/* $NetBSD: os.c,v 1.6 2020/05/25 20:47:23 christos Exp $ */ /* * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC") * Copyright (C) 2000, 2001 Internet Software Consortium. * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ /* Id: os.c,v 1.18 2007/06/19 23:47:18 tbox Exp */ #include <config.h> #include <isc/os.h> #ifdef HAVE_SYSCONF #include <unistd.h> #ifndef __hpux static inline long sysconf_ncpus(void) { #if defined(_SC_NPROCESSORS_ONLN) return sysconf((_SC_NPROCESSORS_ONLN)); #elif defined(_SC_NPROC_ONLN) return sysconf((_SC_NPROC_ONLN)); #else return (0); #endif } #endif #endif /* HAVE_SYSCONF */ #ifdef __hpux #include <sys/pstat.h> static inline int hpux_ncpus(void) { struct pst_dynamic psd; if (pstat_getdynamic(&psd, sizeof(psd), 1, 0) != -1) return (psd.psd_proc_cnt); else return (0); } #endif /* __hpux */ #if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME) #include <sys/types.h> /* for FreeBSD */ #include <sys/param.h> /* for NetBSD */ #include <sys/sysctl.h> static int sysctl_ncpus(void) { int ncpu, result; size_t len; len = sizeof(ncpu); result = sysctlbyname("hw.ncpu", &ncpu, &len , 0, 0); if (result != -1) return (ncpu); return (0); } #endif unsigned int isc_os_ncpus(void) { long ncpus = 0; #ifdef __hpux ncpus = hpux_ncpus(); #elif defined(HAVE_SYSCONF) ncpus = sysconf_ncpus(); #endif #if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME) if (ncpus <= 0) ncpus = sysctl_ncpus(); #endif if (ncpus <= 0) ncpus = 1; return ((unsigned int)ncpus); } |