1996-12-20 09:39:50 +08:00
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/* Implementation of the BSD usleep function using nanosleep.
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2018-01-01 08:32:25 +08:00
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Copyright (C) 1996-2018 Free Software Foundation, Inc.
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1996-12-20 09:39:50 +08:00
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
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The GNU C Library is free software; you can redistribute it and/or
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2001-07-06 12:58:11 +08:00
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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1996-12-20 09:39:50 +08:00
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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2001-07-06 12:58:11 +08:00
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Lesser General Public License for more details.
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1996-12-20 09:39:50 +08:00
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2001-07-06 12:58:11 +08:00
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You should have received a copy of the GNU Lesser General Public
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2012-02-10 07:18:22 +08:00
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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1996-12-20 09:39:50 +08:00
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#include <time.h>
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#include <unistd.h>
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2001-01-25 17:33:04 +08:00
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int
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1999-08-18 11:42:39 +08:00
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usleep (useconds_t useconds)
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1996-12-20 09:39:50 +08:00
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{
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2002-12-16 10:05:36 +08:00
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struct timespec ts = { .tv_sec = (long int) (useconds / 1000000),
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.tv_nsec = (long int) (useconds % 1000000) * 1000ul };
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1996-12-20 09:39:50 +08:00
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Update.
2003-06-15 Ulrich Drepper <drepper@redhat.com>
Fix cancellation point handling wrt exception based cleanup.
* io/Makefile: Compile fcntl.c, poll.c, and lockf.c with exceptions.
* misc/Makefile: Compile pselect.c, readv.c, writev.c, and usleep.c
with exceptions.
* posix/Makefile: Compile pread.c, pread64.c, pwrite.c, pwrite64.c,
sleep.c, wait.c, waitid.c, and waitpid.c with exceptions.
* rt/Makefile: Compile aio_suspend.c and clock_nanosleep.c with
exceptions.
* signal/Makefile: Compile sigpause.c, sigsuspend.c, sigtimedwait.c,
sigwait.c, and sigwaitinfo.c with exceptions.
* stdlib/Makefile: Compile system.c with exceptions.
* sysvipc/Makefile: Compile msgrcv.c and msgsnd.c with exceptions.
* termios/Makefile: Compile tcdrain.c with exceptions.
* sysdeps/generic/lockf.c: Add comment explaining the cancellation
situation.
* sysdeps/generic/pselect.c: Likewise.
* sysdeps/posix/sigpause.c: Likewise.
* sysdeps/posix/system.c: Likewise.
* sysdeps/posix/waitid.c: Likewise.
* sysdeps/unix/sysv/linux/sleep.c: Likewise.
* sysdeps/unix/sysv/linux/usleep.c: Likewise.
* sysdeps/unix/sysv/linux/i386/sysdep.h: Major rewrite of
INTERNAL_SYSCALL to not use push inside asm statement so that
unwind info is correct around the syscall.
* sysdeps/unix/clock_nanosleep.c: Add cancellation support.
* sysdeps/unix/sysv/linux/clock_nanosleep.c: Likewise.
2003-06-16 05:22:26 +08:00
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/* Note the usleep() is a cancellation point. But since we call
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nanosleep() which itself is a cancellation point we do not have
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to do anything here. */
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2001-01-25 17:33:04 +08:00
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return __nanosleep (&ts, NULL);
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1996-12-20 09:39:50 +08:00
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}
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