReference == 0)
    {
        delete this;
    }
}

void CCObject::retain(void)
{
    CCAssert(m_uReference > 0, "reference count should greater than 0");
    // 增加引用計數
    ++m_uReference;
}

CCObject* CCObject::autorelease(void)
{
	// 將該對象加入管理池中，最後自動釋放
    CCPoolManager::sharedPoolManager()->addObject(this);
    return this;
}

bool CCObject::isSingleReference(void) const
{
	// 引用計數是否單例
    return m_uReference == 1;
}

unsigned int CCObject::retainCount(void) const
{
	// 返回引用計數
    return m_uReference;
}

bool CCObject::isEqual(const CCObject *pObject)
{
    return this == pObject;
}

void CCObject::acceptVisitor(CCDataVisitor &visitor)
{
    visitor.visitObject(this);
}