1 | /* Copyright (C) 2003-2024 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 <errno.h> |
19 | #include <pthread.h> |
20 | #include <semaphore.h> |
21 | #include <signal.h> |
22 | #include <stdio.h> |
23 | #include <stdlib.h> |
24 | #include <unistd.h> |
25 | |
26 | |
27 | static int do_test (void); |
28 | |
29 | #define TEST_FUNCTION do_test () |
30 | #include "../test-skeleton.c" |
31 | |
32 | static pthread_t receiver; |
33 | static sem_t sem; |
34 | static pthread_barrier_t b; |
35 | |
36 | static void |
37 | handler (int sig) |
38 | { |
39 | if (sig != SIGUSR1) |
40 | { |
41 | write_message (message: "wrong signal\n" ); |
42 | _exit (1); |
43 | } |
44 | |
45 | if (pthread_self () != receiver) |
46 | { |
47 | write_message (message: "not the intended receiver\n" ); |
48 | _exit (1); |
49 | } |
50 | |
51 | if (sem_post (sem: &sem) != 0) |
52 | { |
53 | write_message (message: "sem_post failed\n" ); |
54 | _exit (1); |
55 | } |
56 | } |
57 | |
58 | |
59 | static void * |
60 | tf (void *a) |
61 | { |
62 | int e = pthread_barrier_wait (barrier: &b); |
63 | if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) |
64 | { |
65 | puts (s: "child: barrier_wait failed" ); |
66 | exit (1); |
67 | } |
68 | |
69 | return NULL; |
70 | } |
71 | |
72 | |
73 | int |
74 | do_test (void) |
75 | { |
76 | struct sigaction sa; |
77 | sigemptyset (&sa.sa_mask); |
78 | sa.sa_flags = 0; |
79 | sa.sa_handler = handler; |
80 | if (sigaction (SIGUSR1, act: &sa, NULL) != 0) |
81 | { |
82 | puts (s: "sigaction failed" ); |
83 | exit (1); |
84 | } |
85 | |
86 | #define N 20 |
87 | |
88 | if (pthread_barrier_init (barrier: &b, NULL, N + 1) != 0) |
89 | { |
90 | puts (s: "barrier_init failed" ); |
91 | exit (1); |
92 | } |
93 | |
94 | pthread_attr_t a; |
95 | |
96 | if (pthread_attr_init (attr: &a) != 0) |
97 | { |
98 | puts (s: "attr_init failed" ); |
99 | exit (1); |
100 | } |
101 | |
102 | if (pthread_attr_setstacksize (attr: &a, stacksize: 1 * 1024 * 1024) != 0) |
103 | { |
104 | puts (s: "attr_setstacksize failed" ); |
105 | return 1; |
106 | } |
107 | |
108 | pthread_t th[N]; |
109 | int i; |
110 | for (i = 0; i < N; ++i) |
111 | if (pthread_create (newthread: &th[i], attr: &a, start_routine: tf, NULL) != 0) |
112 | { |
113 | puts (s: "create failed" ); |
114 | exit (1); |
115 | } |
116 | |
117 | if (pthread_attr_destroy (attr: &a) != 0) |
118 | { |
119 | puts (s: "attr_destroy failed" ); |
120 | exit (1); |
121 | } |
122 | |
123 | if (sem_init (sem: &sem, pshared: 0, value: 0) != 0) |
124 | { |
125 | puts (s: "sem_init failed" ); |
126 | exit (1); |
127 | } |
128 | |
129 | for (i = 0; i < N * 10; ++i) |
130 | { |
131 | receiver = th[i % N]; |
132 | |
133 | if (pthread_kill (threadid: receiver, SIGUSR1) != 0) |
134 | { |
135 | puts (s: "kill failed" ); |
136 | exit (1); |
137 | } |
138 | |
139 | if (TEMP_FAILURE_RETRY (sem_wait (&sem)) != 0) |
140 | { |
141 | puts (s: "sem_wait failed" ); |
142 | exit (1); |
143 | } |
144 | } |
145 | |
146 | int e = pthread_barrier_wait (barrier: &b); |
147 | if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) |
148 | { |
149 | puts (s: "barrier_wait failed" ); |
150 | exit (1); |
151 | } |
152 | |
153 | for (i = 0; i < N; ++i) |
154 | if (pthread_join (th: th[i], NULL) != 0) |
155 | { |
156 | puts (s: "join failed" ); |
157 | exit (1); |
158 | } |
159 | |
160 | return 0; |
161 | } |
162 | |