48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
/**
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* @file clockadj.h
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* @brief Wraps clock_adjtime functionality.
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* @note Copyright (C) 2013 Miroslav Lichvar <mlichvar@redhat.com>
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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 the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU 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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#ifndef HAVE_CLOCKADJ_H
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#define HAVE_CLOCKADJ_H
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#include <inttypes.h>
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#include <time.h>
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/*
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* Set clock's frequency offset.
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* @param clkid A clock ID obtained using phc_open() or CLOCK_REALTIME.
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* @param freq The frequency offset in parts per billion (ppb).
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*/
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void clockadj_set_freq(clockid_t clkid, double freq);
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/*
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* Read clock's frequency offset.
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* @param clkid A clock ID obtained using phc_open() or CLOCK_REALTIME.
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* @return The frequency offset in parts per billion (ppb).
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*/
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double clockadj_get_freq(clockid_t clkid);
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/*
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* Step clock's time.
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* @param clkid A clock ID obtained using phc_open() or CLOCK_REALTIME.
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* @param step The time step in nanoseconds.
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*/
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void clockadj_step(clockid_t clkid, int64_t step);
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#endif
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