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/*
* ntp_syscall.h - various ways to perform the ntp_adjtime() system calls.
*
* On most systems including <sys/timex.h> will bring in declarations
* for the BSD function ntp_adjtime(2). (Linux using glibc has these,
* though they're not visible in the manual pages.)
*/
#ifndef GUARD_NTP_SYSCALL_H
#define GUARD_NTP_SYSCALL_H
# include <sys/time.h> /* prerequisite on NetBSD */
# include <sys/timex.h>
extern int ntp_adjtime_ns(struct timex *);
/*
* The units of the maxerror and esterror fields vary by platform. If
* STA_NANO is defined, they're in nanoseconds; otherwise in
* microseconds. Hide the difference by normalizing everything to
* float seconds.
*/
# ifdef STA_NANO
#define ntp_error_in_seconds(n) ((n)/1.0e9)
# else
#define ntp_error_in_seconds(n) ((n)/1.0e6)
# endif
/* MUSL port shim */
#if !defined(HAVE_NTP_ADJTIME) && defined(HAVE_ADJTIMEX)
#define ntp_adjtime adjtimex
#endif
#endif /* GUARD_NTP_SYSCALL_H */
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