diff options
Diffstat (limited to 'src/VBox/Main/src-client/win/dllmain.cpp')
| -rw-r--r-- | src/VBox/Main/src-client/win/dllmain.cpp | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/src/VBox/Main/src-client/win/dllmain.cpp b/src/VBox/Main/src-client/win/dllmain.cpp new file mode 100644 index 00000000..3c681291 --- /dev/null +++ b/src/VBox/Main/src-client/win/dllmain.cpp @@ -0,0 +1,176 @@ +/* $Id: dllmain.cpp $ */ +/** @file + * VBoxC - COM DLL exports and DLL init/term. + */ + +/* + * Copyright (C) 2006-2022 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * SPDX-License-Identifier: GPL-3.0-only + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include "VBox/com/defs.h" + +#include <SessionImpl.h> +#include <VirtualBoxClientImpl.h> + +#include <iprt/initterm.h> + + +/********************************************************************************************************************************* +* Global Variables * +*********************************************************************************************************************************/ +static ATL::CComModule *g_pAtlComModule; + +BEGIN_OBJECT_MAP(ObjectMap) + OBJECT_ENTRY(CLSID_Session, Session) + OBJECT_ENTRY(CLSID_VirtualBoxClient, VirtualBoxClient) +END_OBJECT_MAP() + + +///////////////////////////////////////////////////////////////////////////// +// DLL Entry Point + +extern "C" +BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID /*lpReserved*/) +{ + if (dwReason == DLL_PROCESS_ATTACH) + { + // idempotent, so doesn't harm, and needed for COM embedding scenario + RTR3InitDll(RTR3INIT_FLAGS_UNOBTRUSIVE); + + g_pAtlComModule = new(ATL::CComModule); + if (!g_pAtlComModule) + return FALSE; + + g_pAtlComModule->Init(ObjectMap, hInstance, &LIBID_VirtualBox); + DisableThreadLibraryCalls(hInstance); + } + else if (dwReason == DLL_PROCESS_DETACH) + { + if (g_pAtlComModule) + { + g_pAtlComModule->Term(); + delete g_pAtlComModule; + g_pAtlComModule = NULL; + } + } + return TRUE; +} + +///////////////////////////////////////////////////////////////////////////// +// Used to determine whether the DLL can be unloaded by OLE + +STDAPI DllCanUnloadNow(void) +{ + AssertReturn(g_pAtlComModule, S_OK); + LONG const cLocks = g_pAtlComModule->GetLockCount(); + Assert(cLocks >= VirtualBoxClient::s_cUnnecessaryAtlModuleLocks); + return cLocks <= VirtualBoxClient::s_cUnnecessaryAtlModuleLocks ? S_OK : S_FALSE; +} + +///////////////////////////////////////////////////////////////////////////// +// Returns a class factory to create an object of the requested type + +STDAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv) +{ + AssertReturn(g_pAtlComModule, E_UNEXPECTED); + return g_pAtlComModule->GetClassObject(rclsid, riid, ppv); +} + +///////////////////////////////////////////////////////////////////////////// +// DllRegisterServer - Adds entries to the system registry + +STDAPI DllRegisterServer(void) +{ +#ifndef VBOX_WITH_MIDL_PROXY_STUB + // registers object, typelib and all interfaces in typelib + AssertReturn(g_pAtlComModule, E_UNEXPECTED); + return g_pAtlComModule->RegisterServer(TRUE); +#else + return S_OK; /* VBoxProxyStub does all the work, no need to duplicate it here. */ +#endif +} + +///////////////////////////////////////////////////////////////////////////// +// DllUnregisterServer - Removes entries from the system registry + +STDAPI DllUnregisterServer(void) +{ +#ifndef VBOX_WITH_MIDL_PROXY_STUB + AssertReturn(g_pAtlComModule, E_UNEXPECTED); + HRESULT hrc = g_pAtlComModule->UnregisterServer(TRUE); + return hrc; +#else + return S_OK; /* VBoxProxyStub does all the work, no need to duplicate it here. */ +#endif +} + + +#ifdef RT_OS_WINDOWS +/* + * HACK ALERT! Really ugly trick to make the VirtualBoxClient object go away + * when nobody uses it anymore. This is to prevent its uninit() + * method from accessing IVirtualBox and similar proxy stubs after + * COM has been officially shut down. + * + * It is simply TOO LATE to destroy the client object from DllMain/detach! + * + * This hack ASSUMES ObjectMap order. + * This hack is subject to a re-instantiation race. + */ +ULONG VirtualBoxClient::InternalRelease() +{ + ULONG cRefs = VirtualBoxClientWrap::InternalRelease(); +# ifdef DEBUG_bird + char szMsg[64]; + RTStrPrintf(szMsg, sizeof(szMsg), "VirtualBoxClient: cRefs=%d\n", cRefs); + OutputDebugStringA(szMsg); +# endif +# if 1 /* enable ugly hack */ + if (cRefs == 1) + { + /* Make the factory to drop its reference. */ + if (ObjectMap[1].pCF) + { + InternalAddRef(); + + CMyComClassFactorySingleton<VirtualBoxClient> *pFactory; + pFactory = dynamic_cast<CMyComClassFactorySingleton<VirtualBoxClient> *>(ObjectMap[1].pCF); + Assert(pFactory); + if (pFactory) + { + IUnknown *pUnknown = pFactory->m_spObj; + pFactory->m_spObj = NULL; + if (pUnknown) + pUnknown->Release(); + } + + cRefs = VirtualBoxClientWrap::InternalRelease(); + } + } +# endif + return cRefs; +} +#endif + |