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// This is a part of the Active Template Library.
// Copyright (C) Microsoft Corporation
// All rights reserved.
#ifndef __ATLCOMCLI_H__
#define __ATLCOMCLI_H__
#pragma once
#include <assert.h>
#include <ole2.h>
#include <olectl.h>
#pragma warning (push)
#pragma warning (disable: 4127) // conditional expression constant
#pragma warning (disable: 4571) //catch(...) blocks compiled with /EHs do NOT catch or re-throw Structured Exceptions
template <class T>
class _NoAddRefReleaseOnCComPtr :
public T
{
private:
STDMETHOD_(ULONG, AddRef)() = 0;
STDMETHOD_(ULONG, Release)() = 0;
};
template <class T>
class CComPtrBase
{
protected:
CComPtrBase() throw()
{
p = NULL;
}
CComPtrBase(_Inout_opt_ T* lp) throw()
{
p = lp;
if (p != NULL)
p->AddRef();
}
public:
typedef T _PtrClass;
~CComPtrBase() throw()
{
if (p)
p->Release();
}
operator T*() const throw()
{
return p;
}
T& operator*() const
{
return *p;
}
T** operator&() throw()
{
return &p;
}
_NoAddRefReleaseOnCComPtr<T>* operator->() const throw()
{
return (_NoAddRefReleaseOnCComPtr<T>*)p;
}
bool operator!() const throw()
{
return (p == NULL);
}
bool operator<(_In_opt_ T* pT) const throw()
{
return p < pT;
}
bool operator!=(_In_opt_ T* pT) const
{
return !operator==(pT);
}
bool operator==(_In_opt_ T* pT) const throw()
{
return p == pT;
}
// Release the interface and set to NULL
void Release() throw()
{
T* pTemp = p;
if (pTemp)
{
p = NULL;
pTemp->Release();
}
}
// Compare two objects for equivalence
bool IsEqualObject(_Inout_opt_ IUnknown* pOther) throw()
{
if (p == NULL && pOther == NULL)
return true; // They are both NULL objects
if (p == NULL || pOther == NULL)
return false; // One is NULL the other is not
CComPtr<IUnknown> punk1;
CComPtr<IUnknown> punk2;
p->QueryInterface(__uuidof(IUnknown), (void**)&punk1);
pOther->QueryInterface(__uuidof(IUnknown), (void**)&punk2);
return punk1 == punk2;
}
// Attach to an existing interface (does not AddRef)
void Attach(_In_opt_ T* p2) throw()
{
if (p)
p->Release();
p = p2;
}
// Detach the interface (does not Release)
T* Detach() throw()
{
T* pt = p;
p = NULL;
return pt;
}
_Check_return_ HRESULT CopyTo(_Deref_out_opt_ T** ppT) throw()
{
ASSERT(ppT != NULL);
if (ppT == NULL)
return E_POINTER;
*ppT = p;
if (p)
p->AddRef();
return S_OK;
}
_Check_return_ HRESULT SetSite(_Inout_opt_ IUnknown* punkParent) throw()
{
return AtlSetChildSite(p, punkParent);
}
_Check_return_ HRESULT Advise(
_Inout_ IUnknown* pUnk,
_In_ const IID& iid,
_Out_ LPDWORD pdw) throw()
{
return AtlAdvise(p, pUnk, iid, pdw);
}
_Check_return_ HRESULT CoCreateInstance(
_In_ REFCLSID rclsid,
_Inout_opt_ LPUNKNOWN pUnkOuter = NULL,
_In_ DWORD dwClsContext = CLSCTX_ALL) throw()
{
return ::CoCreateInstance(rclsid, pUnkOuter, dwClsContext, __uuidof(T), (void**)&p);
}
_Check_return_ HRESULT CoCreateInstance(
_In_z_ LPCOLESTR szProgID,
_Inout_opt_ LPUNKNOWN pUnkOuter = NULL,
_In_ DWORD dwClsContext = CLSCTX_ALL) throw()
{
CLSID clsid;
HRESULT hr = CLSIDFromProgID(szProgID, &clsid);
if (SUCCEEDED(hr))
hr = ::CoCreateInstance(clsid, pUnkOuter, dwClsContext, __uuidof(T), (void**)&p);
return hr;
}
template <class Q>
_Check_return_ HRESULT QueryInterface(_Deref_out_ Q** pp) const throw()
{
return p->QueryInterface(__uuidof(Q), (void**)pp);
}
T* p;
};
template <class T>
class CComPtr :
public CComPtrBase<T>
{
public:
CComPtr() throw()
{
}
CComPtr(_Inout_opt_ T* lp) throw() :
CComPtrBase<T>(lp)
{
}
CComPtr(_Inout_ const CComPtr<T>& lp) throw() :
CComPtrBase<T>(lp.p)
{
}
T* operator=(_Inout_opt_ T* lp) throw()
{
if(*this!=lp)
{
return static_cast<T*>(AtlComPtrAssign((IUnknown**)&p, lp));
}
return *this;
}
template <typename Q>
T* operator=(_Inout_ const CComPtr<Q>& lp) throw()
{
if( !IsEqualObject(lp) )
{
return static_cast<T*>(AtlComQIPtrAssign((IUnknown**)&p, lp, __uuidof(T)));
}
return *this;
}
T* operator=(_Inout_ const CComPtr<T>& lp) throw()
{
if(*this!=lp)
{
return static_cast<T*>(AtlComPtrAssign((IUnknown**)&p, lp));
}
return *this;
}
CComPtr(_Inout_ CComPtr<T>&& lp) throw() :
CComPtrBase<T>()
{
p = lp.p;
lp.p = NULL;
}
T* operator=(_Inout_ CComPtr<T>&& lp) throw()
{
if (*this != lp)
{
if (p != NULL)
p->Release();
p = lp.p;
lp.p = NULL;
}
return *this;
}
};
template <class T, const IID* piid = &__uuidof(T)>
class CComQIPtr :
public CComPtr<T>
{
public:
CComQIPtr() throw()
{
}
CComQIPtr(_Inout_opt_ T* lp) throw() :
CComPtr<T>(lp)
{
}
CComQIPtr(_Inout_ const CComQIPtr<T,piid>& lp) throw() :
CComPtr<T>(lp.p)
{
}
CComQIPtr(_Inout_opt_ IUnknown* lp) throw()
{
if (lp != NULL)
lp->QueryInterface(*piid, (void **)&p);
}
T* operator=(_Inout_opt_ T* lp) throw()
{
if(*this!=lp)
{
return static_cast<T*>(AtlComPtrAssign((IUnknown**)&p, lp));
}
return *this;
}
T* operator=(_Inout_ const CComQIPtr<T,piid>& lp) throw()
{
if(*this!=lp)
{
return static_cast<T*>(AtlComPtrAssign((IUnknown**)&p, lp.p));
}
return *this;
}
T* operator=(_Inout_opt_ IUnknown* lp) throw()
{
if(*this!=lp)
{
return static_cast<T*>(AtlComQIPtrAssign((IUnknown**)&p, lp, *piid));
}
return *this;
}
};
#pragma warning (pop)
#endif // __ATLCOMCLI_H__
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