diff options
Diffstat (limited to 'sysdeps/unix/sysv/aix/gettimeofday.c')
| -rw-r--r-- | sysdeps/unix/sysv/aix/gettimeofday.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/aix/gettimeofday.c b/sysdeps/unix/sysv/aix/gettimeofday.c new file mode 100644 index 0000000000..6b5bd48085 --- /dev/null +++ b/sysdeps/unix/sysv/aix/gettimeofday.c @@ -0,0 +1,94 @@ +/* Copyright (C) 1991, 92, 94, 95, 96, 97 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <errno.h> +#include <time.h> +#include <sys/time.h> + +#ifndef HAVE_GNU_LD +#define __daylight daylight +#define __timezone timezone +#define __tzname tzname +#endif + +/* Assembler Routines to access the timer registers */ +asm(" +.rtc_upper: mfspr 3,4 # copy RTCU to return register + blr + +.rtc_lower: mfspr 3,5 # copy RTCL to return register + blr +"); + +/* Get the current time of day and timezone information, + putting it into *TV and *TZ. If TZ is NULL, *TZ is not filled. + Returns 0 on success, -1 on errors. */ +int +__gettimeofday (tv, tz) + struct timeval *tv; + struct timezone *tz; +{ + int ts, tl, tu; + + if (tv == NULL) + { + __set_errno (EINVAL); + return -1; + } + + ts = rtc_upper(); /* seconds */ + tl = rtc_lower(); /* nanoseconds */ + tu = rtc_upper(); /* Check for a carry from */ + if (ts != tu) /* the lower reg to the upper */ + tl = rtc_lower(); /* Recover from the race condition */ + + tv->tv_sec = (long int) (tu + (double)tl/1000000000); + tv->tv_usec = (long int) ((double)tl/1000); + +#if 0 + if (tz != NULL) + { + const time_t timer = tv->tv_sec; + struct tm tm; + const struct tm *tmp; + + const long int save_timezone = __timezone; + const long int save_daylight = __daylight; + char *save_tzname[2]; + save_tzname[0] = __tzname[0]; + save_tzname[1] = __tzname[1]; + + tmp = localtime_r (&timer, &tm); + + tz->tz_minuteswest = __timezone / 60; + tz->tz_dsttime = __daylight; + + __timezone = save_timezone; + __daylight = save_daylight; + __tzname[0] = save_tzname[0]; + __tzname[1] = save_tzname[1]; + + if (tmp == NULL) + return -1; + } +#endif + + return 0; +} + +weak_alias (__gettimeofday, gettimeofday) |