Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg

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

1 files changed, 72 insertions, 0 deletions

diff --git a/src/VBox/Runtime/generic/RTMpGetArraySize-generic.cpp b/src/VBox/Runtime/generic/RTMpGetArraySize-generic.cpp
new file mode 100644
index 00000000..2e61c071
--- /dev/null
+++ b/src/VBox/Runtime/generic/RTMpGetArraySize-generic.cpp
@@ -0,0 +1,72 @@
+/* $Id: RTMpGetArraySize-generic.cpp $ */
+/** @file
+ * IPRT - Multiprocessor, Generic RTMpGetArraySize.
+ */
+
+/*
+ * Copyright (C) 2010-2023 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/mp.h>
+#include "internal/iprt.h"
+
+#include <iprt/asm.h>
+#include <iprt/cpuset.h>
+
+
+RTDECL(uint32_t) RTMpGetArraySize(void)
+{
+    /*
+     * Cache the result here.  This whole point of this function is that it
+     * will always return the same value, so that should be safe.
+     *
+     * Note! Because RTCPUSET may be to small to represent all the CPUs, we
+     *       check with RTMpGetCount() as well.
+     */
+    static uint32_t s_cMaxCpus = 0;
+    uint32_t cCpus = s_cMaxCpus;
+    if (RT_UNLIKELY(cCpus == 0))
+    {
+        RTCPUSET    CpuSet;
+        uint32_t    cCpus1 = RTCpuLastIndex(RTMpGetSet(&CpuSet)) + 1;
+        uint32_t    cCpus2 = RTMpGetCount();
+        cCpus              = RT_MAX(cCpus1, cCpus2);
+        ASMAtomicCmpXchgU32(&s_cMaxCpus, cCpus, 0);
+        return cCpus;
+    }
+    return s_cMaxCpus;
+
+}
+RT_EXPORT_SYMBOL(RTMpGetArraySize);
+