152 lines
3.1 KiB
C++
152 lines
3.1 KiB
C++
//
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// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
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// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
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// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
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// PARTICULAR PURPOSE.
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// Standard dll required functions and class factory implementation.
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#include <windows.h>
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#include <unknwn.h>
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#include "Dll.h"
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#include "helpers.h"
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static LONG g_cRef = 0; // global dll reference count
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HINSTANCE g_hinst = NULL; // global dll hinstance
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extern HRESULT CSample_CreateInstance(__in REFIID riid, __deref_out void** ppv);
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EXTERN_C GUID CLSID_CSample;
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class CClassFactory : public IClassFactory
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{
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public:
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CClassFactory() : _cRef(1)
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{
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}
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// IUnknown
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IFACEMETHODIMP QueryInterface(__in REFIID riid, __deref_out void **ppv)
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{
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static const QITAB qit[] =
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{
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QITABENT(CClassFactory, IClassFactory),
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{ 0 },
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};
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return QISearch(this, qit, riid, ppv);
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}
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IFACEMETHODIMP_(ULONG) AddRef()
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{
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return InterlockedIncrement(&_cRef);
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}
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IFACEMETHODIMP_(ULONG) Release()
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{
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LONG cRef = InterlockedDecrement(&_cRef);
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if (!cRef)
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delete this;
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return cRef;
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}
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// IClassFactory
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IFACEMETHODIMP CreateInstance(__in IUnknown* pUnkOuter, __in REFIID riid, __deref_out void **ppv)
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{
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HRESULT hr;
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if (!pUnkOuter)
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{
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hr = CSample_CreateInstance(riid, ppv);
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}
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else
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{
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*ppv = NULL;
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hr = CLASS_E_NOAGGREGATION;
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}
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return hr;
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}
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IFACEMETHODIMP LockServer(__in BOOL bLock)
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{
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if (bLock)
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{
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DllAddRef();
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}
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else
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{
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DllRelease();
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}
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return S_OK;
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}
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private:
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~CClassFactory()
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{
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}
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long _cRef;
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};
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HRESULT CClassFactory_CreateInstance(__in REFCLSID rclsid, __in REFIID riid, __deref_out void **ppv)
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{
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*ppv = NULL;
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HRESULT hr;
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if (CLSID_CSample == rclsid)
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{
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CClassFactory* pcf = new CClassFactory();
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if (pcf)
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{
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hr = pcf->QueryInterface(riid, ppv);
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pcf->Release();
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}
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else
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{
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hr = E_OUTOFMEMORY;
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}
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}
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else
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{
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hr = CLASS_E_CLASSNOTAVAILABLE;
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}
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return hr;
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}
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void DllAddRef()
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{
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InterlockedIncrement(&g_cRef);
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}
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void DllRelease()
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{
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InterlockedDecrement(&g_cRef);
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}
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STDAPI DllCanUnloadNow()
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{
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return (g_cRef > 0) ? S_FALSE : S_OK;
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}
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STDAPI DllGetClassObject(__in REFCLSID rclsid, __in REFIID riid, __deref_out void** ppv)
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{
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return CClassFactory_CreateInstance(rclsid, riid, ppv);
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}
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STDAPI_(BOOL) DllMain(__in HINSTANCE hinstDll, __in DWORD dwReason, __in void *)
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{
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switch (dwReason)
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{
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case DLL_PROCESS_ATTACH:
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DisableThreadLibraryCalls(hinstDll);
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break;
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case DLL_PROCESS_DETACH:
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case DLL_THREAD_ATTACH:
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case DLL_THREAD_DETACH:
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break;
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}
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g_hinst = hinstDll;
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return TRUE;
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}
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