Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 174 insertions, 0 deletions

diff --git a/src/VBox/Runtime/r0drv/initterm-r0drv.cpp b/src/VBox/Runtime/r0drv/initterm-r0drv.cpp
new file mode 100644
index 00000000..bfa0546d
--- /dev/null
+++ b/src/VBox/Runtime/r0drv/initterm-r0drv.cpp
@@ -0,0 +1,174 @@
+/* $Id: initterm-r0drv.cpp $ */
+/** @file
+ * IPRT - Initialization & Termination, R0 Driver, Common.
+ */
+
+/*
+ * Copyright (C) 2006-2022 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/initterm.h>
+#include "internal/iprt.h"
+
+#include <iprt/asm.h>
+#include <iprt/assert.h>
+#include <iprt/err.h>
+#include <iprt/mp.h>
+#include <iprt/thread.h>
+#ifndef IN_GUEST /* play safe for now */
+# include "r0drv/mp-r0drv.h"
+# include "r0drv/power-r0drv.h"
+#endif
+
+#include "internal/initterm.h"
+#include "internal/mem.h"
+#include "internal/thread.h"
+
+
+/*********************************************************************************************************************************
+*   Global Variables                                                                                                             *
+*********************************************************************************************************************************/
+/** Count of current IPRT users.
+ * In ring-0 several drivers / kmods / kexts / wossnames may share the
+ * same runtime code. So, we need to keep count in order not to terminate
+ * it prematurely. */
+static int32_t volatile g_crtR0Users = 0;
+
+
+/**
+ * Initializes the ring-0 driver runtime library.
+ *
+ * @returns iprt status code.
+ * @param   fReserved       Flags reserved for the future.
+ */
+RTR0DECL(int) RTR0Init(unsigned fReserved)
+{
+    int rc;
+    uint32_t cNewUsers;
+    Assert(fReserved == 0); RT_NOREF_PV(fReserved);
+#ifndef RT_OS_SOLARIS       /* On Solaris our thread preemption information is only obtained in rtR0InitNative().*/
+    RT_ASSERT_PREEMPTIBLE();
+#endif
+
+    /*
+     * The first user initializes it.
+     * We rely on the module loader to ensure that there are no
+     * initialization races should two modules share the IPRT.
+     */
+    cNewUsers = ASMAtomicIncS32(&g_crtR0Users);
+    if (cNewUsers != 1)
+    {
+        if (cNewUsers > 1)
+            return VINF_SUCCESS;
+        ASMAtomicDecS32(&g_crtR0Users);
+        return VERR_INTERNAL_ERROR_3;
+    }
+
+    rc = rtR0InitNative();
+    if (RT_SUCCESS(rc))
+    {
+#ifdef RTR0MEM_WITH_EF_APIS
+        rtR0MemEfInit();
+#endif
+        rc = rtThreadInit();
+        if (RT_SUCCESS(rc))
+        {
+#ifndef IN_GUEST /* play safe for now */
+            rc = rtR0MpNotificationInit();
+            if (RT_SUCCESS(rc))
+            {
+                rc = rtR0PowerNotificationInit();
+                if (RT_SUCCESS(rc))
+                    return rc;
+                rtR0MpNotificationTerm();
+            }
+#else
+            if (RT_SUCCESS(rc))
+                return rc;
+#endif
+            rtThreadTerm();
+        }
+#ifdef RTR0MEM_WITH_EF_APIS
+        rtR0MemEfTerm();
+#endif
+        rtR0TermNative();
+    }
+    return rc;
+}
+RT_EXPORT_SYMBOL(RTR0Init);
+
+
+static void rtR0Term(void)
+{
+    rtThreadTerm();
+#ifndef IN_GUEST /* play safe for now */
+    rtR0PowerNotificationTerm();
+    rtR0MpNotificationTerm();
+#endif
+#ifdef RTR0MEM_WITH_EF_APIS
+    rtR0MemEfTerm();
+#endif
+    rtR0TermNative();
+}
+
+
+/**
+ * Terminates the ring-0 driver runtime library.
+ */
+RTR0DECL(void) RTR0Term(void)
+{
+    int32_t cNewUsers;
+    RT_ASSERT_PREEMPTIBLE();
+
+    cNewUsers = ASMAtomicDecS32(&g_crtR0Users);
+    Assert(cNewUsers >= 0);
+    if (cNewUsers == 0)
+        rtR0Term();
+    else if (cNewUsers < 0)
+        ASMAtomicIncS32(&g_crtR0Users);
+}
+RT_EXPORT_SYMBOL(RTR0Term);
+
+
+/* Note! Should *not* be exported since it's only for static linking. */
+RTR0DECL(void) RTR0TermForced(void)
+{
+    RT_ASSERT_PREEMPTIBLE();
+
+    AssertMsg(g_crtR0Users == 1, ("%d\n", g_crtR0Users));
+    ASMAtomicWriteS32(&g_crtR0Users, 0);
+
+    rtR0Term();
+}
+