mariadb/mysys/my_getncpus.c

/* Copyright (C) 2006 MySQL AB

   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; version 2 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, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

/* get the number of (online) CPUs */

#include "mysys_priv.h"
#include <unistd.h>

static int ncpus=0;

#ifdef _SC_NPROCESSORS_ONLN
int my_getncpus()
{
  if (!ncpus)
    ncpus= sysconf(_SC_NPROCESSORS_ONLN);
  return ncpus;
}

#else
/* unknown */
int my_getncpus()
{
  return 2;
}

#endif