/* * Copyright (c) 2003 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ #include <sys/types.h> #include <sys/sysctl.h> #include <stdbool.h> static int osi_oid[2] = {-1, 0}; bool OSSystemInfo(int selector, unsigned long long *resultp) { int oid[3]; size_t size; /* * Check cached OID, look it up if we haven't already. * * NB. Whilst this isn't strictly thread safe, since the * result as written by any thread will be the same * there is no actual risk of corruption. */ if (osi_oid[0] == -1) { size = 2; if (sysctlnametomib("hw.systeminfo", &osi_oid, &size) || (size != 2)) return(false); } /* build OID */ oid[0] = osi_oid[0]; oid[1] = osi_oid[1]; oid[2] = selector; /* make the call */ size = sizeof(*resultp); if (sysctl(oid, 3, resultp, &size, NULL, 0) || (size != sizeof(*resultp))) return(false); return(true); }