mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-27 15:30:07 +00:00
119 lines
2.7 KiB
C
119 lines
2.7 KiB
C
/* Copyright (C) 1995, 1996, 1997, 1998, 2002, 2004, 2007, 2008
|
|
Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <sys/time.h>
|
|
#include <sys/timex.h>
|
|
|
|
#include <kernel-features.h>
|
|
|
|
#define MAX_SEC (INT_MAX / 1000000L - 2)
|
|
#define MIN_SEC (INT_MIN / 1000000L + 2)
|
|
|
|
#ifndef MOD_OFFSET
|
|
#define modes mode
|
|
#endif
|
|
|
|
#ifndef TIMEVAL
|
|
#define TIMEVAL timeval
|
|
#endif
|
|
|
|
#ifndef TIMEX
|
|
#define TIMEX timex
|
|
#endif
|
|
|
|
#ifndef ADJTIME
|
|
#define ADJTIME __adjtime
|
|
#endif
|
|
|
|
#ifndef ADJTIMEX
|
|
#define NO_LOCAL_ADJTIME
|
|
#define ADJTIMEX(x) INTUSE(__adjtimex) (x)
|
|
extern int INTUSE(__adjtimex) (struct timex *__ntx);
|
|
#endif
|
|
|
|
#ifndef LINKAGE
|
|
#define LINKAGE
|
|
#endif
|
|
|
|
LINKAGE int
|
|
ADJTIME (const struct TIMEVAL *itv, struct TIMEVAL *otv)
|
|
{
|
|
struct TIMEX tntx;
|
|
|
|
if (itv)
|
|
{
|
|
struct TIMEVAL tmp;
|
|
|
|
/* We will do some check here. */
|
|
tmp.tv_sec = itv->tv_sec + itv->tv_usec / 1000000L;
|
|
tmp.tv_usec = itv->tv_usec % 1000000L;
|
|
if (tmp.tv_sec > MAX_SEC || tmp.tv_sec < MIN_SEC)
|
|
{
|
|
__set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
tntx.offset = tmp.tv_usec + tmp.tv_sec * 1000000L;
|
|
tntx.modes = ADJ_OFFSET_SINGLESHOT;
|
|
}
|
|
else
|
|
{
|
|
#ifdef ADJ_OFFSET_SS_READ
|
|
tntx.modes = ADJ_OFFSET_SS_READ;
|
|
#else
|
|
tntx.modes = 0;
|
|
#endif
|
|
}
|
|
|
|
#if defined ADJ_OFFSET_SS_READ && !defined __ASSUME_ADJ_OFFSET_SS_READ
|
|
again:
|
|
#endif
|
|
if (__builtin_expect (ADJTIMEX (&tntx) < 0, 0))
|
|
{
|
|
#if defined ADJ_OFFSET_SS_READ && !defined __ASSUME_ADJ_OFFSET_SS_READ
|
|
if (itv && errno == EINVAL && tntx.modes == ADJ_OFFSET_SS_READ)
|
|
{
|
|
tntx.modes = ADJ_OFFSET_SINGLESHOT;
|
|
goto again;
|
|
}
|
|
#endif
|
|
return -1;
|
|
}
|
|
|
|
if (otv)
|
|
{
|
|
if (tntx.offset < 0)
|
|
{
|
|
otv->tv_usec = -(-tntx.offset % 1000000);
|
|
otv->tv_sec = -(-tntx.offset / 1000000);
|
|
}
|
|
else
|
|
{
|
|
otv->tv_usec = tntx.offset % 1000000;
|
|
otv->tv_sec = tntx.offset / 1000000;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#ifdef NO_LOCAL_ADJTIME
|
|
weak_alias (__adjtime, adjtime)
|
|
#endif
|