/* $NetBSD: os.c,v 1.1.4.2 2024/02/29 11:39:11 martin Exp $ */ /* * Copyright (C) Internet Systems Consortium, Inc. ("ISC") * * SPDX-License-Identifier: MPL-2.0 * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, you can obtain one at https://mozilla.org/MPL/2.0/. * * See the COPYRIGHT file distributed with this work for additional * information regarding copyright ownership. */ #include #ifdef HAVE_SYSCONF #include static 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 /* if defined(_SC_NPROCESSORS_ONLN) */ return (0); #endif /* if defined(_SC_NPROCESSORS_ONLN) */ } #endif /* HAVE_SYSCONF */ #if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME) #include /* for NetBSD */ #include #include /* for FreeBSD */ 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 /* if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME) */ unsigned int isc_os_ncpus(void) { long ncpus = 0; #if defined(HAVE_SYSCONF) ncpus = sysconf_ncpus(); #endif /* if defined(HAVE_SYSCONF) */ #if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME) if (ncpus <= 0) { ncpus = sysctl_ncpus(); } #endif /* if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME) */ if (ncpus <= 0) { ncpus = 1; } return ((unsigned int)ncpus); }