09b7f77f9a
Move processing of PHC readings from sys_linux to hwclock, where statistics can be collected and filtering improved. In the PHC refclock driver accumulate the samples even if not in the external timestamping mode to update the context which will be needed for improved filtering.
54 lines
2.2 KiB
C
54 lines
2.2 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 form of (sys, hw, sys) triplets and
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produce a sample which can be accumulated */
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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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/* 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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