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/*
* Copyright (C) 2010-2013 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2013-2019 Robin Gareus <robin@gareus.org>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef WAF_BUILD
#include "libpbd-config.h"
#endif
#include <stdlib.h>
#ifdef __linux__
#include <unistd.h>
#elif defined(__APPLE__) || defined(__FreeBSD__)
#include <stddef.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#elif defined(PLATFORM_WINDOWS)
#include <windows.h>
#endif
#include "pbd/cpus.h"
#if defined(COMPILER_MSVC) && !defined(PTW32_VERSION)
#include <ardourext/pthread.h> // Gets us 'PTW32_VERSION'
#endif
uint32_t
hardware_concurrency()
{
if (getenv("ARDOUR_CONCURRENCY")) {
int c = atoi (getenv("ARDOUR_CONCURRENCY"));
if (c > 0) {
return c;
}
}
#if defined(PTW32_VERSION) || defined(__hpux)
return pthread_num_processors_np();
#elif defined(__APPLE__)
int count;
size_t size=sizeof(count);
# ifdef MIXBUS
return sysctlbyname("hw.logicalcpu",&count,&size,NULL,0)?0:count;
# else
return sysctlbyname("hw.physicalcpu",&count,&size,NULL,0)?0:count;
# endif
#elif 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;
#elif defined(PLATFORM_WINDOWS)
SYSTEM_INFO sys_info;
GetSystemInfo( &sys_info );
return sys_info.dwNumberOfProcessors;
#else
return 0;
#endif
}
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