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 <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 (mutex: &mut); |
34 | if (err != 0) |
35 | error (EXIT_FAILURE, errnum: err, format: "child: cannot get mutex" ); |
36 | |
37 | puts (s: "child: got mutex; signalling" ); |
38 | |
39 | pthread_cond_signal (cond: &cond); |
40 | |
41 | puts (s: "child: unlock" ); |
42 | |
43 | err = pthread_mutex_unlock (mutex: &mut); |
44 | if (err != 0) |
45 | error (EXIT_FAILURE, errnum: err, format: "child: cannot unlock" ); |
46 | |
47 | puts (s: "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 (format: "&cond = %p\n&mut = %p\n" , &cond, &mut); |
60 | |
61 | puts (s: "parent: get mutex" ); |
62 | |
63 | err = pthread_mutex_lock (mutex: &mut); |
64 | if (err != 0) |
65 | error (EXIT_FAILURE, errnum: err, format: "parent: cannot get mutex" ); |
66 | |
67 | puts (s: "parent: create child" ); |
68 | |
69 | err = pthread_create (newthread: &th, NULL, start_routine: tf, NULL); |
70 | if (err != 0) |
71 | error (EXIT_FAILURE, errnum: err, format: "parent: cannot create thread" ); |
72 | |
73 | puts (s: "parent: wait for condition" ); |
74 | |
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. */ |
78 | err = pthread_cond_wait (cond: &cond, mutex: &mut); |
79 | if (err != 0) |
80 | error (EXIT_FAILURE, errnum: err, format: "parent: cannot wait fir signal" ); |
81 | |
82 | puts (s: "parent: got signal" ); |
83 | |
84 | err = pthread_join (th: th, NULL); |
85 | if (err != 0) |
86 | error (EXIT_FAILURE, errnum: err, format: "parent: failed to join" ); |
87 | |
88 | puts (s: "done" ); |
89 | |
90 | return 0; |
91 | } |
92 | |
93 | |
94 | #define TEST_FUNCTION do_test () |
95 | #include "../test-skeleton.c" |
96 | |