/* $NetBSD: os.c,v 1.2.4.2 2024/02/29 12:35:02 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 #include #include #include #include #include "os_p.h" static unsigned int isc__os_ncpus = 0; static unsigned long isc__os_cacheline = ISC_OS_CACHELINE_SIZE; static mode_t isc__os_umask = 0; #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) */ static void ncpus_initialize(void) { #if defined(HAVE_SYSCONF) isc__os_ncpus = sysconf_ncpus(); #endif /* if defined(HAVE_SYSCONF) */ #if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME) if (isc__os_ncpus <= 0) { isc__os_ncpus = sysctl_ncpus(); } #endif /* if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME) */ if (isc__os_ncpus == 0) { isc__os_ncpus = 1; } } static void umask_initialize(void) { isc__os_umask = umask(0); (void)umask(isc__os_umask); } unsigned int isc_os_ncpus(void) { return (isc__os_ncpus); } unsigned long isc_os_cacheline(void) { return (isc__os_cacheline); } mode_t isc_os_umask(void) { return (isc__os_umask); } void isc__os_initialize(void) { umask_initialize(); ncpus_initialize(); #if defined(HAVE_SYSCONF) && defined(_SC_LEVEL1_DCACHE_LINESIZE) long s = sysconf(_SC_LEVEL1_DCACHE_LINESIZE); if (s > 0 && (unsigned long)s > isc__os_cacheline) { isc__os_cacheline = s; } #endif } void isc__os_shutdown(void) { /* empty, but defined for completeness */; }