1 files changed, 85 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/win/errvars-win.cpp b/src/VBox/Runtime/r3/win/errvars-win.cpp
new file mode 100644
index 00000000..3dee2f07
--- /dev/null
+++ b/src/VBox/Runtime/r3/win/errvars-win.cpp
@@ -0,0 +1,85 @@
+/* $Id: errvars-win.cpp $ */
+/** @file
+ * IPRT - Save and Restore Error Variables, Windows Ring-3.
+ */
+
+/*
+ * Copyright (C) 2011-2020 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE 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.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include <iprt/win/winsock2.h>
+#include <errno.h>
+
+#include <iprt/errcore.h>
+#include "internal/iprt.h"
+
+#include <iprt/assert.h>
+#include "internal/magics.h"
+#include "internal-r3-win.h"
+
+
+
+RTDECL(PRTERRVARS) RTErrVarsSave(PRTERRVARS pVars)
+{
+    pVars->ai32Vars[0] = RTERRVARS_MAGIC;
+    pVars->ai32Vars[1] = GetLastError();
+    pVars->ai32Vars[2] = g_pfnWSAGetLastError ? g_pfnWSAGetLastError() : WSANOTINITIALISED;
+    pVars->ai32Vars[3] = errno;
+    return pVars;
+}
+
+
+RTDECL(void) RTErrVarsRestore(PCRTERRVARS pVars)
+{
+    AssertReturnVoid(pVars->ai32Vars[0] == RTERRVARS_MAGIC);
+    errno = pVars->ai32Vars[3];
+    if (   pVars->ai32Vars[2] != WSANOTINITIALISED
+        && g_pfnWSASetLastError)
+        g_pfnWSASetLastError(pVars->ai32Vars[2]);
+    SetLastError(pVars->ai32Vars[1]);
+}
+
+
+RTDECL(bool) RTErrVarsAreEqual(PCRTERRVARS pVars1, PCRTERRVARS pVars2)
+{
+    Assert(pVars1->ai32Vars[0] == RTERRVARS_MAGIC);
+    Assert(pVars2->ai32Vars[0] == RTERRVARS_MAGIC);
+
+    return pVars1->ai32Vars[0] == pVars2->ai32Vars[0]
+        && pVars1->ai32Vars[1] == pVars2->ai32Vars[1]
+        && pVars1->ai32Vars[2] == pVars2->ai32Vars[2]
+        && pVars1->ai32Vars[3] == pVars2->ai32Vars[3];
+}
+
+
+RTDECL(bool) RTErrVarsHaveChanged(PCRTERRVARS pVars)
+{
+    Assert(pVars->ai32Vars[0] == RTERRVARS_MAGIC);
+
+    return pVars->ai32Vars[0] != RTERRVARS_MAGIC
+        || (uint32_t)pVars->ai32Vars[1] != GetLastError()
+        || pVars->ai32Vars[2] != (g_pfnWSAGetLastError ? g_pfnWSAGetLastError() : WSANOTINITIALISED)
+        || pVars->ai32Vars[3] != errno;
+}
+