356 lines
8.2 KiB
C
356 lines
8.2 KiB
C
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/*++
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Copyright (C) 1996-2001 Microsoft Corporation
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Module Name:
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UNK.H
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Abstract:
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IUnknown Helpers
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History:
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--*/
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#ifndef __WBEM_UNKNOWN__H_
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#define __WBEM_UNKNOWN__H_
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#include <objbase.h>
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#include "corepol.h"
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#pragma warning(disable : 4355)
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class POLARITY CLifeControl
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{
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public:
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virtual BOOL ObjectCreated(IUnknown* pv) = 0;
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virtual void ObjectDestroyed(IUnknown* pv) = 0;
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virtual void AddRef(IUnknown* pv) = 0;
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virtual void Release(IUnknown* pv) = 0;
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};
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class POLARITY CContainerControl : public CLifeControl
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{
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protected:
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IUnknown* m_pUnk;
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public:
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CContainerControl(IUnknown* pUnk) : m_pUnk(pUnk){}
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virtual BOOL ObjectCreated(IUnknown* pv){ return TRUE;};
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virtual void ObjectDestroyed(IUnknown* pv){};
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virtual void AddRef(IUnknown* pv){m_pUnk->AddRef();}
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virtual void Release(IUnknown* pv){m_pUnk->Release();}
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};
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class POLARITY CUnk : public IUnknown
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{
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public:// THIS IS DUE TO A VC++ BUG!!! protected:
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long m_lRef;
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CLifeControl* m_pControl;
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IUnknown* m_pOuter;
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IUnknown* GetUnknown() {return m_pOuter?m_pOuter:(IUnknown*)this;}
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virtual void* GetInterface(REFIID riid) = 0;
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virtual BOOL OnInitialize(){return TRUE;}
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public:
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CUnk(CLifeControl* pControl = NULL, IUnknown* pOuter = NULL);
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virtual ~CUnk();
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virtual BOOL Initialize();
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// non-delegating interface
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STDMETHOD(QueryInterface)(REFIID riid, void** ppv);
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STDMETHOD_(ULONG, AddRef)();
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STDMETHOD_(ULONG, Release)();
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IUnknown* GetInnerUnknown() {return this;}
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void SetControl(CLifeControl* pControl);
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};
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class POLARITY CUnkInternal : public IUnknown
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{
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protected:
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long m_lRef;
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CLifeControl* m_pControl;
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public:
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CUnkInternal( CLifeControl* pControl ) : m_pControl(pControl), m_lRef(0) {}
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virtual ~CUnkInternal() {}
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virtual void* GetInterface(REFIID riid) = 0;
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IUnknown* GetUnknown() { return (IUnknown*)this; }
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STDMETHOD(QueryInterface)(REFIID riid, void** ppv)
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{
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HRESULT hr = InternalQueryInterface( riid, ppv );
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if ( SUCCEEDED(hr) )
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AddRef();
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return hr;
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}
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STDMETHOD_(ULONG, AddRef)()
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{
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if ( m_pControl )
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m_pControl->ObjectCreated((IUnknown*)this);
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return InternalAddRef();
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}
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STDMETHOD_(ULONG, Release)()
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{
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CLifeControl* pControl = m_pControl;
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ULONG ulRef = InternalRelease();
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if ( pControl )
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pControl->ObjectDestroyed((IUnknown*)this);
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return ulRef;
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}
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HRESULT InternalQueryInterface( REFIID riid, void** ppv )
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{
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HRESULT hr;
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if( riid == IID_IUnknown )
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*ppv = (IUnknown*)this;
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else
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*ppv = GetInterface(riid);
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if ( *ppv != NULL )
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hr = S_OK;
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else
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hr = E_NOINTERFACE;
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return hr;
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}
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ULONG InternalAddRef()
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{
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return InterlockedIncrement(&m_lRef);
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}
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ULONG InternalRelease()
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{
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long lRef = InterlockedDecrement(&m_lRef);
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if(lRef == 0)
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delete this;
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return lRef;
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}
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};
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template <class TInterface, class TObject>
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class CImpl : public TInterface
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{
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protected:
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TObject* m_pObject;
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public:
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CImpl(TObject* pObject) : m_pObject(pObject){}
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~CImpl(){}
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// delegating interface
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STDMETHOD(QueryInterface)(REFIID riid, void** ppv)
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{
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return m_pObject->GetUnknown()->QueryInterface(riid, ppv);
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}
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STDMETHOD_(ULONG, AddRef)()
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{
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return m_pObject->GetUnknown()->AddRef();
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}
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STDMETHOD_(ULONG, Release)()
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{
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return m_pObject->GetUnknown()->Release();
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}
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};
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template <class TInterface, const IID* t_piid>
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class CUnkBase : public TInterface
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{
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protected:
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long m_lRef;
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CLifeControl* m_pControl;
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public:
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typedef CUnkBase<TInterface, t_piid> TUnkBase;
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CUnkBase(CLifeControl* pControl = NULL)
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: m_pControl(pControl), m_lRef(0)
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{
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if ( m_pControl != NULL ) m_pControl->ObjectCreated(this);
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}
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virtual ~CUnkBase()
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{
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if ( m_pControl != NULL ) m_pControl->ObjectDestroyed(this);
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}
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ULONG STDMETHODCALLTYPE AddRef()
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{
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return InterlockedIncrement(&m_lRef);
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}
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ULONG STDMETHODCALLTYPE Release()
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{
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long lRef = InterlockedDecrement(&m_lRef);
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if(lRef == 0)
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delete this;
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return lRef;
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}
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HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void** ppv)
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{
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if(riid == IID_IUnknown || riid == *t_piid)
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{
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AddRef();
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*ppv = this;
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return S_OK;
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}
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else return E_NOINTERFACE;
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}
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};
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template <class TInterface, const IID* t_piid, class TInterface2,
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const IID* t_piid2>
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class CUnkBase2 : public TInterface, public TInterface2
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{
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protected:
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long m_lRef;
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CLifeControl* m_pControl;
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public:
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typedef CUnkBase2<TInterface, t_piid, TInterface2, t_piid2> TUnkBase;
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CUnkBase2(CLifeControl* pControl = NULL) : m_pControl(pControl), m_lRef(0)
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{
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if (m_pControl != NULL)
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m_pControl->ObjectCreated((TInterface*)this);
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}
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virtual ~CUnkBase2()
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{
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if (m_pControl != NULL)
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m_pControl->ObjectDestroyed((TInterface*)this);
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}
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ULONG STDMETHODCALLTYPE AddRef()
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{
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return InterlockedIncrement(&m_lRef);
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}
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ULONG STDMETHODCALLTYPE Release()
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{
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long lRef = InterlockedDecrement(&m_lRef);
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if(lRef == 0)
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delete this;
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return lRef;
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}
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HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void** ppv)
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{
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if(riid == IID_IUnknown || riid == *t_piid)
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{
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AddRef();
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*ppv = (TInterface*)this;
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return S_OK;
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}
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else if(riid == *t_piid2)
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{
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AddRef();
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*ppv = (TInterface2*)this;
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return S_OK;
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}
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else return E_NOINTERFACE;
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}
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};
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template<class TInterface1, class TInterface2>
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class CChild2 : public virtual TInterface1, public virtual TInterface2
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{
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};
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template<class TInterfaces>
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class CUnkTemplate : public TInterfaces
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{
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protected:
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IUnknown* m_pOuter;
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class CInnerUnk : public IUnknown
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{
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private:
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CUnkTemplate<TInterfaces>* m_pObject;
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long m_lRef;
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CLifeControl* m_pControl;
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public:
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CInnerUnk(CUnkTemplate<TInterfaces>* pObject, CLifeControl* pControl)
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{
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if(m_pControl) m_pControl->ObjectCreated(this);
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m_lRef++;
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GetUnknown()->AddRef();
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m_pObject->Initialize();
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GetUnknown()->Release();
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m_lRef--;
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}
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~CInnerUnk()
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{
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if(m_pControl) m_pControl->ObjectDestroyed(this);
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}
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// non-delegating interface
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STDMETHOD(QueryInterface)(REFIID riid, void** ppv)
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{
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if(riid == IID_IUnknown)
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*ppv = (IUnknown*)&m_Inner;
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else
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*ppv = m_pObject->GetInterface(riid);
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if(*ppv)
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{
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AddRef();
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return S_OK;
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}
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else return E_NOINTERFACE;
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}
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STDMETHOD_(ULONG, AddRef)()
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{
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if(m_pControl) m_pControl->AddRef((IUnknown*)this);
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return InterlockedIncrement(&m_lRef);
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}
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STDMETHOD_(ULONG, Release)()
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{
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if(m_pControl) m_pControl->Release((IUnknown*)this);
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long lRef = InterlockedDecrement(&m_lRef);
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if(lRef == 0)
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{
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m_lRef++;
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delete m_pObject;
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}
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return lRef;
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}
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} m_Inner;
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IUnknown* GetUnknown()
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{return m_pOuter?m_pOuter:(IUnknown*)&m_Inner;}
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virtual void Initialize(){}
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public:
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CUnkTemplate(CLifeControl* pControl = NULL, IUnknown* pOuter = NULL)
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: m_Inner(this, pControl), m_pOuter(pOuter){}
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virtual ~CUnkTemplate(){}
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// delegating interface
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STDMETHOD(QueryInterface)(REFIID riid, void** ppv)
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{
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return GetUnknown()->QueryInterface(riid, ppv);
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}
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STDMETHOD_(ULONG, AddRef)()
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{
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return GetUnknown()->AddRef();
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}
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STDMETHOD_(ULONG, Release)()
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{
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return GetUnknown()->Release();
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}
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IUnknown* GetInnerUnknown() {return &m_Inner;}
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};
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#endif
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