cosmopolitan/libc/calls/nanosleep.c
Jōshin e16a7d8f3b
flip et / noet in modelines
`et` means `expandtab`.

```sh
rg 'vi: .* :vi' -l -0 | \
  xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\)  :vi/vi: \1 xoet\2:vi/'
rg 'vi: .*  :vi' -l -0 | \
  xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2  :vi/'
rg 'vi: .*  :vi' -l -0 | \
  xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/'
```
2023-12-07 22:17:11 -05:00

48 lines
2.7 KiB
C

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/struct/timespec.h"
#include "libc/errno.h"
#include "libc/sysv/consts/clock.h"
/**
* Sleeps for relative amount of time.
*
* @param req is the duration of time we should sleep
* @param rem if non-null will be updated with the remainder of unslept
* time when -1 w/ `EINTR` is returned otherwise `rem` is undefined
* @return 0 on success, or -1 w/ errno
* @raise EINVAL if `req->tv_nsec ∉ [0,1000000000)`
* @raise ECANCELED if thread was cancelled in masked mode
* @raise EINTR if a signal was delivered and `rem` is updated
* @raise EFAULT if `req` is NULL or `req` / `rem` is a bad pointer
* @raise ENOSYS on bare metal
* @see clock_nanosleep()
* @cancelationpoint
* @norestart
*/
int nanosleep(const struct timespec *req, struct timespec *rem) {
errno_t err;
if (!(err = clock_nanosleep(CLOCK_REALTIME, 0, req, rem))) {
return 0;
} else {
errno = err;
return -1;
}
}