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// https://bitbucket.org/wolfpld/etcpak

// Bartosz Taudul <wolf.pld@gmail.com>

#ifdef _WIN32

# include <windows.h>

#else

# include <pthread.h>

# include <unistd.h>

#endif

#include "System.hpp"

int System::CPUCores()

{

static int cores = 0;

if (cores == 0)

{

#ifdef _WIN32

SYSTEM_INFO info;

GetSystemInfo(&info);

cores = (int)info.dwNumberOfProcessors;

#else

# ifndef _SC_NPROCESSORS_ONLN

# ifdef _SC_NPROC_ONLN

# define _SC_NPROCESSORS_ONLN _SC_NPROC_ONLN

# elif defined _SC_CRAY_NCPU

# define _SC_NPROCESSORS_ONLN _SC_CRAY_NCPU

# endif

# endif

cores = (int)(long)sysconf( _SC_NPROCESSORS_ONLN );

#endif

if (cores <= 0)

{

cores = 1;

}

}

return cores;

}