1 /* Test of nanosleep() function.
2 Copyright (C) 2009 Free Software Foundation, Inc.
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.
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.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Written by Eric Blake <ebb9@byu.net>, 2009. */
31 #define ASSERT(expr) \
36 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
45 handle_alarm (int sig)
60 ASSERT (nanosleep (&ts, NULL) == -1);
61 ASSERT (errno == EINVAL);
62 ts.tv_nsec = 1000000000;
64 ASSERT (nanosleep (&ts, NULL) == -1);
65 ASSERT (errno == EINVAL);
69 ASSERT (nanosleep (&ts, &ts) == 0);
70 /* Remaining time is only defined on EINTR failure; but on success,
71 it is typically either 0 or unchanged from input. At any rate,
72 it shouldn't be randomly changed to unrelated values. */
73 ASSERT (ts.tv_sec == 0);
74 ASSERT (ts.tv_nsec == 0 || ts.tv_nsec == 1);
76 ASSERT (nanosleep (&ts, NULL) == 0);
80 const time_t pentecost = 50 * 24 * 60 * 60; /* 50 days. */
81 signal (SIGALRM, handle_alarm);
83 ts.tv_sec = pentecost;
84 ts.tv_nsec = 999999999;
86 ASSERT (nanosleep (&ts, &ts) == -1);
87 ASSERT (errno == EINTR);
88 ASSERT (pentecost - 10 < ts.tv_sec && ts.tv_sec <= pentecost);
89 ASSERT (0 <= ts.tv_nsec && ts.tv_nsec <= 999999999);