1*19c3b8c2SApple OSS Distributions /* 2*19c3b8c2SApple OSS Distributions * Copyright (c) 2008 Apple Inc. All rights reserved. 3*19c3b8c2SApple OSS Distributions * 4*19c3b8c2SApple OSS Distributions * @APPLE_LICENSE_HEADER_START@ 5*19c3b8c2SApple OSS Distributions * 6*19c3b8c2SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*19c3b8c2SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*19c3b8c2SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*19c3b8c2SApple OSS Distributions * compliance with the License. Please obtain a copy of the License at 10*19c3b8c2SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this 11*19c3b8c2SApple OSS Distributions * file. 12*19c3b8c2SApple OSS Distributions * 13*19c3b8c2SApple OSS Distributions * The Original Code and all software distributed under the License are 14*19c3b8c2SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15*19c3b8c2SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16*19c3b8c2SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17*19c3b8c2SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 18*19c3b8c2SApple OSS Distributions * Please see the License for the specific language governing rights and 19*19c3b8c2SApple OSS Distributions * limitations under the License. 20*19c3b8c2SApple OSS Distributions * 21*19c3b8c2SApple OSS Distributions * @APPLE_LICENSE_HEADER_END@ 22*19c3b8c2SApple OSS Distributions */ 23*19c3b8c2SApple OSS Distributions #include <sys/types.h> 24*19c3b8c2SApple OSS Distributions #include <machine/cpu_capabilities.h> 25*19c3b8c2SApple OSS Distributions 26*19c3b8c2SApple OSS Distributions extern uint64_t mach_absolute_time(void); 27*19c3b8c2SApple OSS Distributions 28*19c3b8c2SApple OSS Distributions #if defined(__arm64__) || defined(__x86_64__) 29*19c3b8c2SApple OSS Distributions 30*19c3b8c2SApple OSS Distributions uint64_t mach_approximate_time(void)31*19c3b8c2SApple OSS Distributionsmach_approximate_time(void) 32*19c3b8c2SApple OSS Distributions { 33*19c3b8c2SApple OSS Distributions if (COMM_PAGE_READ(uint8_t, APPROX_TIME_SUPPORTED)) { 34*19c3b8c2SApple OSS Distributions return COMM_PAGE_READ(uint64_t, APPROX_TIME); 35*19c3b8c2SApple OSS Distributions } 36*19c3b8c2SApple OSS Distributions return mach_absolute_time(); 37*19c3b8c2SApple OSS Distributions } 38*19c3b8c2SApple OSS Distributions 39*19c3b8c2SApple OSS Distributions #endif 40