1 | /* Verify that condition variables synchronized by PI mutexes don't hang. |
2 | Copyright (C) 2012-2024 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
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 |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <pthread.h> |
20 | #include <stdio.h> |
21 | #include <stdlib.h> |
22 | #include <string.h> |
23 | #include <errno.h> |
24 | #include <sys/types.h> |
25 | #include <sys/syscall.h> |
26 | #include <unistd.h> |
27 | #include <sys/time.h> |
28 | #include <time.h> |
29 | |
30 | #define THREADS_NUM 5 |
31 | #define MAXITER 50000 |
32 | |
33 | static pthread_mutex_t mutex; |
34 | static pthread_mutexattr_t mutex_attr; |
35 | static pthread_cond_t cond; |
36 | static pthread_t threads[THREADS_NUM]; |
37 | static int pending = 0; |
38 | |
39 | typedef void * (*threadfunc) (void *); |
40 | |
41 | void * |
42 | thread_fun_timed (void *arg) |
43 | { |
44 | int *ret = arg; |
45 | int rv, i; |
46 | |
47 | printf (format: "Started thread_fun_timed[%d]\n" , *ret); |
48 | |
49 | for (i = 0; i < MAXITER / THREADS_NUM; i++) |
50 | { |
51 | rv = pthread_mutex_lock (mutex: &mutex); |
52 | if (rv) |
53 | { |
54 | printf (format: "pthread_mutex_lock: %s(%d)\n" , strerror (errnum: rv), rv); |
55 | *ret = 1; |
56 | goto out; |
57 | } |
58 | |
59 | while (!pending) |
60 | { |
61 | struct timespec ts; |
62 | clock_gettime(CLOCK_REALTIME, tp: &ts); |
63 | ts.tv_sec += 20; |
64 | rv = pthread_cond_timedwait (cond: &cond, mutex: &mutex, abstime: &ts); |
65 | |
66 | /* There should be no timeout either. */ |
67 | if (rv) |
68 | { |
69 | printf (format: "pthread_cond_wait: %s(%d)\n" , strerror (errnum: rv), rv); |
70 | *ret = 1; |
71 | goto out; |
72 | } |
73 | } |
74 | |
75 | pending--; |
76 | |
77 | rv = pthread_mutex_unlock (mutex: &mutex); |
78 | if (rv) |
79 | { |
80 | printf (format: "pthread_mutex_unlock: %s(%d)\n" , strerror (errnum: rv), rv); |
81 | *ret = 1; |
82 | goto out; |
83 | } |
84 | } |
85 | |
86 | *ret = 0; |
87 | |
88 | out: |
89 | return ret; |
90 | } |
91 | |
92 | void * |
93 | thread_fun (void *arg) |
94 | { |
95 | int *ret = arg; |
96 | int rv, i; |
97 | |
98 | printf (format: "Started thread_fun[%d]\n" , *ret); |
99 | |
100 | for (i = 0; i < MAXITER / THREADS_NUM; i++) |
101 | { |
102 | rv = pthread_mutex_lock (mutex: &mutex); |
103 | if (rv) |
104 | { |
105 | printf (format: "pthread_mutex_lock: %s(%d)\n" , strerror (errnum: rv), rv); |
106 | *ret = 1; |
107 | goto out; |
108 | } |
109 | |
110 | while (!pending) |
111 | { |
112 | rv = pthread_cond_wait (cond: &cond, mutex: &mutex); |
113 | |
114 | if (rv) |
115 | { |
116 | printf (format: "pthread_cond_wait: %s(%d)\n" , strerror (errnum: rv), rv); |
117 | *ret = 1; |
118 | goto out; |
119 | } |
120 | } |
121 | |
122 | pending--; |
123 | |
124 | rv = pthread_mutex_unlock (mutex: &mutex); |
125 | if (rv) |
126 | { |
127 | printf (format: "pthread_mutex_unlock: %s(%d)\n" , strerror (errnum: rv), rv); |
128 | *ret = 1; |
129 | goto out; |
130 | } |
131 | } |
132 | |
133 | *ret = 0; |
134 | |
135 | out: |
136 | return ret; |
137 | } |
138 | |
139 | static int |
140 | do_test_wait (threadfunc f) |
141 | { |
142 | int i; |
143 | int rv; |
144 | int counter = 0; |
145 | int retval[THREADS_NUM]; |
146 | |
147 | puts (s: "Starting test" ); |
148 | |
149 | rv = pthread_mutexattr_init (attr: &mutex_attr); |
150 | if (rv) |
151 | { |
152 | printf (format: "pthread_mutexattr_init: %s(%d)\n" , strerror (errnum: rv), rv); |
153 | return 1; |
154 | } |
155 | |
156 | rv = pthread_mutexattr_setprotocol (attr: &mutex_attr, protocol: PTHREAD_PRIO_INHERIT); |
157 | if (rv) |
158 | { |
159 | printf (format: "pthread_mutexattr_setprotocol: %s(%d)\n" , strerror (errnum: rv), rv); |
160 | return 1; |
161 | } |
162 | |
163 | rv = pthread_mutex_init (mutex: &mutex, mutexattr: &mutex_attr); |
164 | if (rv) |
165 | { |
166 | printf (format: "pthread_mutex_init: %s(%d)\n" , strerror (errnum: rv), rv); |
167 | return 1; |
168 | } |
169 | |
170 | rv = pthread_cond_init (cond: &cond, NULL); |
171 | if (rv) |
172 | { |
173 | printf (format: "pthread_cond_init: %s(%d)\n" , strerror (errnum: rv), rv); |
174 | return 1; |
175 | } |
176 | |
177 | for (i = 0; i < THREADS_NUM; i++) |
178 | { |
179 | retval[i] = i; |
180 | rv = pthread_create (newthread: &threads[i], NULL, start_routine: f, arg: &retval[i]); |
181 | if (rv) |
182 | { |
183 | printf (format: "pthread_create: %s(%d)\n" , strerror (errnum: rv), rv); |
184 | return 1; |
185 | } |
186 | } |
187 | |
188 | for (; counter < MAXITER; counter++) |
189 | { |
190 | rv = pthread_mutex_lock (mutex: &mutex); |
191 | if (rv) |
192 | { |
193 | printf (format: "pthread_mutex_lock: %s(%d)\n" , strerror (errnum: rv), rv); |
194 | return 1; |
195 | } |
196 | |
197 | if (!(counter % 100)) |
198 | printf (format: "counter: %d\n" , counter); |
199 | pending += 1; |
200 | |
201 | rv = pthread_cond_signal (cond: &cond); |
202 | if (rv) |
203 | { |
204 | printf (format: "pthread_cond_signal: %s(%d)\n" , strerror (errnum: rv), rv); |
205 | return 1; |
206 | } |
207 | |
208 | rv = pthread_mutex_unlock (mutex: &mutex); |
209 | if (rv) |
210 | { |
211 | printf (format: "pthread_mutex_unlock: %s(%d)\n" , strerror (errnum: rv), rv); |
212 | return 1; |
213 | } |
214 | } |
215 | |
216 | for (i = 0; i < THREADS_NUM; i++) |
217 | { |
218 | void *ret; |
219 | rv = pthread_join (th: threads[i], thread_return: &ret); |
220 | if (rv) |
221 | { |
222 | printf (format: "pthread_join: %s(%d)\n" , strerror (errnum: rv), rv); |
223 | return 1; |
224 | } |
225 | if (ret && *(int *)ret) |
226 | { |
227 | printf (format: "Thread %d returned with an error\n" , i); |
228 | return 1; |
229 | } |
230 | } |
231 | |
232 | return 0; |
233 | } |
234 | |
235 | static int |
236 | do_test (void) |
237 | { |
238 | puts (s: "Testing pthread_cond_wait" ); |
239 | int ret = do_test_wait (f: thread_fun); |
240 | if (ret) |
241 | return ret; |
242 | |
243 | puts (s: "Testing pthread_cond_timedwait" ); |
244 | return do_test_wait (f: thread_fun_timed); |
245 | } |
246 | |
247 | #define TEST_FUNCTION do_test () |
248 | #include "../test-skeleton.c" |
249 | |