|
1
by brian
clean slate |
1 |
/* Copyright (C) 2006 MySQL AB
|
2 |
||
3 |
This program is free software; you can redistribute it and/or modify
|
|
4 |
it under the terms of the GNU General Public License as published by
|
|
5 |
the Free Software Foundation; version 2 of the License.
|
|
6 |
||
7 |
This program is distributed in the hope that it will be useful,
|
|
8 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
9 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
10 |
GNU General Public License for more details.
|
|
11 |
||
12 |
You should have received a copy of the GNU General Public License
|
|
13 |
along with this program; if not, write to the Free Software
|
|
14 |
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
|
|
15 |
||
16 |
/* get the number of (online) CPUs */
|
|
17 |
||
18 |
#include "mysys_priv.h" |
|
19 |
#ifdef HAVE_UNISTD_H
|
|
20 |
#include <unistd.h> |
|
21 |
#endif
|
|
22 |
||
23 |
static int ncpus=0; |
|
24 |
||
25 |
int my_getncpus() |
|
26 |
{
|
|
27 |
if (!ncpus) |
|
28 |
{
|
|
29 |
#ifdef _SC_NPROCESSORS_ONLN
|
|
30 |
ncpus= sysconf(_SC_NPROCESSORS_ONLN); |
|
31 |
#else
|
|
32 |
/* unknown so play safe: assume SMP and forbid uniprocessor build */
|
|
33 |
ncpus= 2; |
|
34 |
#endif
|
|
35 |
}
|
|
36 |
return ncpus; |
|
37 |
}
|