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Diffstat (limited to 'sysdeps/posix/sleep.c')
-rw-r--r-- | sysdeps/posix/sleep.c | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/sysdeps/posix/sleep.c b/sysdeps/posix/sleep.c deleted file mode 100644 index b3162baab1..0000000000 --- a/sysdeps/posix/sleep.c +++ /dev/null @@ -1,66 +0,0 @@ -/* Sleep for a given number of seconds. POSIX.1 version. - Copyright (C) 1991-2017 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, see - <http://www.gnu.org/licenses/>. */ - -#include <time.h> -#include <unistd.h> -#include <errno.h> -#include <sys/param.h> - - -/* Make the process sleep for SECONDS seconds, or until a signal arrives - and is not ignored. The function returns the number of seconds less - than SECONDS which it actually slept (zero if it slept the full time). - If a signal handler does a `longjmp' or modifies the handling of the - SIGALRM signal while inside `sleep' call, the handling of the SIGALRM - signal afterwards is undefined. There is no return value to indicate - error, but if `sleep' returns SECONDS, it probably didn't work. */ -unsigned int -__sleep (unsigned int seconds) -{ - int save_errno = errno; - - const unsigned int max - = (unsigned int) (((unsigned long int) (~((time_t) 0))) >> 1); - struct timespec ts = { 0, 0 }; - do - { - if (sizeof (ts.tv_sec) <= sizeof (seconds)) - { - /* Since SECONDS is unsigned assigning the value to .tv_sec can - overflow it. In this case we have to wait in steps. */ - ts.tv_sec += MIN (seconds, max); - seconds -= (unsigned int) ts.tv_sec; - } - else - { - ts.tv_sec = (time_t) seconds; - seconds = 0; - } - - if (__nanosleep (&ts, &ts) < 0) - /* We were interrupted. - Return the number of (whole) seconds we have not yet slept. */ - return seconds + ts.tv_sec; - } - while (seconds > 0); - - __set_errno (save_errno); - - return 0; -} -weak_alias (__sleep, sleep) |