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#ifndef WCREFMANAGER_H
#define WCREFMANAGER_H
#define SAFE_RELEASE(p) if (p) {p->Release(); p = NULL;}
//In order to use this interface, derive the Interface class
//from WCRefManager_Interface and derive the implementation class
//from WCRefManager_Impl. Further, in the implementation class
//declaration, place the macro WCREFMANAGER_IMPL.
class WCRefManager_Interface
{
public:
/// Constructor.
WCRefManager_Interface() {};
/// Destructor.
virtual ~WCRefManager_Interface() {};
/// Adds a reference to class.
virtual void AddRef() = 0;
/// Decrements reference count and deletes the object if reference count becomes zero.
virtual void Release() = 0;
};
///! See details at WCRefManager_Interface for how to use this.
class WCRefManager_Impl
{
public:
WCRefManager_Impl () : m_RefCount(1) {}
virtual ~WCRefManager_Impl() {}
protected:
/// Variable to store reference count.
unsigned int m_RefCount;
/// Helper to put implementation in an interface derived class, don't forget to
/// derive the impl from WCRefManager_Impl
#define WCREFMAN_IMPL \
public: \
virtual void AddRef() {m_RefCount++;} \
virtual void Release() {m_RefCount--; if (m_RefCount<=0) delete this;}
};
class WCRefManager
{
public:
/// Construcotr.
WCRefManager();
/// Destructor.
virtual ~WCRefManager();
/// Adds a reference to class.
void AddRef();
/// Decrements reference count and deletes the object if reference count becomes zero.
void Release();
private:
/// Variable to store reference count.
unsigned int m_RefCount;
};
#endif // WCREFMANAGER_H
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