1207753Smm/////////////////////////////////////////////////////////////////////////////// 2207753Smm// 3207753Smm/// \file tuklib_cpucores.c 4207753Smm/// \brief Get the number of CPU cores online 5207753Smm// 6207753Smm// Author: Lasse Collin 7207753Smm// 8207753Smm// This file has been put into the public domain. 9207753Smm// You can do whatever you want with this file. 10207753Smm// 11207753Smm/////////////////////////////////////////////////////////////////////////////// 12207753Smm 13207753Smm#include "tuklib_cpucores.h" 14207753Smm 15207753Smm#if defined(TUKLIB_CPUCORES_SYSCTL) 16207753Smm# ifdef HAVE_SYS_PARAM_H 17207753Smm# include <sys/param.h> 18207753Smm# endif 19207753Smm# include <sys/sysctl.h> 20207753Smm 21207753Smm#elif defined(TUKLIB_CPUCORES_SYSCONF) 22207753Smm# include <unistd.h> 23213700Smm 24213700Smm// HP-UX 25213700Smm#elif defined(TUKLIB_CPUCORES_PSTAT_GETDYNAMIC) 26213700Smm# include <sys/param.h> 27213700Smm# include <sys/pstat.h> 28207753Smm#endif 29207753Smm 30207753Smm 31207753Smmextern uint32_t 32207753Smmtuklib_cpucores(void) 33207753Smm{ 34207753Smm uint32_t ret = 0; 35207753Smm 36207753Smm#if defined(TUKLIB_CPUCORES_SYSCTL) 37207753Smm int name[2] = { CTL_HW, HW_NCPU }; 38207753Smm int cpus; 39207753Smm size_t cpus_size = sizeof(cpus); 40207753Smm if (sysctl(name, 2, &cpus, &cpus_size, NULL, 0) != -1 41207753Smm && cpus_size == sizeof(cpus) && cpus > 0) 42213700Smm ret = cpus; 43207753Smm 44207753Smm#elif defined(TUKLIB_CPUCORES_SYSCONF) 45207753Smm# ifdef _SC_NPROCESSORS_ONLN 46207753Smm // Most systems 47207753Smm const long cpus = sysconf(_SC_NPROCESSORS_ONLN); 48207753Smm# else 49207753Smm // IRIX 50207753Smm const long cpus = sysconf(_SC_NPROC_ONLN); 51207753Smm# endif 52207753Smm if (cpus > 0) 53213700Smm ret = cpus; 54213700Smm 55213700Smm#elif defined(TUKLIB_CPUCORES_PSTAT_GETDYNAMIC) 56213700Smm struct pst_dynamic pst; 57213700Smm if (pstat_getdynamic(&pst, sizeof(pst), 1, 0) != -1) 58213700Smm ret = pst.psd_proc_cnt; 59207753Smm#endif 60207753Smm 61207753Smm return ret; 62207753Smm} 63