1 /* Test of usleep() function. 2 Copyright (C) 2009-2021 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 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 }