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/* $Id: dllmain-win.cpp $ */
/** @file
* IPRT - Win32 DllMain (Ring-3).
*/
/*
* Copyright (C) 2006-2023 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>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/win/windows.h>
#include <iprt/thread.h>
#include <iprt/param.h>
#include "internal/thread.h"
/**
* Increases the load count on the IPRT DLL so it won't unload.
*
* This is a separate function so as to not overflow the stack of threads with
* very little of it.
*
* @param hModule The IPRT DLL module handle.
*/
DECL_NO_INLINE(static, void) EnsureNoUnload(HMODULE hModule)
{
WCHAR wszName[RTPATH_MAX];
SetLastError(NO_ERROR);
if ( GetModuleFileNameW(hModule, wszName, RT_ELEMENTS(wszName)) > 0
&& GetLastError() == NO_ERROR)
{
int cExtraLoads = 32;
while (cExtraLoads-- > 0)
LoadLibraryW(wszName);
}
}
/**
* The Dll main entry point.
*/
BOOL __stdcall DllMain(HANDLE hModule, DWORD dwReason, PVOID pvReserved)
{
RT_NOREF_PV(pvReserved);
switch (dwReason)
{
/*
* When attaching to a process, we'd like to make sure IPRT stays put
* and doesn't get unloaded.
*/
case DLL_PROCESS_ATTACH:
EnsureNoUnload((HMODULE)hModule);
break;
case DLL_PROCESS_DETACH:
case DLL_THREAD_ATTACH:
default:
/* ignore */
break;
case DLL_THREAD_DETACH:
rtThreadWinTlsDestruction();
rtThreadNativeDetach();
break;
}
return TRUE;
}
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