1 /* $NetBSD: meminfo.c,v 1.1 2024/02/18 20:57:57 christos Exp $ */ 2 3 /* 4 * Copyright (C) Internet Systems Consortium, Inc. ("ISC") 5 * 6 * SPDX-License-Identifier: MPL-2.0 7 * 8 * This Source Code Form is subject to the terms of the Mozilla Public 9 * License, v. 2.0. If a copy of the MPL was not distributed with this 10 * file, you can obtain one at https://mozilla.org/MPL/2.0/. 11 * 12 * See the COPYRIGHT file distributed with this work for additional 13 * information regarding copyright ownership. 14 */ 15 16 #include <inttypes.h> 17 #include <unistd.h> 18 19 #include <isc/meminfo.h> 20 #if defined(HAVE_SYS_SYSCTL_H) && !defined(__linux__) 21 #include <sys/sysctl.h> 22 #endif /* if defined(HAVE_SYS_SYSCTL_H) && !defined(__linux__) */ 23 24 uint64_t isc_meminfo_totalphys(void)25isc_meminfo_totalphys(void) { 26 #if defined(CTL_HW) && (defined(HW_PHYSMEM64) || defined(HW_MEMSIZE)) 27 int mib[2]; 28 mib[0] = CTL_HW; 29 #if defined(HW_MEMSIZE) 30 mib[1] = HW_MEMSIZE; 31 #elif defined(HW_PHYSMEM64) 32 mib[1] = HW_PHYSMEM64; 33 #endif /* if defined(HW_MEMSIZE) */ 34 uint64_t size = 0; 35 size_t len = sizeof(size); 36 if (sysctl(mib, 2, &size, &len, NULL, 0) == 0) { 37 return (size); 38 } 39 #endif /* if defined(CTL_HW) && (defined(HW_PHYSMEM64) || defined(HW_MEMSIZE)) \ 40 * */ 41 #if defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE) 42 long pages = sysconf(_SC_PHYS_PAGES); 43 long pagesize = sysconf(_SC_PAGESIZE); 44 45 if (pages == -1 || pagesize == -1) { 46 return (0); 47 } 48 49 return ((size_t)pages * pagesize); 50 #endif /* if defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE) */ 51 return (0); 52 } 53