| /* 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 |