| 1 | /* $Id: dllmain-win.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Win32 DllMain (Ring-3).
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #include <iprt/win/windows.h>
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| 42 | #include <iprt/thread.h>
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| 43 | #include <iprt/param.h>
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| 44 | #include "internal/thread.h"
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| 45 |
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| 46 |
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| 47 |
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| 48 | /**
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| 49 | * Increases the load count on the IPRT DLL so it won't unload.
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| 50 | *
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| 51 | * This is a separate function so as to not overflow the stack of threads with
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| 52 | * very little of it.
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| 53 | *
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| 54 | * @param hModule The IPRT DLL module handle.
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| 55 | */
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| 56 | DECL_NO_INLINE(static, void) EnsureNoUnload(HMODULE hModule)
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| 57 | {
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| 58 | WCHAR wszName[RTPATH_MAX];
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| 59 | SetLastError(NO_ERROR);
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| 60 | if ( GetModuleFileNameW(hModule, wszName, RT_ELEMENTS(wszName)) > 0
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| 61 | && GetLastError() == NO_ERROR)
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| 62 | {
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| 63 | int cExtraLoads = 32;
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| 64 | while (cExtraLoads-- > 0)
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| 65 | LoadLibraryW(wszName);
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| 66 | }
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| 67 | }
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| 68 |
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| 69 |
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| 70 | /**
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| 71 | * The Dll main entry point.
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| 72 | */
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| 73 | BOOL __stdcall DllMain(HANDLE hModule, DWORD dwReason, PVOID pvReserved)
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| 74 | {
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| 75 | RT_NOREF_PV(pvReserved);
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| 76 |
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| 77 | switch (dwReason)
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| 78 | {
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| 79 | /*
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| 80 | * When attaching to a process, we'd like to make sure IPRT stays put
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| 81 | * and doesn't get unloaded.
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| 82 | */
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| 83 | case DLL_PROCESS_ATTACH:
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| 84 | EnsureNoUnload((HMODULE)hModule);
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| 85 | break;
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| 86 |
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| 87 | case DLL_PROCESS_DETACH:
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| 88 | case DLL_THREAD_ATTACH:
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| 89 | default:
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| 90 | /* ignore */
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| 91 | break;
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| 92 |
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| 93 | case DLL_THREAD_DETACH:
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| 94 | rtThreadWinTlsDestruction();
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| 95 | rtThreadNativeDetach();
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| 96 | break;
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| 97 | }
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| 98 | return TRUE;
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| 99 | }
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| 100 |
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