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/*
Copyright (C) 2010 Paul Davis
Author: Torben Hohn
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; either version 2 of the License, or
(at your option) any later version.
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifdef WAF_BUILD
#include "libpbd-config.h"
#endif
#ifdef __linux__
#include <unistd.h>
#elif defined(__APPLE__) || defined(__FreeBSD__)
#include <sys/stddef.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#endif
#include "pbd/cpus.h"
uint32_t
hardware_concurrency()
{
#if defined(PTW32_VERSION) || defined(__hpux)
return pthread_num_processors_np();
#elif defined(__APPLE__) || defined(__FreeBSD__)
int count;
size_t size=sizeof(count);
return sysctlbyname("hw.ncpu",&count,&size,NULL,0)?0:count;
#elif defined(HAVE_UNISTD) && defined(_SC_NPROCESSORS_ONLN)
int const count=sysconf(_SC_NPROCESSORS_ONLN);
return (count>0)?count:0;
#else
return 0;
#endif
}
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