4 * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; only
9 * version 2.1 of the License.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 int __num_possible_cpus
;
29 void _get_num_possible_cpus(void)
33 /* On Linux, when some processors are offline
34 * _SC_NPROCESSORS_CONF counts the offline
35 * processors, whereas _SC_NPROCESSORS_ONLN
36 * does not. If we used _SC_NPROCESSORS_ONLN,
37 * getcpu() could return a value greater than
38 * this sysconf, in which case the arrays
39 * indexed by processor would overflow.
41 result
= sysconf(_SC_NPROCESSORS_CONF
);
44 __num_possible_cpus
= result
;
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