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d614a753 | 1 | /* Copyright (C) 2002-2020 Free Software Foundation, Inc. |
76a50749 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library 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 the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
76a50749 UD |
18 | |
19 | #include <pthread.h> | |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <unistd.h> | |
24 | ||
7e625f7e FW |
25 | static int do_test (void); |
26 | ||
27 | #define TEST_FUNCTION do_test () | |
28 | #include "../test-skeleton.c" | |
76a50749 UD |
29 | |
30 | /* Note that this test requires more than the standard. It is | |
31 | required that there are no spurious wakeups if only more readers | |
32 | are added. This is a reasonable demand. */ | |
33 | ||
34 | ||
35 | static pthread_cond_t cond = PTHREAD_COND_INITIALIZER; | |
36 | static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER; | |
37 | ||
38 | ||
39 | #define N 10 | |
40 | ||
41 | ||
42 | static void * | |
43 | tf (void *arg) | |
44 | { | |
45 | int i = (long int) arg; | |
46 | int err; | |
47 | ||
48 | /* Get the mutex. */ | |
49 | err = pthread_mutex_lock (&mut); | |
50 | if (err != 0) | |
51 | { | |
52 | printf ("child %d mutex_lock failed: %s\n", i, strerror (err)); | |
53 | exit (1); | |
54 | } | |
55 | ||
56 | /* This call should never return. */ | |
7e625f7e FW |
57 | xpthread_cond_wait (&cond, &mut); |
58 | puts ("error: pthread_cond_wait in tf returned"); | |
76a50749 UD |
59 | |
60 | /* We should never get here. */ | |
61 | exit (1); | |
62 | ||
63 | return NULL; | |
64 | } | |
65 | ||
66 | ||
67 | static int | |
68 | do_test (void) | |
69 | { | |
70 | int err; | |
71 | int i; | |
72 | ||
73 | for (i = 0; i < N; ++i) | |
74 | { | |
75 | pthread_t th; | |
76 | ||
77 | if (i != 0) | |
78 | { | |
79 | /* Release the mutex. */ | |
80 | err = pthread_mutex_unlock (&mut); | |
81 | if (err != 0) | |
82 | { | |
83 | printf ("mutex_unlock %d failed: %s\n", i, strerror (err)); | |
84 | return 1; | |
85 | } | |
86 | } | |
87 | ||
88 | err = pthread_create (&th, NULL, tf, (void *) (long int) i); | |
89 | if (err != 0) | |
90 | { | |
91 | printf ("create %d failed: %s\n", i, strerror (err)); | |
92 | return 1; | |
93 | } | |
94 | ||
95 | /* Get the mutex. */ | |
96 | err = pthread_mutex_lock (&mut); | |
97 | if (err != 0) | |
98 | { | |
99 | printf ("mutex_lock %d failed: %s\n", i, strerror (err)); | |
100 | return 1; | |
101 | } | |
102 | } | |
103 | ||
7e625f7e | 104 | delayed_exit (1); |
76a50749 UD |
105 | |
106 | /* This call should never return. */ | |
7e625f7e | 107 | xpthread_cond_wait (&cond, &mut); |
76a50749 | 108 | |
7e625f7e | 109 | puts ("error: pthread_cond_wait in do_test returned"); |
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110 | return 1; |
111 | } |