1 files changed, 89 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/posix/RTMpGetCount-posix.cpp b/src/VBox/Runtime/r3/posix/RTMpGetCount-posix.cpp
new file mode 100644
index 00000000..f48d6f98
--- /dev/null
+++ b/src/VBox/Runtime/r3/posix/RTMpGetCount-posix.cpp
@@ -0,0 +1,89 @@
+/* $Id: RTMpGetCount-posix.cpp $ */
+/** @file
+ * IPRT - RTMpGetCount, POSIX.
+ */
+
+/*
+ * 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/mp.h>
+#include <iprt/assert.h>
+
+#include <unistd.h>
+#if !defined(RT_OS_SOLARIS)
+# include <sys/sysctl.h>
+#endif
+
+
+RTDECL(RTCPUID) RTMpGetCount(void)
+{
+    /*
+     * The sysconf way (linux and others).
+     */
+#if defined(_SC_NPROCESSORS_MAX) || defined(_SC_NPROCESSORS_CONF) || defined(_SC_NPROCESSORS_ONLN)
+    int cCpusSC = -1;
+# ifdef _SC_NPROCESSORS_MAX
+    int cMax = sysconf(_SC_NPROCESSORS_MAX);
+    cCpusSC = RT_MAX(cCpusSC, cMax);
+# endif
+# ifdef _SC_NPROCESSORS_CONF
+    int cConf = sysconf(_SC_NPROCESSORS_CONF);
+    cCpusSC = RT_MAX(cCpusSC, cConf);
+# endif
+# ifdef _SC_NPROCESSORS_ONLN
+    int cOnln = sysconf(_SC_NPROCESSORS_ONLN);
+    cCpusSC = RT_MAX(cCpusSC, cOnln);
+# endif
+    Assert(cCpusSC > 0);
+    if (cCpusSC > 0)
+        return cCpusSC;
+#endif
+
+    /*
+     * The BSD 4.4 way.
+     */
+#if defined(CTL_HW) && defined(HW_NCPU)
+    int aiMib[2];
+    aiMib[0] = CTL_HW;
+    aiMib[1] = HW_NCPU;
+    int cCpus = -1;
+    size_t cb = sizeof(cCpus);
+    int rc = sysctl(aiMib, RT_ELEMENTS(aiMib), &cCpus, &cb, NULL, 0);
+    if (rc != -1 && cCpus >= 1)
+        return cCpus;
+#endif
+    return 1;
+}
+