1 /*
2 *
3 * Copyright (c) International Business Machines Corp., 2001
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program 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
13 * the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 /*
21 * NAME
22 * sched_yield01.C
23 *
24 * DESCRIPTION
25 * Testcase to check that sched_yield returns correct values.
26 *
27 * ALGORITHM
28 * Call sched_yield(), check its return value. If it is 0, then pass,
29 * otherwise fail with proper errno!
30 *
31 * USAGE: <for command-line>
32 * sched_yield01 [-c n] [-i n] [-I x] [-P x] [-t]
33 * where, -c n : Run n copies concurrently.
34 * -i n : Execute test n times.
35 * -I x : Execute test for x seconds.
36 * -P x : Pause for x seconds between iterations.
37 * -t : Turn on syscall timing.
38 *
39 * HISTORY
40 * 07/2001 Ported by Wayne Boyer
41 *
42 * RESTRICTIONS
43 * None
44 */
45 #include <stdio.h>
46 #include <sched.h>
47 #include <errno.h>
48 #include "test.h"
49
50 char *TCID = "sched_yield01";
51 int TST_TOTAL = 1;
52
53 void setup(void);
54 void cleanup(void);
55
main(int ac,char ** av)56 int main(int ac, char **av)
57 {
58 int lc;
59
60 tst_parse_opts(ac, av, NULL, NULL);
61
62 setup();
63
64 for (lc = 0; TEST_LOOPING(lc); lc++) {
65
66 /* reset tst_count in case we are looping */
67 tst_count = 0;
68
69 TEST(sched_yield());
70
71 if (TEST_RETURN != 0) {
72 tst_resm(TFAIL, "call failed - errno %d : %s",
73 TEST_ERRNO, strerror(TEST_ERRNO));
74 } else {
75 tst_resm(TPASS, "sched_yield() call succeeded");
76 }
77 }
78 cleanup();
79 tst_exit();
80
81 }
82
83 /*
84 * setup() - performs all ONE TIME setup for this test.
85 */
setup(void)86 void setup(void)
87 {
88
89 tst_sig(NOFORK, DEF_HANDLER, cleanup);
90
91 TEST_PAUSE;
92 }
93
94 /*
95 * cleanup() - performs all ONE TIME cleanup for this test at
96 * completion or premature exit.
97 */
cleanup(void)98 void cleanup(void)
99 {
100
101 }
102