104 lines
3.2 KiB
C++
104 lines
3.2 KiB
C++
// Copyright (C) 1996-1997 Microsoft Corporation. All rights reserved.
|
|
|
|
#include "header.h"
|
|
#include "Unknown.H"
|
|
#include <stddef.h>
|
|
|
|
//=--------------------------------------------------------------------------=
|
|
// CUnknownObject::CPrivateUnknownObject::m_pMainUnknown
|
|
//=--------------------------------------------------------------------------=
|
|
// this method is used when we're sitting in the private unknown object,
|
|
// and we need to get at the pointer for the main unknown. basically, it's
|
|
// a little better to do this pointer arithmetic than have to store a pointer
|
|
// to the parent, etc.
|
|
|
|
inline CUnknownObject *CUnknownObject::CPrivateUnknownObject::m_pMainUnknown
|
|
(
|
|
void
|
|
)
|
|
{
|
|
return (CUnknownObject *)((LPBYTE)this - offsetof(CUnknownObject, m_UnkPrivate));
|
|
}
|
|
|
|
//=--------------------------------------------------------------------------=
|
|
// CUnknownObject::CPrivateUnknownObject::QueryInterface
|
|
//=--------------------------------------------------------------------------=
|
|
// this is the non-delegating internal QI routine.
|
|
//
|
|
// Parameters:
|
|
// REFIID - [in] interface they want
|
|
// void ** - [out] where they want to put the resulting object ptr.
|
|
//
|
|
// Output:
|
|
// HRESULT - S_OK, E_NOINTERFACE
|
|
|
|
STDMETHODIMP CUnknownObject::CPrivateUnknownObject::QueryInterface(REFIID riid, void **ppvObjOut)
|
|
{
|
|
CHECK_POINTER(ppvObjOut);
|
|
|
|
// if they're asking for IUnknown, then we have to pass them ourselves.
|
|
// otherwise defer to the inheriting object's InternalQueryInterface
|
|
//
|
|
if (DO_GUIDS_MATCH(riid, IID_IUnknown)) {
|
|
m_cRef++;
|
|
*ppvObjOut = (IUnknown *)this;
|
|
return S_OK;
|
|
} else
|
|
return m_pMainUnknown()->InternalQueryInterface(riid, ppvObjOut);
|
|
|
|
// dead code
|
|
}
|
|
|
|
//=--------------------------------------------------------------------------=
|
|
// CUnknownObject::CPrivateUnknownObject::AddRef
|
|
//=--------------------------------------------------------------------------=
|
|
// adds a tick to the current reference count.
|
|
//
|
|
// Output:
|
|
// ULONG - the new reference count
|
|
|
|
ULONG CUnknownObject::CPrivateUnknownObject::AddRef(void)
|
|
{
|
|
return ++m_cRef;
|
|
}
|
|
|
|
//=--------------------------------------------------------------------------=
|
|
// CUnknownObject::CPrivateUnknownObject::Release
|
|
//=--------------------------------------------------------------------------=
|
|
// removes a tick from the count, and delets the object if necessary
|
|
//
|
|
// Output:
|
|
// ULONG - remaining refs
|
|
|
|
ULONG CUnknownObject::CPrivateUnknownObject::Release (void)
|
|
{
|
|
ULONG cRef = --m_cRef;
|
|
|
|
if (!m_cRef)
|
|
delete m_pMainUnknown();
|
|
|
|
return cRef;
|
|
}
|
|
|
|
|
|
//=--------------------------------------------------------------------------=
|
|
// CUnknownObject::InternalQueryInterface
|
|
//=--------------------------------------------------------------------------=
|
|
// objects that are aggregated use this to support additional interfaces.
|
|
// they should call this method on their parent so that any of it's interfaces
|
|
// are queried.
|
|
//
|
|
// Parameters:
|
|
// REFIID - [in] interface they want
|
|
// void ** - [out] where they want to put the resulting object ptr.
|
|
//
|
|
// Output:
|
|
// HRESULT - S_OK, E_NOINTERFACE
|
|
|
|
HRESULT CUnknownObject::InternalQueryInterface(REFIID riid, void **ppvObjOut)
|
|
{
|
|
*ppvObjOut = NULL;
|
|
|
|
return E_NOINTERFACE;
|
|
}
|