1 | /* Copyright (C) 2002-2024 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library 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 GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <semaphore.h> |
20 | #include <stdio.h> |
21 | #include <unistd.h> |
22 | |
23 | |
24 | static int |
25 | do_test (void) |
26 | { |
27 | sem_t s; |
28 | |
29 | if (sem_init (sem: &s, pshared: 0, value: 1) == -1) |
30 | { |
31 | puts (s: "init failed" ); |
32 | return 1; |
33 | } |
34 | |
35 | if (TEMP_FAILURE_RETRY (sem_wait (&s)) == -1) |
36 | { |
37 | puts (s: "1st wait failed" ); |
38 | return 1; |
39 | } |
40 | |
41 | if (sem_post (sem: &s) == -1) |
42 | { |
43 | puts (s: "1st post failed" ); |
44 | return 1; |
45 | } |
46 | |
47 | if (TEMP_FAILURE_RETRY (sem_trywait (&s)) == -1) |
48 | { |
49 | puts (s: "1st trywait failed" ); |
50 | return 1; |
51 | } |
52 | |
53 | errno = 0; |
54 | if (TEMP_FAILURE_RETRY (sem_trywait (&s)) != -1) |
55 | { |
56 | puts (s: "2nd trywait succeeded" ); |
57 | return 1; |
58 | } |
59 | else if (errno != EAGAIN) |
60 | { |
61 | puts (s: "2nd trywait did not set errno to EAGAIN" ); |
62 | return 1; |
63 | } |
64 | |
65 | if (sem_post (sem: &s) == -1) |
66 | { |
67 | puts (s: "2nd post failed" ); |
68 | return 1; |
69 | } |
70 | |
71 | if (TEMP_FAILURE_RETRY (sem_wait (&s)) == -1) |
72 | { |
73 | puts (s: "2nd wait failed" ); |
74 | return 1; |
75 | } |
76 | |
77 | if (sem_destroy (sem: &s) == -1) |
78 | { |
79 | puts (s: "destroy failed" ); |
80 | return 1; |
81 | } |
82 | |
83 | return 0; |
84 | } |
85 | |
86 | #define TEST_FUNCTION do_test () |
87 | #include "../test-skeleton.c" |
88 | |