D:/opendownloadmanager/ODM-1.x/Include.Add/DShow/dllentry.cpp

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/*
  Free Download Manager Copyright (c) 2003-2007 FreeDownloadManager.ORG
  Open Download Manager Copyright (c) 2008-2010 OpenDownloadManager.ORG
*/                    

#include <streams.h>  

#ifdef DEBUG
#ifdef UNICODE
#ifndef _UNICODE
#define _UNICODE
#endif 
#endif 

#include <tchar.h>
#endif 

extern CFactoryTemplate g_Templates[];
extern int g_cTemplates;

HINSTANCE g_hInst;
DWORD     g_amPlatform;         
OSVERSIONINFO g_osInfo;          

class CClassFactory : public IClassFactory, public CBaseObject
{

private:
    const CFactoryTemplate *const m_pTemplate;

    ULONG m_cRef;

    static int m_cLocked;
public:
    CClassFactory(const CFactoryTemplate *);
    
    STDMETHODIMP QueryInterface(REFIID riid, void ** ppv);
    STDMETHODIMP_(ULONG)AddRef();
    STDMETHODIMP_(ULONG)Release();
    
    STDMETHODIMP CreateInstance(LPUNKNOWN pUnkOuter, REFIID riid, void **pv);
    STDMETHODIMP LockServer(BOOL fLock);

    static BOOL IsLocked() {
        return (m_cLocked > 0);
    };
};  

int CClassFactory::m_cLocked = 0;

CClassFactory::CClassFactory(const CFactoryTemplate *pTemplate)
: CBaseObject(NAME("Class Factory"))
, m_cRef(0)
, m_pTemplate(pTemplate)
{
}  

STDMETHODIMP
CClassFactory::QueryInterface(REFIID riid,void **ppv)
{
    CheckPointer(ppv,E_POINTER)
    ValidateReadWritePtr(ppv,sizeof(PVOID));
    *ppv = NULL;

    
    if ((riid == IID_IUnknown) || (riid == IID_IClassFactory)) {
        *ppv = (LPVOID) this;
        
        ((LPUNKNOWN) *ppv)->AddRef();
        return NOERROR;
    }

    return ResultFromScode(E_NOINTERFACE);
}  

STDMETHODIMP_(ULONG)
CClassFactory::AddRef()
{
    return ++m_cRef;
}

STDMETHODIMP_(ULONG)
CClassFactory::Release()
{
    if (--m_cRef == 0) {
        delete this;
        return 0;
    } else {
        return m_cRef;
    }
}

STDMETHODIMP
CClassFactory::CreateInstance(
    LPUNKNOWN pUnkOuter,
    REFIID riid,
    void **pv)
{
    CheckPointer(pv,E_POINTER)
    ValidateReadWritePtr(pv,sizeof(void *));

    if (pUnkOuter != NULL) {
        if (IsEqualIID(riid,IID_IUnknown) == FALSE) {
            return ResultFromScode(E_NOINTERFACE);
        }
    }

    HRESULT hr = NOERROR;
    CUnknown *pObj = m_pTemplate->CreateInstance(pUnkOuter, &hr);

    if (pObj == NULL) {
        if (SUCCEEDED(hr)) {
            hr = E_OUTOFMEMORY;
        }
        return hr;
    }

    if (FAILED(hr)) {
        delete pObj;
        return hr;
    }
    
    pObj->NonDelegatingAddRef();
    hr = pObj->NonDelegatingQueryInterface(riid, pv);
    pObj->NonDelegatingRelease();
 
    if (SUCCEEDED(hr)) {
        ASSERT(*pv);
    }

    return hr;
}

STDMETHODIMP
CClassFactory::LockServer(BOOL fLock)
{
    if (fLock) {
        m_cLocked++;
    } else {
        m_cLocked--;
    }
    return NOERROR;
}        

STDAPI
DllGetClassObject(
    REFCLSID rClsID,
    REFIID riid,
    void **pv)
{
    if (!(riid == IID_IUnknown) && !(riid == IID_IClassFactory)) {
            return E_NOINTERFACE;
    }
     
    for (int i = 0; i < g_cTemplates; i++) {
        const CFactoryTemplate * pT = &g_Templates[i];
        if (pT->IsClassID(rClsID)) {

            *pv = (LPVOID) (LPUNKNOWN) new CClassFactory(pT);
            if (*pv == NULL) {
                return E_OUTOFMEMORY;
            }
            ((LPUNKNOWN)*pv)->AddRef();
            return NOERROR;
        }
    }
    return CLASS_E_CLASSNOTAVAILABLE;
}      

void
DllInitClasses(BOOL bLoading)
{
    int i;
    
    for (i = 0; i < g_cTemplates; i++) {
        const CFactoryTemplate * pT = &g_Templates[i];
        if (pT->m_lpfnInit != NULL) {
            (*pT->m_lpfnInit)(bLoading, pT->m_ClsID);
        }
    }

}              

STDAPI
DllCanUnloadNow()
{
    DbgLog((LOG_MEMORY,2,TEXT("DLLCanUnloadNow called - IsLocked = %d, Active objects = %d"),
        CClassFactory::IsLocked(),
        CBaseObject::ObjectsActive()));

    if (CClassFactory::IsLocked() || CBaseObject::ObjectsActive()) {
        return S_FALSE;
    } else {
        return S_OK;
    }
}          

extern "C" BOOL WINAPI DllEntryPoint(HINSTANCE, ULONG, LPVOID);

BOOL WINAPI
DllEntryPoint(HINSTANCE hInstance, ULONG ulReason, LPVOID pv)
{
#ifdef DEBUG
    extern bool g_fDbgInDllEntryPoint;
    g_fDbgInDllEntryPoint = true;
#endif

    switch (ulReason)
    {

    case DLL_PROCESS_ATTACH:
        DisableThreadLibraryCalls(hInstance);
        DbgInitialise(hInstance);  

        {

            g_amPlatform = VER_PLATFORM_WIN32_WINDOWS; 

            g_osInfo.dwOSVersionInfoSize = sizeof(g_osInfo);
            if (GetVersionEx(&g_osInfo)) {
                g_amPlatform = g_osInfo.dwPlatformId;
            } else {
                DbgLog((LOG_ERROR, 1, TEXT("Failed to get the OS platform, assuming Win95")));
            }
        }
        g_hInst = hInstance;
        DllInitClasses(TRUE);
        break;

    case DLL_PROCESS_DETACH:
        DllInitClasses(FALSE);  

#ifdef DEBUG
        if (CBaseObject::ObjectsActive()) {
            DbgSetModuleLevel(LOG_MEMORY, 2);
            TCHAR szInfo[512];
            extern TCHAR m_ModuleName[];     

            TCHAR FullName[_MAX_PATH];      
            TCHAR *pName;                   

            GetModuleFileName(NULL,FullName,_MAX_PATH);
            pName = _tcsrchr(FullName,'\\');
            if (pName == NULL) {
                pName = FullName;
            } else {
                pName++;
            }

            DWORD cch = wsprintf(szInfo, TEXT("Executable: %s  Pid %x  Tid %x. "),
                            pName, GetCurrentProcessId(), GetCurrentThreadId());

            wsprintf(szInfo+cch, TEXT("Module %s, %d objects left active!"),
                     m_ModuleName, CBaseObject::ObjectsActive());
            DbgAssert(szInfo, TEXT(__FILE__),__LINE__);
            
            DbgDumpObjectRegister();
        }
        DbgTerminate();
#endif
        break;
    }

#ifdef DEBUG
    g_fDbgInDllEntryPoint = false;
#endif
    return TRUE;
}  

---