2 Copyright (C) 2010 Paul Davis
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #include "libpbd-config.h"
27 #elif defined(__APPLE__) || defined(__FreeBSD__)
29 #include <sys/types.h>
30 #include <sys/sysctl.h>
36 hardware_concurrency()
38 #if defined(PTW32_VERSION) || defined(__hpux)
39 return pthread_num_processors_np();
40 #elif defined(__APPLE__) || defined(__FreeBSD__)
42 size_t size=sizeof(count);
43 return sysctlbyname("hw.physicalcpu",&count,&size,NULL,0)?0:count;
44 #elif defined(HAVE_UNISTD) && defined(_SC_NPROCESSORS_ONLN)
45 int const count=sysconf(_SC_NPROCESSORS_ONLN);
46 return (count>0)?count:0;