148 lines
4 KiB
C
148 lines
4 KiB
C
/*
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$Header: /cvs/src/chrony/wrap_adjtimex.c,v 1.9 2002/11/19 21:33:42 richard Exp $
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=======================================================================
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chronyd/chronyc - Programs for keeping computer clocks accurate.
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**********************************************************************
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* Copyright (C) Richard P. Curnow 1997-2002
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* 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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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*
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**********************************************************************
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=======================================================================
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This is a wrapper around the Linux adjtimex system call. It isolates the
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inclusion of <linux/adjtimex.h> from the need to include other header files,
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many of which conflict with those in <linux/...> on some recent distributions
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(as of Jul 2000) using kernels around 2.2.16 onwards.
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*/
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#ifdef LINUX
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#define _LOOSE_KERNEL_NAMES
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#include "chrony_timex.h"
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#include "wrap_adjtimex.h"
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int
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TMX_SetTick(long tick)
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{
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struct timex txc;
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txc.modes = ADJ_TICK;
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txc.tick = tick;
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return adjtimex(&txc);
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}
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int
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TMX_ApplyOffset(long *offset)
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{
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struct timex txc;
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int result;
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txc.modes = ADJ_OFFSET_SINGLESHOT;
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txc.offset = *offset;
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result = adjtimex(&txc);
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*offset = txc.offset;
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return result;
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}
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int
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TMX_SetFrequency(double freq, long tick)
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{
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struct timex txc;
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txc.modes = ADJ_TICK | ADJ_FREQUENCY | ADJ_STATUS;
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txc.freq = (long)(freq * (double)(1 << SHIFT_USEC));
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txc.tick = tick;
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txc.status = STA_UNSYNC; /* Prevent any of the FLL/PLL stuff coming
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up */
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return adjtimex(&txc);
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}
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int
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TMX_GetFrequency(double *freq)
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{
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struct timex txc;
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int result;
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txc.modes = 0; /* pure read */
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result = adjtimex(&txc);
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*freq = txc.freq / (double)(1 << SHIFT_USEC);
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return result;
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}
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int
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TMX_GetOffsetLeft(long *offset)
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{
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struct timex txc;
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int result;
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txc.modes = 0; /* pure read */
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result = adjtimex(&txc);
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*offset = txc.offset;
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return result;
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}
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int
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TMX_ReadCurrentParams(struct tmx_params *params)
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{
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struct timex txc;
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int result;
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txc.modes = 0; /* pure read */
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result = adjtimex(&txc);
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params->tick = txc.tick;
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params->offset = txc.offset;
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params->freq = txc.freq;
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params->dfreq = txc.freq / (double)(1 << SHIFT_USEC);
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params->maxerror = txc.maxerror;
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params->esterror = txc.esterror;
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params->sta_pll = (txc.status & STA_PLL);
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params->sta_ppsfreq = (txc.status & STA_PPSFREQ);
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params->sta_ppstime = (txc.status & STA_PPSTIME);
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params->sta_fll = (txc.status & STA_FLL);
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params->sta_ins = (txc.status & STA_INS);
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params->sta_del = (txc.status & STA_DEL);
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params->sta_unsync = (txc.status & STA_UNSYNC);
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params->sta_freqhold = (txc.status & STA_FREQHOLD);
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params->sta_ppssignal = (txc.status & STA_PPSSIGNAL);
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params->sta_ppsjitter = (txc.status & STA_PPSJITTER);
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params->sta_ppswander = (txc.status & STA_PPSWANDER);
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params->sta_ppserror = (txc.status & STA_PPSERROR);
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params->sta_clockerr = (txc.status & STA_CLOCKERR);
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params->constant = txc.constant;
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params->precision = txc.precision;
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params->tolerance = txc.tolerance;
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params->ppsfreq = txc.ppsfreq;
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params->jitter = txc.jitter;
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params->shift = txc.shift;
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params->stabil = txc.stabil;
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params->jitcnt = txc.jitcnt;
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params->calcnt = txc.calcnt;
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params->errcnt = txc.errcnt;
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params->stbcnt = txc.stbcnt;
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return result;
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}
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#endif
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