| | 1 | /* |
| | 2 | * Copyright (c) 2003 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. |
| | 7 | * |
| | 8 | * This file contains Original Code and/or Modifications of Original Code |
| | 9 | * as defined in and that are subject to the Apple Public Source License |
| | 10 | * Version 2.0 (the 'License'). You may not use this file except in |
| | 11 | * compliance with the License. Please obtain a copy of the License at |
| | 12 | * http://www.opensource.apple.com/apsl/ and read it before using this |
| | 13 | * file. |
| | 14 | * |
| | 15 | * The Original Code and all software distributed under the License are |
| | 16 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 17 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 18 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 19 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 20 | * Please see the License for the specific language governing rights and |
| | 21 | * limitations under the License. |
| | 22 | * |
| | 23 | * @APPLE_LICENSE_HEADER_END@ |
| | 24 | */ |
| | 25 | |
| | 26 | #include <sys/types.h> |
| | 27 | #include <sys/sysctl.h> |
| | 28 | #include <stdbool.h> |
| | 29 | |
| | 30 | static int osi_oid[2] = {-1, 0}; |
| | 31 | |
| | 32 | bool |
| | 33 | OSSystemInfo(int selector, unsigned long long *resultp) |
| | 34 | { |
| | 35 | int oid[3]; |
| | 36 | size_t size; |
| | 37 | |
| | 38 | /* |
| | 39 | * Check cached OID, look it up if we haven't already. |
| | 40 | * |
| | 41 | * NB. Whilst this isn't strictly thread safe, since the |
| | 42 | * result as written by any thread will be the same |
| | 43 | * there is no actual risk of corruption. |
| | 44 | */ |
| | 45 | if (osi_oid[0] == -1) { |
| | 46 | size = 2; |
| | 47 | if (sysctlnametomib("hw.systeminfo", &osi_oid, &size) || |
| | 48 | (size != 2)) |
| | 49 | return(false); |
| | 50 | } |
| | 51 | |
| | 52 | /* build OID */ |
| | 53 | oid[0] = osi_oid[0]; |
| | 54 | oid[1] = osi_oid[1]; |
| | 55 | oid[2] = selector; |
| | 56 | |
| | 57 | /* make the call */ |
| | 58 | size = sizeof(*resultp); |
| | 59 | if (sysctl(oid, 3, resultp, &size, NULL, 0) || |
| | 60 | (size != sizeof(*resultp))) |
| | 61 | return(false); |
| | 62 | |
| | 63 | return(true); |
| | 64 | } |
| | 65 | |
projects / apple / libc.git / blame_incremental