1 | /* Test sem_timedwait cancellation for contended case. |
2 | Copyright (C) 2003-2024 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 <errno.h> |
20 | #include <pthread.h> |
21 | #include <semaphore.h> |
22 | #include <stdio.h> |
23 | #include <stdlib.h> |
24 | #include <string.h> |
25 | #include <unistd.h> |
26 | #include <sys/time.h> |
27 | |
28 | |
29 | static pthread_barrier_t bar; |
30 | static sem_t sem; |
31 | |
32 | |
33 | static void |
34 | cleanup (void *arg) |
35 | { |
36 | static int ncall; |
37 | |
38 | if (++ncall != 1) |
39 | { |
40 | puts (s: "second call to cleanup" ); |
41 | exit (1); |
42 | } |
43 | } |
44 | |
45 | |
46 | static void * |
47 | tf (void *arg) |
48 | { |
49 | int e; |
50 | |
51 | pthread_cleanup_push (cleanup, NULL); |
52 | |
53 | e = pthread_barrier_wait (barrier: &bar); |
54 | if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) |
55 | { |
56 | puts (s: "error: tf: 1st barrier_wait failed" ); |
57 | exit (1); |
58 | } |
59 | |
60 | struct timeval tv; |
61 | (void) gettimeofday (tv: &tv, NULL); |
62 | |
63 | struct timespec ts; |
64 | TIMEVAL_TO_TIMESPEC (&tv, &ts); |
65 | |
66 | /* Timeout in 5 seconds. */ |
67 | ts.tv_sec += 5; |
68 | |
69 | /* This call should block and be cancelable. */ |
70 | errno = 0; |
71 | e = sem_timedwait (sem: &sem, abstime: &ts); |
72 | |
73 | pthread_cleanup_pop (0); |
74 | |
75 | return NULL; |
76 | } |
77 | |
78 | |
79 | static int |
80 | do_test (void) |
81 | { |
82 | pthread_t th; |
83 | |
84 | if (pthread_barrier_init (barrier: &bar, NULL, count: 2) != 0) |
85 | { |
86 | puts (s: "error: barrier_init failed" ); |
87 | exit (1); |
88 | } |
89 | |
90 | if (sem_init (sem: &sem, pshared: 0, value: 0) != 0) |
91 | { |
92 | puts (s: "error: sem_init failed" ); |
93 | exit (1); |
94 | } |
95 | |
96 | if (pthread_create (newthread: &th, NULL, start_routine: tf, NULL) != 0) |
97 | { |
98 | puts (s: "error: create failed" ); |
99 | exit (1); |
100 | } |
101 | |
102 | int e = pthread_barrier_wait (barrier: &bar); |
103 | if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) |
104 | { |
105 | puts (s: "error: 1st barrier_wait failed" ); |
106 | exit (1); |
107 | } |
108 | |
109 | /* Give the child a chance to go to sleep in sem_wait. */ |
110 | sleep (seconds: 1); |
111 | |
112 | /* Check whether cancellation is honored when waiting in sem_timedwait. */ |
113 | if (pthread_cancel (th: th) != 0) |
114 | { |
115 | puts (s: "error: 1st cancel failed" ); |
116 | exit (1); |
117 | } |
118 | |
119 | void *r; |
120 | if (pthread_join (th: th, thread_return: &r) != 0) |
121 | { |
122 | puts (s: "error: join failed" ); |
123 | exit (1); |
124 | } |
125 | |
126 | if (r != PTHREAD_CANCELED) |
127 | { |
128 | puts (s: "error: thread not canceled" ); |
129 | exit (1); |
130 | } |
131 | |
132 | return 0; |
133 | } |
134 | |
135 | |
136 | #define TEST_FUNCTION do_test () |
137 | #include "../test-skeleton.c" |
138 | |