1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #pragma once 30 31 /** 32 * @file sys/timex.h 33 * @brief Kernel clock tuning. 34 */ 35 36 #include <sys/cdefs.h> 37 #include <sys/types.h> 38 #include <linux/timex.h> 39 40 __BEGIN_DECLS 41 42 /** 43 * [adjtimex(2)](http://man7.org/linux/man-pages/man2/adjtimex.2.html) adjusts the kernel clock. 44 * 45 * Returns the clock state on success, and returns -1 and sets `errno` on failure. 46 * 47 * Available since API level 24. 48 */ 49 int adjtimex(struct timex* __buf) __INTRODUCED_IN(24); 50 51 /** 52 * clock_adjtime adjusts a specific kernel clock. 53 * 54 * Returns 0 on success, and returns -1 and sets `errno` on failure. 55 * 56 * Available since API level 24. 57 */ 58 int clock_adjtime(clockid_t __clock, struct timex* __tx) __INTRODUCED_IN(24); 59 60 __END_DECLS 61