1 files changed, 100 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/win/dllmain-win.cpp b/src/VBox/Runtime/r3/win/dllmain-win.cpp
new file mode 100644
index 00000000..b52d059b
--- /dev/null
+++ b/src/VBox/Runtime/r3/win/dllmain-win.cpp
@@ -0,0 +1,100 @@
+/* $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;
+}
+