/contrib/ntp/include/ntp_syscall.h
C++ Header | 55 lines | 43 code | 8 blank | 4 comment | 2 complexity | cf5a15fb5666934569b01c94ba2f0d18 MD5 | raw file
Possible License(s): MPL-2.0-no-copyleft-exception, BSD-3-Clause, LGPL-2.0, LGPL-2.1, BSD-2-Clause, 0BSD, JSON, AGPL-1.0, GPL-2.0
1/* 2 * ntp_syscall.h - various ways to perform the ntp_adjtime() and ntp_gettime() 3 * system calls. 4 */ 5 6#ifndef NTP_SYSCALL_H 7#define NTP_SYSCALL_H 8 9#ifdef HAVE_CONFIG_H 10#include <config.h> 11#endif 12 13#ifdef HAVE_SYS_TIMEX_H 14# include <sys/timex.h> 15#endif 16 17#ifndef NTP_SYSCALLS_LIBC 18#ifdef NTP_SYSCALLS_STD 19# define ntp_adjtime(t) syscall(SYS_ntp_adjtime, (t)) 20# define ntp_gettime(t) syscall(SYS_ntp_gettime, (t)) 21#else /* !NTP_SYSCALLS_STD */ 22# ifdef HAVE___ADJTIMEX 23extern int __adjtimex P((struct timex *)); 24 25# define ntp_adjtime(t) __adjtimex((t)) 26 27static inline int 28ntp_gettime( 29 struct ntptimeval *ntv 30 ) 31{ 32 struct timex tntx; 33 int result; 34 35 tntx.modes = 0; 36 result = __adjtimex (&tntx); 37 ntv->time = tntx.time; 38 ntv->maxerror = tntx.maxerror; 39 ntv->esterror = tntx.esterror; 40#ifdef NTP_API 41# if NTP_API > 3 42 ntv->tai = tntx.tai; 43# endif 44#endif 45 return(result); 46} 47# else /* !HAVE__ADJTIMEX */ 48# ifdef HAVE___NTP_GETTIME 49# define ntp_gettime(t) __ntp_gettime((t)) 50# endif 51# endif /* !HAVE_ADJTIMEX */ 52#endif /* !NTP_SYSCALLS_STD */ 53#endif /* !NTP_SYSCALLS_LIBC */ 54 55#endif /* NTP_SYSCALL_H */