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/*
$Header: /cvs/src/chrony/wrap_adjtimex.c,v 1.4 2000/08/08 21:37:24 richard Exp $
=======================================================================
chronyd/chronyc - Programs for keeping computer clocks accurate.
Copyright (C) 1997-1999 Richard P. Curnow
All rights reserved.
For conditions of use, refer to the file LICENCE.
=======================================================================
This is a wrapper around the Linux adjtimex system call. It isolates the
inclusion of <linux/adjtimex.h> from the need to include other header files,
many of which conflict with those in <linux/...> on some recent distributions
(as of Jul 2000) using kernels around 2.2.16 onwards.
*/
#ifdef LINUX
#define _LOOSE_KERNEL_NAMES
#include <linux/time.h>
#include <linux/timex.h>
#include "wrap_adjtimex.h"
/* This doesn't seem to be in any include files !! */
extern int adjtimex(struct timex *);
int
TMX_SetTick(long tick)
{
struct timex txc;
txc.modes = ADJ_TICK;
txc.tick = tick;
return adjtimex(&txc);
}
int
TMX_ApplyOffset(long *offset)
{
struct timex txc;
int result;
txc.modes = ADJ_OFFSET_SINGLESHOT;
txc.offset = *offset;
result = adjtimex(&txc);
*offset = txc.offset;
return result;
}
int
TMX_SetFrequency(double freq, long tick)
{
struct timex txc;
txc.modes = ADJ_TICK | ADJ_FREQUENCY | ADJ_STATUS;
txc.freq = (long)(freq * (double)(1 << SHIFT_USEC));
txc.tick = tick;
txc.status = STA_UNSYNC; /* Prevent any of the FLL/PLL stuff coming
up */
return adjtimex(&txc);
}
int
TMX_GetFrequency(double *freq)
{
struct timex txc;
int result;
txc.modes = 0; /* pure read */
result = adjtimex(&txc);
*freq = txc.freq / (double)(1 << SHIFT_USEC);
return result;
}
int
TMX_GetOffsetLeft(long *offset)
{
struct timex txc;
int result;
txc.modes = 0; /* pure read */
result = adjtimex(&txc);
*offset = txc.offset;
return result;
}
#endif
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