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2b778ceb | 1 | /* Copyright (C) 2002-2021 Free Software Foundation, Inc. |
76a50749 | 2 | This file is part of the GNU C Library. |
76a50749 UD |
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 | |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
76a50749 UD |
17 | |
18 | #include <error.h> | |
19 | #include <pthread.h> | |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | ||
23 | ||
24 | static pthread_cond_t cond = PTHREAD_COND_INITIALIZER; | |
25 | static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER; | |
26 | ||
27 | ||
28 | static void * | |
29 | tf (void *p) | |
30 | { | |
31 | int err; | |
32 | ||
33 | err = pthread_mutex_lock (&mut); | |
34 | if (err != 0) | |
35 | error (EXIT_FAILURE, err, "child: cannot get mutex"); | |
36 | ||
37 | puts ("child: got mutex; signalling"); | |
38 | ||
39 | pthread_cond_signal (&cond); | |
40 | ||
41 | puts ("child: unlock"); | |
42 | ||
43 | err = pthread_mutex_unlock (&mut); | |
44 | if (err != 0) | |
45 | error (EXIT_FAILURE, err, "child: cannot unlock"); | |
46 | ||
47 | puts ("child: done"); | |
48 | ||
49 | return NULL; | |
50 | } | |
51 | ||
52 | ||
53 | static int | |
54 | do_test (void) | |
55 | { | |
56 | pthread_t th; | |
57 | int err; | |
58 | ||
59 | printf ("&cond = %p\n&mut = %p\n", &cond, &mut); | |
60 | ||
61 | puts ("parent: get mutex"); | |
62 | ||
63 | err = pthread_mutex_lock (&mut); | |
64 | if (err != 0) | |
65 | error (EXIT_FAILURE, err, "parent: cannot get mutex"); | |
66 | ||
67 | puts ("parent: create child"); | |
68 | ||
69 | err = pthread_create (&th, NULL, tf, NULL); | |
70 | if (err != 0) | |
71 | error (EXIT_FAILURE, err, "parent: cannot create thread"); | |
72 | ||
73 | puts ("parent: wait for condition"); | |
74 | ||
ed19993b TR |
75 | /* This test will fail on spurious wake-ups, which are allowed; however, |
76 | the current implementation shouldn't produce spurious wake-ups in the | |
77 | scenario we are testing here. */ | |
76a50749 UD |
78 | err = pthread_cond_wait (&cond, &mut); |
79 | if (err != 0) | |
80 | error (EXIT_FAILURE, err, "parent: cannot wait fir signal"); | |
81 | ||
82 | puts ("parent: got signal"); | |
83 | ||
84 | err = pthread_join (th, NULL); | |
85 | if (err != 0) | |
86 | error (EXIT_FAILURE, err, "parent: failed to join"); | |
87 | ||
88 | puts ("done"); | |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
93 | ||
94 | #define TEST_FUNCTION do_test () | |
95 | #include "../test-skeleton.c" |