1 | /* Copyright (C) 2004-2024 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 <pthread.h> |
19 | #include <stdio.h> |
20 | #include <stdlib.h> |
21 | #include <string.h> |
22 | #include <unistd.h> |
23 | |
24 | #define N 10 |
25 | #define ROUNDS 1000 |
26 | static pthread_cond_t cond = PTHREAD_COND_INITIALIZER; |
27 | static pthread_cond_t cond2 = PTHREAD_COND_INITIALIZER; |
28 | static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER; |
29 | static pthread_barrier_t b; |
30 | static int count; |
31 | |
32 | static void * |
33 | tf (void *p) |
34 | { |
35 | int i; |
36 | for (i = 0; i < ROUNDS; ++i) |
37 | { |
38 | pthread_mutex_lock (mutex: &mut); |
39 | |
40 | if (++count == N) |
41 | pthread_cond_signal (cond: &cond2); |
42 | |
43 | #ifdef TIMED |
44 | struct timeval tv; |
45 | gettimeofday (&tv, NULL); |
46 | struct timespec ts; |
47 | /* Wait three seconds. */ |
48 | ts.tv_sec = tv.tv_sec + 3; |
49 | ts.tv_nsec = tv.tv_usec * 1000; |
50 | pthread_cond_timedwait (&cond, &mut, &ts); |
51 | #else |
52 | pthread_cond_wait (cond: &cond, mutex: &mut); |
53 | #endif |
54 | |
55 | pthread_mutex_unlock (mutex: &mut); |
56 | |
57 | int err = pthread_barrier_wait (barrier: &b); |
58 | if (err != 0 && err != PTHREAD_BARRIER_SERIAL_THREAD) |
59 | { |
60 | puts (s: "child: barrier_wait failed" ); |
61 | exit (1); |
62 | } |
63 | |
64 | err = pthread_barrier_wait (barrier: &b); |
65 | if (err != 0 && err != PTHREAD_BARRIER_SERIAL_THREAD) |
66 | { |
67 | puts (s: "child: barrier_wait failed" ); |
68 | exit (1); |
69 | } |
70 | } |
71 | |
72 | return NULL; |
73 | } |
74 | |
75 | |
76 | static int |
77 | do_test (void) |
78 | { |
79 | if (pthread_barrier_init (barrier: &b, NULL, N + 1) != 0) |
80 | { |
81 | puts (s: "barrier_init failed" ); |
82 | return 1; |
83 | } |
84 | |
85 | pthread_mutex_lock (mutex: &mut); |
86 | |
87 | int i, j, err; |
88 | pthread_t th[N]; |
89 | for (i = 0; i < N; ++i) |
90 | if ((err = pthread_create (newthread: &th[i], NULL, start_routine: tf, NULL)) != 0) |
91 | { |
92 | printf (format: "cannot create thread %d: %s\n" , i, strerror (errnum: err)); |
93 | return 1; |
94 | } |
95 | |
96 | for (i = 0; i < ROUNDS; ++i) |
97 | { |
98 | /* Make sure we discard spurious wake-ups. */ |
99 | do |
100 | pthread_cond_wait (cond: &cond2, mutex: &mut); |
101 | while (count != N); |
102 | |
103 | if (i & 1) |
104 | pthread_mutex_unlock (mutex: &mut); |
105 | |
106 | if (i & 2) |
107 | pthread_cond_broadcast (cond: &cond); |
108 | else if (i & 4) |
109 | for (j = 0; j < N; ++j) |
110 | pthread_cond_signal (cond: &cond); |
111 | else |
112 | { |
113 | for (j = 0; j < (i / 8) % N; ++j) |
114 | pthread_cond_signal (cond: &cond); |
115 | pthread_cond_broadcast (cond: &cond); |
116 | } |
117 | |
118 | if ((i & 1) == 0) |
119 | pthread_mutex_unlock (mutex: &mut); |
120 | |
121 | err = pthread_cond_destroy (cond: &cond); |
122 | if (err) |
123 | { |
124 | printf (format: "pthread_cond_destroy failed: %s\n" , strerror (errnum: err)); |
125 | return 1; |
126 | } |
127 | |
128 | /* Now clobber the cond variable which has been successfully |
129 | destroyed above. */ |
130 | memset (&cond, (char) i, sizeof (cond)); |
131 | |
132 | err = pthread_barrier_wait (barrier: &b); |
133 | if (err != 0 && err != PTHREAD_BARRIER_SERIAL_THREAD) |
134 | { |
135 | puts (s: "parent: barrier_wait failed" ); |
136 | return 1; |
137 | } |
138 | |
139 | pthread_mutex_lock (mutex: &mut); |
140 | |
141 | err = pthread_barrier_wait (barrier: &b); |
142 | if (err != 0 && err != PTHREAD_BARRIER_SERIAL_THREAD) |
143 | { |
144 | puts (s: "parent: barrier_wait failed" ); |
145 | return 1; |
146 | } |
147 | |
148 | count = 0; |
149 | err = pthread_cond_init (cond: &cond, NULL); |
150 | if (err) |
151 | { |
152 | printf (format: "pthread_cond_init failed: %s\n" , strerror (errnum: err)); |
153 | return 1; |
154 | } |
155 | } |
156 | |
157 | for (i = 0; i < N; ++i) |
158 | if ((err = pthread_join (th: th[i], NULL)) != 0) |
159 | { |
160 | printf (format: "failed to join thread %d: %s\n" , i, strerror (errnum: err)); |
161 | return 1; |
162 | } |
163 | |
164 | puts (s: "done" ); |
165 | |
166 | return 0; |
167 | } |
168 | |
169 | |
170 | #define TEST_FUNCTION do_test () |
171 | #include "../test-skeleton.c" |
172 | |