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5535384878
Modify the HCL_ProcessReadings() function to try to always provide a valid sample. Instead of dropping a sample outside of the expected delay, provide its assumed quality level as a small integer (relative to already accumulated samples), and let the caller decide what quality is acceptable.
59 lines
2.4 KiB
C
59 lines
2.4 KiB
C
/*
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chronyd/chronyc - Programs for keeping computer clocks accurate.
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**********************************************************************
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* Copyright (C) Miroslav Lichvar 2016
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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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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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**********************************************************************
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=======================================================================
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Header for tracking of hardware clocks */
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#ifndef GOT_HWCLOCK_H
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#define GOT_HWCLOCK_H
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typedef struct HCL_Instance_Record *HCL_Instance;
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/* Create a new HW clock instance */
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extern HCL_Instance HCL_CreateInstance(int min_samples, int max_samples,
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double min_separation, double precision);
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/* Destroy a HW clock instance */
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extern void HCL_DestroyInstance(HCL_Instance clock);
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/* Check if a new sample should be accumulated at this time */
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extern int HCL_NeedsNewSample(HCL_Instance clock, struct timespec *now);
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/* Process new readings of the HW clock in the form of (sys, hw, sys) triplets
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and produce a sample which can be accumulated by HCL_AccumulateSample().
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Indicate the quality of the sample relative to already processed samples as
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a value of 0, 1, or 2, where a sample of quality 0 should normally be
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dropped. */
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extern int HCL_ProcessReadings(HCL_Instance clock, int n_readings, struct timespec tss[][3],
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struct timespec *hw_ts, struct timespec *local_ts, double *err,
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int *quality);
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/* Accumulate a new sample */
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extern void HCL_AccumulateSample(HCL_Instance clock, struct timespec *hw_ts,
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struct timespec *local_ts, double err);
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/* Convert raw hardware time to cooked local time */
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extern int HCL_CookTime(HCL_Instance clock, struct timespec *raw, struct timespec *cooked,
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double *err);
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#endif
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