+/* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
+ *
+ * libtest
+ *
+ * Copyright (C) 2012 Data Differential, http://datadifferential.com/
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <libtest/common.h>
+
+#include <unistd.h>
+
+namespace libtest {
+
+size_t number_of_cpus()
+{
+ size_t number_of_cpu= 1;
+#ifdef TARGET_OS_LINUX
+ number_of_cpu= sysconf(_SC_NPROCESSORS_ONLN);
+#elif TARGET_OS_OSX || TARGET_OS_FREEBSD
+ int mib[4];
+ size_t len= sizeof(number_of_cpu);
+
+ /* set the mib for hw.ncpu */
+ mib[0] = CTL_HW;
+ mib[1] = HW_AVAILCPU; // alternatively, try HW_NCPU;
+
+ /* get the number of CPUs from the system */
+ sysctl(mib, 2, &number_of_cpu, &len, NULL, 0);
+
+ if (number_of_cpu < 1)
+ {
+ mib[1]= HW_NCPU;
+ sysctl(mib, 2, &number_of_cpu, &len, NULL, 0 );
+
+ if (number_of_cpu < 1 )
+ {
+ number_of_cpu = 1;
+ }
+ }
+#endif
+
+ return number_of_cpu;
+}
+
+} // namespace libtest