| 1 | /* $Id: dllmain-win.cpp 93115 2022-01-01 11:31:46Z 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) 2006-2022 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #include <iprt/win/windows.h>
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| 32 | #include <iprt/thread.h>
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| 33 | #include <iprt/param.h>
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| 34 | #include "internal/thread.h"
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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 | * Increases the load count on the IPRT DLL so it won't unload.
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| 40 | *
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| 41 | * This is a separate function so as to not overflow the stack of threads with
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| 42 | * very little of it.
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| 43 | *
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| 44 | * @param hModule The IPRT DLL module handle.
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| 45 | */
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| 46 | DECL_NO_INLINE(static, void) EnsureNoUnload(HMODULE hModule)
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| 47 | {
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| 48 | WCHAR wszName[RTPATH_MAX];
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| 49 | SetLastError(NO_ERROR);
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| 50 | if ( GetModuleFileNameW(hModule, wszName, RT_ELEMENTS(wszName)) > 0
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| 51 | && GetLastError() == NO_ERROR)
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| 52 | {
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| 53 | int cExtraLoads = 32;
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| 54 | while (cExtraLoads-- > 0)
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| 55 | LoadLibraryW(wszName);
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| 56 | }
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| 57 | }
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| 58 |
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| 59 |
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| 60 | /**
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| 61 | * The Dll main entry point.
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| 62 | */
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| 63 | BOOL __stdcall DllMain(HANDLE hModule, DWORD dwReason, PVOID pvReserved)
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| 64 | {
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| 65 | RT_NOREF_PV(pvReserved);
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| 66 |
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| 67 | switch (dwReason)
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| 68 | {
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| 69 | /*
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| 70 | * When attaching to a process, we'd like to make sure IPRT stays put
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| 71 | * and doesn't get unloaded.
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| 72 | */
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| 73 | case DLL_PROCESS_ATTACH:
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| 74 | EnsureNoUnload((HMODULE)hModule);
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| 75 | break;
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| 76 |
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| 77 | case DLL_PROCESS_DETACH:
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| 78 | case DLL_THREAD_ATTACH:
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| 79 | default:
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| 80 | /* ignore */
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| 81 | break;
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| 82 |
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| 83 | case DLL_THREAD_DETACH:
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| 84 | rtThreadWinTlsDestruction();
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| 85 | rtThreadNativeDetach();
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| 86 | break;
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| 87 | }
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| 88 | return TRUE;
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| 89 | }
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| 90 |
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