| | 1 | /* |
| | 2 | * Copyright (c) 2008 Apple Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * This file contains Original Code and/or Modifications of Original Code |
| | 7 | * as defined in and that are subject to the Apple Public Source License |
| | 8 | * Version 2.0 (the 'License'). You may not use this file except in |
| | 9 | * compliance with the License. Please obtain a copy of the License at |
| | 10 | * http://www.opensource.apple.com/apsl/ and read it before using this |
| | 11 | * file. |
| | 12 | * |
| | 13 | * The Original Code and all software distributed under the License are |
| | 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 18 | * Please see the License for the specific language governing rights and |
| | 19 | * limitations under the License. |
| | 20 | * |
| | 21 | * @APPLE_LICENSE_HEADER_END@ |
| | 22 | */ |
| | 23 | #include <sys/types.h> |
| | 24 | #include <machine/cpu_capabilities.h> |
| | 25 | |
| | 26 | extern uint64_t mach_absolute_time(void); |
| | 27 | |
| | 28 | #if defined(__arm64__) || defined(__x86_64__) |
| | 29 | |
| | 30 | uint64_t mach_approximate_time(void) { |
| | 31 | uint8_t supported = *((uint8_t *)_COMM_PAGE_APPROX_TIME_SUPPORTED); |
| | 32 | if (supported) |
| | 33 | { |
| | 34 | return *((uint64_t *)_COMM_PAGE_APPROX_TIME); |
| | 35 | } |
| | 36 | return mach_absolute_time(); |
| | 37 | } |
| | 38 | |
| | 39 | #endif |
projects / apple / xnu.git / blame_incremental