370 lines
9.1 KiB
C++
370 lines
9.1 KiB
C++
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/* File: factory.cpp
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Description: Contains the member function definitions for class
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DiskQuotaUIClassFactory. The class factory object generates
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new instances of DiskQuotaControl objects. The object implements
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IClassFactory.
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Revision History:
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Date Description Programmer
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-------- ----------- ----------
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05/22/96 Initial creation. BrianAu
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08/15/96 Added shell extension support. BrianAu
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02/04/98 Added creation of IComponent. BrianAu
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06/25/98 Disabled MMC snapin code. BrianAu
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*/
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#include "pch.h" // PCH
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#pragma hdrstop
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#include "factory.h"
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#include "extinit.h"
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#include "snapin.h"
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#include "resource.h"
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#include "guidsp.h"
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// Verify that build is UNICODE.
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#if !defined(UNICODE)
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# error This module must be compiled UNICODE.
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#endif
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extern LONG g_cLockThisDll; // Supports LockServer().
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/* Function: DiskQuotaUIClassFactory::QueryInterface
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Description: Retrieves a pointer to the IUnknown or IClassFactory
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interface. Recoginizes the IID_IUnknown and IID_IClassFactory
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interface IDs.
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Arguments:
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riid - Reference to requested interface ID.
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ppvOut - Address of interface pointer variable to accept interface ptr.
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Returns:
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NO_ERROR - Success.
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E_NOINTERFACE - Requested interface not supported.
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E_INVALIDARG - ppvOut argument was NULL.
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Revision History:
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Date Description Programmer
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-------- ----------- ----------
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05/22/96 Initial creation. BrianAu
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08/15/96 Added IShellPropSheetExt BrianAu
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*/
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STDMETHODIMP
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DiskQuotaUIClassFactory::QueryInterface(
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REFIID riid,
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LPVOID *ppvOut
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)
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{
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DBGTRACE((DM_COM, DL_HIGH, TEXT("DiskQuotaUIClassFactory::QueryInterface")));
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HRESULT hResult = E_NOINTERFACE;
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if (NULL == ppvOut)
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return E_INVALIDARG;
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*ppvOut = NULL;
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if (IID_IUnknown == riid || IID_IClassFactory == riid)
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{
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*ppvOut = this;
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((LPUNKNOWN)*ppvOut)->AddRef();
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hResult = NOERROR;
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}
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return hResult;
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}
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/* Function: DiskQuotaUIClassFactory::AddRef
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Description: Increments object reference count.
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Arguments: None.
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Returns: New reference count value.
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Revision History:
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Date Description Programmer
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-------- ----------- ----------
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05/22/96 Initial creation. BrianAu
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*/
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STDMETHODIMP_(ULONG)
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DiskQuotaUIClassFactory::AddRef(
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VOID
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)
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{
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ULONG ulReturn = m_cRef + 1;
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DBGPRINT((DM_COM, DL_HIGH, TEXT("DiskQuotaUIClassFactory::AddRef, 0x%08X %d -> %d"),
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this, ulReturn - 1, ulReturn));
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InterlockedIncrement(&m_cRef);
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return ulReturn;
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}
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/* Function: DiskQuotaUIClassFactory::Release
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Description: Decrements object reference count. If count drops to 0,
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object is deleted.
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Arguments: None.
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Returns: New reference count value.
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Revision History:
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Date Description Programmer
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-------- ----------- ----------
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05/22/96 Initial creation. BrianAu
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*/
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STDMETHODIMP_(ULONG)
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DiskQuotaUIClassFactory::Release(
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VOID
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)
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{
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ULONG ulReturn = m_cRef - 1;
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DBGPRINT((DM_COM, DL_HIGH, TEXT("DiskQuotaUIClassFactory::Release, 0x%08X %d -> %d"),
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this, ulReturn + 1, ulReturn));
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if (InterlockedDecrement(&m_cRef) == 0)
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{
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delete this;
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ulReturn = 0;
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}
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return ulReturn;
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}
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/* Function: DiskQuotaUIClassFactory::CreateInstance
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Description: Creates a new instance of a DiskQuotaControl object, returning
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a pointer to its IDiskQuotaControl interface.
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Arguments:
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pUnkOuter - Pointer to outer object's IUnknown interface for IUnknown
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delegation in support of aggregation. Aggregation is not supported
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by IDiskQuotaControl.
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riid - Reference to interface ID being requested.
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ppvOut - Address of interface pointer variable to accept interface
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pointer.
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Returns:
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NO_ERROR - Success.
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CLASS_E_NOAGGREGATION - Aggregation was requested but is not supported.
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E_OUTOFMEMORY - Insufficient memory to create new object.
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E_NOINTERFACE - Requested interface not supported.
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E_INVALIDARG - ppvOut arg was NULL.
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Revision History:
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Date Description Programmer
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-------- ----------- ----------
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05/22/96 Initial creation. BrianAu
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08/15/96 Added shell extension support. BrianAu
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*/
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STDMETHODIMP
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DiskQuotaUIClassFactory::CreateInstance(
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LPUNKNOWN pUnkOuter,
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REFIID riid,
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LPVOID *ppvOut
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)
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{
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DBGTRACE((DM_COM, DL_HIGH, TEXT("DiskQuotaUIClassFactory::CreateInstance")));
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HRESULT hResult = NO_ERROR;
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TCHAR szGUID[MAX_PATH];
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StringFromGUID2(riid, szGUID, sizeof(szGUID));
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DBGPRINT((DM_COM, DL_HIGH, TEXT("CreateInstance: %s"), szGUID));
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if (NULL == ppvOut)
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return E_INVALIDARG;
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*ppvOut = NULL;
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try
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{
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if (NULL != pUnkOuter && IID_IUnknown != riid)
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{
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hResult = CLASS_E_NOAGGREGATION;
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}
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else
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{
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InstanceProxy *pip = new InstanceProxy;
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hResult = pip->QueryInterface(riid, ppvOut);
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if (IID_IUnknown != riid || FAILED(hResult))
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{
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// Either caller requested something other than IUnknown
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// or QI failed. We can delete the instance proxy.
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// It's only necessary to keep around if the caller asked
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// for IUnknown.
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delete pip;
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}
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}
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}
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catch(CAllocException& e)
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{
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hResult = E_OUTOFMEMORY;
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}
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catch(...)
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{
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hResult = E_UNEXPECTED;
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}
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return hResult;
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}
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/* Function: DiskQuotaUIClassFactory::LockServer
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Description: Places/removes a lock on the DLL server. See OLE 2
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documentation of IClassFactory for details.
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Arguments:
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fLock - TRUE = Increment lock count, FALSE = Decrement lock count.
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Returns:
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S_OK - Success.
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S_FALSE - Lock count is already 0. Can't be decremented.
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Revision History:
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Date Description Programmer
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-------- ----------- ----------
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05/22/96 Initial creation. BrianAu
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*/
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STDMETHODIMP
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DiskQuotaUIClassFactory::LockServer(
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BOOL fLock
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)
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{
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DBGTRACE((DM_COM, DL_HIGH, TEXT("DiskQuotaUIClassFactory::LockServer")));
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HRESULT hResult = S_OK;
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if (fLock)
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{
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// Increment the lock count.
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InterlockedIncrement(&g_cLockThisDll);
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}
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else
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{
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// Decrement only if lock count is > 0.
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// Otherwise, it's an error.
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LONG lLock = g_cLockThisDll - 1;
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if (0 <= lLock)
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{
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InterlockedDecrement(&g_cLockThisDll);
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CoFreeUnusedLibraries();
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}
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else
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hResult = S_FALSE; // Lock count already at 0.
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}
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return hResult;
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}
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HRESULT
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InstanceProxy::QueryInterface(
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REFIID riid,
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LPVOID *ppvOut
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)
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{
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HRESULT hResult = E_NOINTERFACE;
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DBGTRACE((DM_COM, DL_HIGH, TEXT("InstanceProxy::QueryInterface")));
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if (NULL == ppvOut)
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return E_INVALIDARG;
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*ppvOut = NULL;
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if (IID_IUnknown == riid)
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{
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DBGPRINT((DM_COM, DL_MID, TEXT("Requested IID_IUnknown")));
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*ppvOut = this;
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((LPUNKNOWN)*ppvOut)->AddRef();
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hResult = NOERROR;
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}
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#ifdef POLICY_MMC_SNAPIN
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else if (IID_IComponentData == riid)
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{
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DBGPRINT((DM_COM, DL_MID, TEXT("Requested IID_IComponentData")));
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CSnapInCompData *psicd = new CSnapInCompData(g_hInstDll,
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CString(g_hInstDll, IDS_SNAPIN_NAME),
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CLSID_DiskQuotaUI);
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hResult = psicd->QueryInterface(riid, ppvOut);
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if (FAILED(hResult))
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delete psicd;
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}
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#endif // POLICY_MMC_SNAPIN
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else if (IID_IShellExtInit == riid)
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{
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DBGPRINT((DM_COM, DL_MID, TEXT("Requested IID_IShellExtInit")));
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ShellExtInit *pExtInit = new ShellExtInit;
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hResult = pExtInit->QueryInterface(IID_IShellExtInit, ppvOut);
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if (FAILED(hResult))
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delete pExtInit;
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}
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return hResult;
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}
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ULONG
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InstanceProxy::AddRef(
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VOID
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)
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{
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DBGTRACE((DM_COM, DL_MID, TEXT("InstanceProxy::AddRef")));
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ULONG ulReturn = m_cRef + 1;
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InterlockedIncrement(&m_cRef);
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return ulReturn;
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}
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ULONG
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InstanceProxy::Release(
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VOID
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)
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{
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DBGTRACE((DM_COM, DL_MID, TEXT("InstanceProxy::Release")));
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ULONG ulReturn = m_cRef - 1;
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if (InterlockedDecrement(&m_cRef) == 0)
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{
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delete this;
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ulReturn = 0;
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}
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return ulReturn;
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}
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