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Update ntp_gettime for Linux.

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The ntp_gettime implementation of NTP exports the tai field the kernel
now produces.  This requires an ABI change since the ntptimeval structure
changed.  Upstream kept the same name, there is nothing to do.  This
patch changes the ntptimeval structure but keeps the old ntp_gettime
definition.  A new ntp_gettimex function which is transparently invoked
through the old name is introduced.  This has the advantage that even
object files can remain compatible.  This wouldn't be the case if
symbol versioning would be used to overload the name ntp_gettime.
This commit is contained in:
Ulrich Drepper
2009-11-22 11:07:04 -08:00
parent 89b432d7a5
commit eb4157390c
6 changed files with 79 additions and 7 deletions
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16
sysdeps/unix/sysv/linux/sys/timex.h
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@ -24,11 +24,19 @@
/* These definitions from linux/timex.h as of 2.6.30. */
#define NTP_API 4 /* NTP API version */
struct ntptimeval
{
struct timeval time; /* current time (ro) */
long int maxerror; /* maximum error (us) (ro) */
long int esterror; /* estimated error (us) (ro) */
long int tai; /* TAI offset (ro) */
long int __unused1;
long int __unused2;
long int __unused3;
long int __unused4;
};
struct timex
@ -132,7 +140,13 @@ __BEGIN_DECLS
extern int __adjtimex (struct timex *__ntx) __THROW;
extern int adjtimex (struct timex *__ntx) __THROW;
extern int ntp_gettime (struct ntptimeval *__ntv) __THROW;
#if defined __GNUC__ && __GNUC__ >= 2
extern int ntp_gettime (struct ntptimeval *__ntv)
__asm__ ("ntp_gettimex") __THROW;
#else
extern int ntp_gettimex (struct ntptimeval *__ntv) __THROW;
# define ntp_gettime ntp_gettimex
#endif
extern int ntp_adjtime (struct timex *__tntx) __THROW;
__END_DECLS