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eb4157390c
The ntp_gettime implementation of NTP exports the tai field the kernel now produces. This requires an ABI change since the ntptimeval structure changed. Upstream kept the same name, there is nothing to do. This patch changes the ntptimeval structure but keeps the old ntp_gettime definition. A new ntp_gettimex function which is transparently invoked through the old name is introduced. This has the advantage that even object files can remain compatible. This wouldn't be the case if symbol versioning would be used to overload the name ntp_gettime.
155 lines
5.5 KiB
C
155 lines
5.5 KiB
C
/* Copyright (C) 1995-1997, 1999, 2007, 2009 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 _SYS_TIMEX_H
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#define _SYS_TIMEX_H 1
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#include <features.h>
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#include <sys/time.h>
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/* These definitions from linux/timex.h as of 2.6.30. */
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#define NTP_API 4 /* NTP API version */
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struct ntptimeval
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{
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struct timeval time; /* current time (ro) */
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long int maxerror; /* maximum error (us) (ro) */
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long int esterror; /* estimated error (us) (ro) */
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long int tai; /* TAI offset (ro) */
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long int __unused1;
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long int __unused2;
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long int __unused3;
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long int __unused4;
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};
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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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/* Clock states (time_state) */
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#define TIME_OK 0 /* clock synchronized, no leap second */
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#define TIME_INS 1 /* insert leap second */
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#define TIME_DEL 2 /* delete leap second */
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#define TIME_OOP 3 /* leap second in progress */
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#define TIME_WAIT 4 /* leap second has occurred */
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#define TIME_ERROR 5 /* clock not synchronized */
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#define TIME_BAD TIME_ERROR /* bw compat */
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/* Maximum time constant of the PLL. */
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#define MAXTC 6
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__BEGIN_DECLS
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extern int __adjtimex (struct timex *__ntx) __THROW;
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extern int adjtimex (struct timex *__ntx) __THROW;
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#if defined __GNUC__ && __GNUC__ >= 2
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extern int ntp_gettime (struct ntptimeval *__ntv)
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__asm__ ("ntp_gettimex") __THROW;
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#else
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extern int ntp_gettimex (struct ntptimeval *__ntv) __THROW;
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# define ntp_gettime ntp_gettimex
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#endif
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extern int ntp_adjtime (struct timex *__tntx) __THROW;
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__END_DECLS
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#endif /* sys/timex.h */
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