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src/gdd/smartGDDPointer.h

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+
+//
+// Smart Pointer Class for GDD
+// ( automatically takes care of referencing / unreferening a gdd each time that it is used )
+//
+// Author: Jeff Hill
+//
+
+#ifndef smartGDDPointer_h
+#define smartGDDPointer_h
+
+//
+// smartGDDPointer
+//
+// smart pointer class which auto ref/unrefs the GDD
+//
+class smartGDDPointer {
+public:
+
+	smartGDDPointer () :
+		pValue (0) {}
+
+	smartGDDPointer (gdd &valueIn) :
+		pValue (&valueIn)
+	{
+		int gddStatus;
+		gddStatus = this->pValue->reference();
+		assert(!gddStatus);
+	}
+
+	smartGDDPointer (gdd *pValueIn) :
+		pValue (pValueIn)
+	{
+		if (this->pValue!=NULL) {
+			int gddStatus;
+			gddStatus = this->pValue->reference();
+			assert(!gddStatus);
+		}
+	}
+
+	smartGDDPointer (const smartGDDPointer &ptrIn) :
+		pValue (ptrIn.pValue)
+	{
+		if (this->pValue!=NULL) {
+			int gddStatus;
+			gddStatus = this->pValue->reference();
+			assert(!gddStatus);
+		}
+	}
+
+	~smartGDDPointer ()
+	{
+		if (this->pValue!=NULL) {
+			int gddStatus;
+			gddStatus = this->pValue->unreference();
+			assert (!gddStatus);
+		}
+	}
+
+	void set (gdd *pNewValue) 
+	{
+		int gddStatus;
+		//
+		// dont change the ref count (and
+		// potentially unref a gdd that we are 
+		// still using if the pointer isnt changing
+		//
+		if (this->pValue==pNewValue) {
+			return;
+		}
+		if (this->pValue!=NULL) {
+			gddStatus = this->pValue->unreference();
+			assert (!gddStatus);
+		}
+		this->pValue = pNewValue;
+		if (this->pValue!=NULL) {
+			gddStatus = this->pValue->reference();
+			assert (!gddStatus);
+		}
+	}
+
+	smartGDDPointer operator = (gdd *rhs) 
+	{
+		set (rhs);
+		return *this;
+	}
+
+	smartGDDPointer operator = (smartGDDPointer &rhs) 
+	{
+		set (rhs.pValue);
+		return *this;
+	}
+#if 0
+	int operator == (const smartGDDPointer &rhs) const
+	{
+		return this->pValue==rhs.pValue;
+	}
+
+	int operator != (const smartGDDPointer &rhs) const
+	{
+		return this->pValue!=rhs.pValue;
+	}
+#endif
+	gdd *operator -> () const
+	{
+		return this->pValue;
+	}
+
+	gdd & operator * () const
+	{
+		return *this->pValue;
+	}
+
+	operator gdd * () const
+	{
+		return this->pValue;
+	}
+
+private:
+	gdd *pValue;
+};
+
+#endif // smartGDDPointer_h