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1 | /* | |
2 | * Copyright (C) 2013 Tobias Brunner | |
3 | * Copyright (C) 2008 Martin Willi | |
4 | * Hochschule fuer Technik Rapperswil | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
13 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | * for more details. | |
15 | */ | |
16 | ||
17 | #include <sched.h> | |
18 | #include <pthread.h> | |
19 | ||
20 | #include "test_suite.h" | |
21 | ||
22 | #include <threading/mutex.h> | |
23 | ||
24 | /******************************************************************************* | |
25 | * recursive mutex test | |
26 | */ | |
27 | ||
28 | #define THREADS 20 | |
29 | ||
30 | static mutex_t *mutex; | |
31 | ||
32 | static pthread_barrier_t mutex_barrier; | |
33 | ||
34 | static int mutex_locked = 0; | |
35 | ||
36 | static void *mutex_run(void *data) | |
37 | { | |
38 | int i; | |
39 | ||
40 | /* wait for all threads before getting in action */ | |
41 | pthread_barrier_wait(&mutex_barrier); | |
42 | ||
43 | for (i = 0; i < 100; i++) | |
44 | { | |
45 | mutex->lock(mutex); | |
46 | mutex->lock(mutex); | |
47 | mutex->lock(mutex); | |
48 | mutex_locked++; | |
49 | sched_yield(); | |
50 | if (mutex_locked > 1) | |
51 | { | |
52 | fail("two threads locked the mutex concurrently"); | |
53 | } | |
54 | mutex_locked--; | |
55 | mutex->unlock(mutex); | |
56 | mutex->unlock(mutex); | |
57 | mutex->unlock(mutex); | |
58 | } | |
59 | return NULL; | |
60 | } | |
61 | ||
62 | START_TEST(test_mutex) | |
63 | { | |
64 | pthread_t threads[THREADS]; | |
65 | int i; | |
66 | ||
67 | mutex = mutex_create(MUTEX_TYPE_RECURSIVE); | |
68 | ||
69 | for (i = 0; i < 10; i++) | |
70 | { | |
71 | mutex->lock(mutex); | |
72 | mutex->unlock(mutex); | |
73 | } | |
74 | for (i = 0; i < 10; i++) | |
75 | { | |
76 | mutex->lock(mutex); | |
77 | } | |
78 | for (i = 0; i < 10; i++) | |
79 | { | |
80 | mutex->unlock(mutex); | |
81 | } | |
82 | ||
83 | pthread_barrier_init(&mutex_barrier, NULL, THREADS); | |
84 | for (i = 0; i < THREADS; i++) | |
85 | { | |
86 | pthread_create(&threads[i], NULL, mutex_run, NULL); | |
87 | } | |
88 | for (i = 0; i < THREADS; i++) | |
89 | { | |
90 | pthread_join(threads[i], NULL); | |
91 | } | |
92 | pthread_barrier_destroy(&mutex_barrier); | |
93 | ||
94 | mutex->destroy(mutex); | |
95 | } | |
96 | END_TEST | |
97 | ||
98 | Suite *threading_suite_create() | |
99 | { | |
100 | Suite *s; | |
101 | TCase *tc; | |
102 | ||
103 | s = suite_create("threading"); | |
104 | ||
105 | tc = tcase_create("recursive mutex"); | |
106 | tcase_add_test(tc, test_mutex); | |
107 | suite_add_tcase(s, tc); | |
108 | ||
109 | return s; | |
110 | } |