| 1 | /* Implementation of the BSD usleep function using nanosleep. |
|---|
| 2 | Copyright (C) 1996-2022 Free Software Foundation, Inc. |
|---|
| 3 | This file is part of the GNU C Library. |
|---|
| 4 | |
|---|
| 5 | The GNU C Library is free software; you can redistribute it and/or |
|---|
| 6 | modify it under the terms of the GNU Lesser General Public |
|---|
| 7 | License as published by the Free Software Foundation; either |
|---|
| 8 | version 2.1 of the License, or (at your option) any later version. |
|---|
| 9 | |
|---|
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
|---|
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
|---|
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|---|
| 13 | Lesser General Public License for more details. |
|---|
| 14 | |
|---|
| 15 | You should have received a copy of the GNU Lesser General Public |
|---|
| 16 | License along with the GNU C Library; if not, see |
|---|
| 17 | <https://www.gnu.org/licenses/>. */ |
|---|
| 18 | |
|---|
| 19 | #include <time.h> |
|---|
| 20 | #include <unistd.h> |
|---|
| 21 | |
|---|
| 22 | int |
|---|
| 23 | usleep (useconds_t useconds) |
|---|
| 24 | { |
|---|
| 25 | struct timespec ts = { .tv_sec = (long int) (useconds / 1000000), |
|---|
| 26 | .tv_nsec = (long int) (useconds % 1000000) * 1000ul }; |
|---|
| 27 | |
|---|
| 28 | /* Note the usleep() is a cancellation point. But since we call |
|---|
| 29 | nanosleep() which itself is a cancellation point we do not have |
|---|
| 30 | to do anything here. */ |
|---|
| 31 | return __nanosleep (&ts, NULL); |
|---|
| 32 | } |
|---|
| 33 | |
|---|
