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Add clock_adjtime syscall.
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Ulrich Drepper
93
sysdeps/unix/sysv/linux/bits/time.h
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93
sysdeps/unix/sysv/linux/bits/time.h
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/* System-dependent timing definitions. Linux version.
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Copyright (C) 1996,1997,1999-2003,2010,2011 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/*
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* Never include this file directly; use <time.h> instead.
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*/
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#if defined __need_timeval || defined __USE_GNU
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# ifndef _STRUCT_TIMEVAL
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# define _STRUCT_TIMEVAL 1
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# include <bits/types.h>
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/* A time value that is accurate to the nearest
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microsecond but also has a range of years. */
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struct timeval
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{
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__time_t tv_sec; /* Seconds. */
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__suseconds_t tv_usec; /* Microseconds. */
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};
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# endif /* struct timeval */
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#endif
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#ifndef __need_timeval
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# ifndef _BITS_TIME_H
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# define _BITS_TIME_H 1
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/* ISO/IEC 9899:1990 7.12.1: <time.h>
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The macro `CLOCKS_PER_SEC' is the number per second of the value
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returned by the `clock' function. */
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/* CAE XSH, Issue 4, Version 2: <time.h>
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The value of CLOCKS_PER_SEC is required to be 1 million on all
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XSI-conformant systems. */
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# define CLOCKS_PER_SEC 1000000l
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# if !defined __STRICT_ANSI__ && !defined __USE_XOPEN2K
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/* Even though CLOCKS_PER_SEC has such a strange value CLK_TCK
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presents the real value for clock ticks per second for the system. */
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# include <bits/types.h>
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extern long int __sysconf (int);
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# define CLK_TCK ((__clock_t) __sysconf (2)) /* 2 is _SC_CLK_TCK */
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# endif
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# ifdef __USE_POSIX199309
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/* Identifier for system-wide realtime clock. */
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# define CLOCK_REALTIME 0
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/* Monotonic system-wide clock. */
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# define CLOCK_MONOTONIC 1
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/* High-resolution timer from the CPU. */
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# define CLOCK_PROCESS_CPUTIME_ID 2
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/* Thread-specific CPU-time clock. */
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# define CLOCK_THREAD_CPUTIME_ID 3
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/* Monotonic system-wide clock, not adjusted for frequency scaling. */
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# define CLOCK_MONOTONIC_RAW 4
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/* Identifier for system-wide realtime clock, updated only on ticks. */
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# define CLOCK_REALTIME_COARSE 5
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/* Monotonic system-wide clock, updated only on ticks. */
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# define CLOCK_MONOTONIC_COARSE 6
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/* Flag to indicate time is absolute. */
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# define TIMER_ABSTIME 1
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# endif
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# ifdef __USE_GNU
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# include <bits/timex.h>
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__BEGIN_DECLS
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/* Tune a POSIX clock. */
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extern int clock_adjtime (__clockid_t __clock_id, struct timex *__utx) __THROW;
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__END_DECLS
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# endif /* use GNU */
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# endif /* bits/time.h */
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#endif
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#undef __need_timeval
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108
sysdeps/unix/sysv/linux/bits/timex.h
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108
sysdeps/unix/sysv/linux/bits/timex.h
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/* Copyright (C) 1995-1997,1999,2007,2009,2011 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _BITS_TIMEX_H
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#define _BITS_TIMEX_H 1
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/* These definitions from linux/timex.h as of 2.6.30. */
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struct timex
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{
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unsigned int modes; /* mode selector */
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long int offset; /* time offset (usec) */
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long int freq; /* frequency offset (scaled ppm) */
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long int maxerror; /* maximum error (usec) */
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long int esterror; /* estimated error (usec) */
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int status; /* clock command/status */
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long int constant; /* pll time constant */
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long int precision; /* clock precision (usec) (read only) */
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long int tolerance; /* clock frequency tolerance (ppm) (read only) */
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struct timeval time; /* (read only) */
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long int tick; /* (modified) usecs between clock ticks */
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long int ppsfreq; /* pps frequency (scaled ppm) (ro) */
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long int jitter; /* pps jitter (us) (ro) */
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int shift; /* interval duration (s) (shift) (ro) */
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long int stabil; /* pps stability (scaled ppm) (ro) */
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long int jitcnt; /* jitter limit exceeded (ro) */
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long int calcnt; /* calibration intervals (ro) */
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long int errcnt; /* calibration errors (ro) */
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long int stbcnt; /* stability limit exceeded (ro) */
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int tai; /* TAI offset (ro) */
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/* ??? */
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int :32; int :32; int :32; int :32;
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int :32; int :32; int :32; int :32;
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int :32; int :32; int :32;
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};
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/* Mode codes (timex.mode) */
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#define ADJ_OFFSET 0x0001 /* time offset */
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#define ADJ_FREQUENCY 0x0002 /* frequency offset */
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#define ADJ_MAXERROR 0x0004 /* maximum time error */
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#define ADJ_ESTERROR 0x0008 /* estimated time error */
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#define ADJ_STATUS 0x0010 /* clock status */
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#define ADJ_TIMECONST 0x0020 /* pll time constant */
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#define ADJ_TAI 0x0080 /* set TAI offset */
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#define ADJ_MICRO 0x1000 /* select microsecond resolution */
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#define ADJ_NANO 0x2000 /* select nanosecond resolution */
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#define ADJ_TICK 0x4000 /* tick value */
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#define ADJ_OFFSET_SINGLESHOT 0x8001 /* old-fashioned adjtime */
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#define ADJ_OFFSET_SS_READ 0xa001 /* read-only adjtime */
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/* xntp 3.4 compatibility names */
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#define MOD_OFFSET ADJ_OFFSET
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#define MOD_FREQUENCY ADJ_FREQUENCY
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#define MOD_MAXERROR ADJ_MAXERROR
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#define MOD_ESTERROR ADJ_ESTERROR
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#define MOD_STATUS ADJ_STATUS
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#define MOD_TIMECONST ADJ_TIMECONST
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#define MOD_CLKB ADJ_TICK
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#define MOD_CLKA ADJ_OFFSET_SINGLESHOT /* 0x8000 in original */
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#define MOD_TAI ADJ_TAI
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#define MOD_MICRO ADJ_MICRO
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#define MOD_NANO ADJ_NANO
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/* Status codes (timex.status) */
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#define STA_PLL 0x0001 /* enable PLL updates (rw) */
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#define STA_PPSFREQ 0x0002 /* enable PPS freq discipline (rw) */
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#define STA_PPSTIME 0x0004 /* enable PPS time discipline (rw) */
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#define STA_FLL 0x0008 /* select frequency-lock mode (rw) */
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#define STA_INS 0x0010 /* insert leap (rw) */
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#define STA_DEL 0x0020 /* delete leap (rw) */
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#define STA_UNSYNC 0x0040 /* clock unsynchronized (rw) */
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#define STA_FREQHOLD 0x0080 /* hold frequency (rw) */
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#define STA_PPSSIGNAL 0x0100 /* PPS signal present (ro) */
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#define STA_PPSJITTER 0x0200 /* PPS signal jitter exceeded (ro) */
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#define STA_PPSWANDER 0x0400 /* PPS signal wander exceeded (ro) */
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#define STA_PPSERROR 0x0800 /* PPS signal calibration error (ro) */
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#define STA_CLOCKERR 0x1000 /* clock hardware fault (ro) */
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#define STA_NANO 0x2000 /* resolution (0 = us, 1 = ns) (ro) */
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#define STA_MODE 0x4000 /* mode (0 = PLL, 1 = FLL) (ro) */
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#define STA_CLK 0x8000 /* clock source (0 = A, 1 = B) (ro) */
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/* Read-only bits */
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#define STA_RONLY (STA_PPSSIGNAL | STA_PPSJITTER | STA_PPSWANDER | \
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STA_PPSERROR | STA_CLOCKERR | STA_NANO | STA_MODE | STA_CLK)
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#endif /* bits/timex.h */
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