1 /* Copyright (C) 2002-2023 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 <errno.h>
19 #include <pthread.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22
23
24 static pthread_mutex_t m;
25 static pthread_barrier_t b;
26
27
28 static void *
29 tf (void *arg)
30 {
31 int e = pthread_mutex_unlock (&m);
32 if (e == 0)
33 {
34 puts ("1st mutex_unlock in child succeeded");
35 exit (1);
36 }
37 if (e != EPERM)
38 {
39 puts ("1st mutex_unlock in child didn't return EPERM");
40 exit (1);
41 }
42
43 e = pthread_mutex_trylock (&m);
44 if (e == 0)
45 {
46 puts ("mutex_trylock in second thread succeeded");
47 exit (1);
48 }
49 if (e != EBUSY)
50 {
51 puts ("mutex_trylock returned wrong value");
52 exit (1);
53 }
54
55 e = pthread_barrier_wait (&b);
56 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
57 {
58 puts ("barrier_wait failed");
59 exit (1);
60 }
61
62 e = pthread_barrier_wait (&b);
63 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
64 {
65 puts ("barrier_wait failed");
66 exit (1);
67 }
68
69 e = pthread_mutex_unlock (&m);
70 if (e == 0)
71 {
72 puts ("2nd mutex_unlock in child succeeded");
73 exit (1);
74 }
75 if (e != EPERM)
76 {
77 puts ("2nd mutex_unlock in child didn't return EPERM");
78 exit (1);
79 }
80
81 if (pthread_mutex_trylock (&m) != 0)
82 {
83 puts ("2nd mutex_trylock in second thread failed");
84 exit (1);
85 }
86
87 if (pthread_mutex_unlock (&m) != 0)
88 {
89 puts ("3rd mutex_unlock in second thread failed");
90 exit (1);
91 }
92
93 return NULL;
94 }
95
96
97 static int
98 do_test (void)
99 {
100 pthread_mutexattr_t a;
101
102 if (pthread_mutexattr_init (&a) != 0)
103 {
104 puts ("mutexattr_init failed");
105 return 1;
106 }
107
108 if (pthread_mutexattr_settype (&a, PTHREAD_MUTEX_RECURSIVE) != 0)
109 {
110 puts ("mutexattr_settype failed");
111 return 1;
112 }
113
114 #ifdef ENABLE_PI
115 if (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_INHERIT) != 0)
116 {
117 puts ("pthread_mutexattr_setprotocol failed");
118 return 1;
119 }
120 #endif
121
122 int e;
123 e = pthread_mutex_init (&m, &a);
124 if (e != 0)
125 {
126 #ifdef ENABLE_PI
127 if (e == ENOTSUP)
128 {
129 puts ("PI mutexes unsupported");
130 return 0;
131 }
132 #endif
133 puts ("mutex_init failed");
134 return 1;
135 }
136
137 if (pthread_barrier_init (&b, NULL, 2) != 0)
138 {
139 puts ("barrier_init failed");
140 return 1;
141 }
142
143 if (pthread_mutex_lock (&m) != 0)
144 {
145 puts ("mutex_lock failed");
146 return 1;
147 }
148
149 if (pthread_mutex_lock (&m) != 0)
150 {
151 puts ("2nd mutex_lock failed");
152 return 1;
153 }
154
155 if (pthread_mutex_trylock (&m) != 0)
156 {
157 puts ("1st trylock failed");
158 return 1;
159 }
160
161 if (pthread_mutex_unlock (&m) != 0)
162 {
163 puts ("mutex_unlock failed");
164 return 1;
165 }
166
167 if (pthread_mutex_unlock (&m) != 0)
168 {
169 puts ("2nd mutex_unlock failed");
170 return 1;
171 }
172
173 pthread_t th;
174 if (pthread_create (&th, NULL, tf, NULL) != 0)
175 {
176 puts ("create failed");
177 return 1;
178 }
179
180 e = pthread_barrier_wait (&b);
181 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
182 {
183 puts ("barrier_wait failed");
184 return 1;
185 }
186
187 if (pthread_mutex_unlock (&m) != 0)
188 {
189 puts ("3rd mutex_unlock failed");
190 return 1;
191 }
192
193 e = pthread_mutex_unlock (&m);
194 if (e == 0)
195 {
196 puts ("4th mutex_unlock succeeded");
197 return 1;
198 }
199 if (e != EPERM)
200 {
201 puts ("4th mutex_unlock didn't return EPERM");
202 return 1;
203 }
204
205 e = pthread_barrier_wait (&b);
206 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
207 {
208 puts ("barrier_wait failed");
209 return 1;
210 }
211
212 if (pthread_join (th, NULL) != 0)
213 {
214 puts ("join failed");
215 return 1;
216 }
217
218 if (pthread_barrier_destroy (&b) != 0)
219 {
220 puts ("barrier_destroy failed");
221 return 1;
222 }
223
224 if (pthread_mutex_destroy (&m) != 0)
225 {
226 puts ("mutex_destroy failed");
227 return 1;
228 }
229
230 if (pthread_mutexattr_destroy (&a) != 0)
231 {
232 puts ("mutexattr_destroy failed");
233 return 1;
234 }
235
236 return 0;
237 }
238
239 #define TEST_FUNCTION do_test ()
240 #include "../test-skeleton.c"