1 /* Test of usleep() function.
2    Copyright (C) 2009-2020 Free Software Foundation, Inc.
3 
4    This program is free software: you can redistribute it and/or modify
5    it under the terms of the GNU General Public License as published by
6    the Free Software Foundation; either version 3 of the License, or
7    (at your option) any later version.
8 
9    This program is distributed in the hope that it will be useful,
10    but WITHOUT ANY WARRANTY; without even the implied warranty of
11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12    GNU General Public License for more details.
13 
14    You should have received a copy of the GNU General Public License
15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
16 
17 /* Written by Eric Blake <ebb9@byu.net>, 2009.  */
18 
19 #include <config.h>
20 
21 #include <unistd.h>
22 
23 #include "signature.h"
24 SIGNATURE_CHECK (usleep, int, (useconds_t));
25 
26 #include <time.h>
27 
28 #include "macros.h"
29 
30 int
main(void)31 main (void)
32 {
33   time_t start = time (NULL);
34   ASSERT (usleep (1000000) == 0);
35   ASSERT (start < time (NULL));
36 
37   ASSERT (usleep (0) == 0);
38 
39   return 0;
40 }
41