50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
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/*
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Copyright (C) 2010 Paul Davis
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Author: Torben Hohn
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifdef WAF_BUILD
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#include "libpbd-config.h"
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#endif
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#ifdef __linux__
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#include <unistd.h>
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#elif defined(__APPLE__) || defined(__FreeBSD__)
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#endif
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#include "pbd/cpus.h"
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uint32_t
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hardware_concurrency()
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{
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#if defined(PTW32_VERSION) || defined(__hpux)
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return pthread_num_processors_np();
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#elif defined(__APPLE__) || defined(__FreeBSD__)
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int count;
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size_t size=sizeof(count);
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return sysctlbyname("hw.ncpu",&count,&size,NULL,0)?0:count;
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#elif defined(HAVE_UNISTD) && defined(_SC_NPROCESSORS_ONLN)
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int const count=sysconf(_SC_NPROCESSORS_ONLN);
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return (count>0)?count:0;
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#else
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return 0;
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#endif
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}
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