Rich Felker 05453b37fc fix overflow behavior of clock() function ...

per Austin Group interpretation for issue #686, which cites the
requirements of ISO C, clock() cannot wrap. if the result is not
representable, it must return (clock_t)-1. in addition, the old code
was performing wrapping via signed overflow and thus invoking
undefined behavior.

since it seems impossible to accurately check for overflow with the
old times()-based fallback code, I have simply dropped the fallback
code for now, thus always returning -1 on ancient systems. if there's
a demand for making it work and somebody comes up with a way, it could
be reinstated, but the clock() function is essentially useless on
32-bit system anyway (it overflows in less than an hour).

it should be noted that I used LONG_MAX rather than ULONG_MAX, despite
32-bit archs using an unsigned type for clock_t. this discrepency with
the glibc/LSB type definitions will be fixed now; since wrapping of
clock_t is no longer supported, there's no use in it being unsigned.

2013-05-23 14:31:02 -04:00

..

__asctime.c

use restrict everywhere it's required by c99 and/or posix 2008

2012-09-06 22:44:55 -04:00

__time_to_tm.c

__time_to_tm: initialize tm_zone and tm_gmtoff

2013-04-02 04:43:53 +02:00

__time.h

initial check-in, version 0.5.0

2011-02-12 00:22:29 -05:00

__tm_to_time.c

make some arrays const

2013-02-02 03:19:25 +01:00

asctime_r.c

use restrict everywhere it's required by c99 and/or posix 2008

2012-09-06 22:44:55 -04:00

asctime.c

initial check-in, version 0.5.0

2011-02-12 00:22:29 -05:00

clock_getcpuclockid.c

implement the remaining clock_* interfaces

2011-02-19 12:43:56 -05:00

clock_getres.c

global cleanup to use the new syscall interface

2011-03-20 00:16:43 -04:00

clock_gettime.c

use weak aliase rather than weak reference for vdso clock_gettime

2011-08-07 15:48:16 -04:00

clock_nanosleep.c

overhaul pthread cancellation

2011-04-17 11:43:03 -04:00

clock_settime.c

global cleanup to use the new syscall interface

2011-03-20 00:16:43 -04:00

clock.c

fix overflow behavior of clock() function

2013-05-23 14:31:02 -04:00

ctime_r.c

initial check-in, version 0.5.0

2011-02-12 00:22:29 -05:00

ctime.c

initial check-in, version 0.5.0

2011-02-12 00:22:29 -05:00

difftime.c

initial check-in, version 0.5.0

2011-02-12 00:22:29 -05:00

getdate.c

more close-on-exec fixes, mostly using new "e" flag to fopen

2012-09-29 18:14:46 -04:00

gettimeofday.c

use restrict everywhere it's required by c99 and/or posix 2008

2012-09-06 22:44:55 -04:00

gmtime_r.c

use restrict everywhere it's required by c99 and/or posix 2008

2012-09-06 22:44:55 -04:00

gmtime.c

initial check-in, version 0.5.0

2011-02-12 00:22:29 -05:00

localtime_r.c

use restrict everywhere it's required by c99 and/or posix 2008

2012-09-06 22:44:55 -04:00

localtime.c

initial check-in, version 0.5.0

2011-02-12 00:22:29 -05:00

mktime.c

initial check-in, version 0.5.0

2011-02-12 00:22:29 -05:00

nanosleep.c

overhaul pthread cancellation

2011-04-17 11:43:03 -04:00

strftime.c

use restrict everywhere it's required by c99 and/or posix 2008

2012-09-06 22:44:55 -04:00

strptime.c

use restrict everywhere it's required by c99 and/or posix 2008

2012-09-06 22:44:55 -04:00

time.c

some preliminaries for vdso clock support

2011-07-23 23:45:33 -04:00

timegm.c

add timegm function (inverse of gmtime), nonstandard

2012-06-13 14:41:52 -04:00

timer_create.c

silence nonsensical warnings in timer_create

2013-04-06 18:32:11 -04:00

timer_delete.c

greatly improve SIGEV_THREAD timers

2011-04-09 02:23:33 -04:00

timer_getoverrun.c

fix signal-based timers with null sigevent argument

2011-04-06 09:26:41 -04:00

timer_gettime.c

fix signal-based timers with null sigevent argument

2011-04-06 09:26:41 -04:00

timer_settime.c

use restrict everywhere it's required by c99 and/or posix 2008

2012-09-06 22:44:55 -04:00

times.c

do not interpret errors in return value of times() syscall

2013-05-05 14:19:37 -04:00

tzset.c

ditch the priority inheritance locks; use malloc's version of lock

2012-04-24 16:32:23 -04:00

utime.c

linux deprecated SYS_utime on some archs, so use SYS_utimes instead

2012-05-24 10:55:58 -04:00

wcsftime.c

use restrict everywhere it's required by c99 and/or posix 2008

2012-09-06 22:44:55 -04:00