diff options
Diffstat (limited to 'gl/gettimeofday.c')
| -rw-r--r-- | gl/gettimeofday.c | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/gl/gettimeofday.c b/gl/gettimeofday.c deleted file mode 100644 index 18dcbda..0000000 --- a/gl/gettimeofday.c +++ /dev/null @@ -1,154 +0,0 @@ -/* Provide gettimeofday for systems that don't have it or for which it's broken. - - Copyright (C) 2001-2003, 2005-2007, 2009-2017 Free Software Foundation, Inc. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3, or (at your option) - any later version. - - This program 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 General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, see <http://www.gnu.org/licenses/>. */ - -/* written by Jim Meyering */ - -#include <config.h> - -/* Specification. */ -#include <sys/time.h> - -#include <time.h> - -#if HAVE_SYS_TIMEB_H -# include <sys/timeb.h> -#endif - -#if GETTIMEOFDAY_CLOBBERS_LOCALTIME || TZSET_CLOBBERS_LOCALTIME - -/* Work around the bug in some systems whereby gettimeofday clobbers - the static buffer that localtime uses for its return value. The - gettimeofday function from Mac OS X 10.0.4 (i.e., Darwin 1.3.7) has - this problem. The tzset replacement is necessary for at least - Solaris 2.5, 2.5.1, and 2.6. */ - -static struct tm tm_zero_buffer; -static struct tm *localtime_buffer_addr = &tm_zero_buffer; - -# undef localtime -extern struct tm *localtime (time_t const *); - -# undef gmtime -extern struct tm *gmtime (time_t const *); - -/* This is a wrapper for localtime. It is used only on systems for which - gettimeofday clobbers the static buffer used for localtime's result. - - On the first call, record the address of the static buffer that - localtime uses for its result. */ - -struct tm * -rpl_localtime (time_t const *timep) -{ - struct tm *tm = localtime (timep); - - if (localtime_buffer_addr == &tm_zero_buffer) - localtime_buffer_addr = tm; - - return tm; -} - -/* Same as above, since gmtime and localtime use the same buffer. */ -struct tm * -rpl_gmtime (time_t const *timep) -{ - struct tm *tm = gmtime (timep); - - if (localtime_buffer_addr == &tm_zero_buffer) - localtime_buffer_addr = tm; - - return tm; -} - -#endif /* GETTIMEOFDAY_CLOBBERS_LOCALTIME || TZSET_CLOBBERS_LOCALTIME */ - -#if TZSET_CLOBBERS_LOCALTIME - -# undef tzset -extern void tzset (void); - -/* This is a wrapper for tzset, for systems on which tzset may clobber - the static buffer used for localtime's result. */ -void -rpl_tzset (void) -{ - /* Save and restore the contents of the buffer used for localtime's - result around the call to tzset. */ - struct tm save = *localtime_buffer_addr; - tzset (); - *localtime_buffer_addr = save; -} -#endif - -/* This is a wrapper for gettimeofday. It is used only on systems - that lack this function, or whose implementation of this function - causes problems. */ - -int -gettimeofday (struct timeval *restrict tv, void *restrict tz) -{ -#undef gettimeofday -#if HAVE_GETTIMEOFDAY -# if GETTIMEOFDAY_CLOBBERS_LOCALTIME - /* Save and restore the contents of the buffer used for localtime's - result around the call to gettimeofday. */ - struct tm save = *localtime_buffer_addr; -# endif - -# if defined timeval /* 'struct timeval' overridden by gnulib? */ -# undef timeval - struct timeval otv; - int result = gettimeofday (&otv, (struct timezone *) tz); - if (result == 0) - { - tv->tv_sec = otv.tv_sec; - tv->tv_usec = otv.tv_usec; - } -# else - int result = gettimeofday (tv, (struct timezone *) tz); -# endif - -# if GETTIMEOFDAY_CLOBBERS_LOCALTIME - *localtime_buffer_addr = save; -# endif - - return result; - -#else - -# if HAVE__FTIME - - struct _timeb timebuf; - _ftime (&timebuf); - tv->tv_sec = timebuf.time; - tv->tv_usec = timebuf.millitm * 1000; - -# else - -# if !defined OK_TO_USE_1S_CLOCK -# error "Only 1-second nominal clock resolution found. Is that intended?" \ - "If so, compile with the -DOK_TO_USE_1S_CLOCK option." -# endif - tv->tv_sec = time (NULL); - tv->tv_usec = 0; - -# endif - - return 0; - -#endif -} |