1 | /* Test pthread_rwlock_timedrdlock and pthread_rwlock_timedwrlock. |
2 | Copyright (C) 2000-2024 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 | #define _GNU_SOURCE |
20 | |
21 | #include <pthread.h> |
22 | #include <stdio.h> |
23 | #include <assert.h> |
24 | #include <error.h> |
25 | #include <errno.h> |
26 | #include <sys/time.h> |
27 | |
28 | #define THREADS 10 |
29 | |
30 | pthread_rwlock_t rwlock; |
31 | |
32 | void * |
33 | test (void *arg) |
34 | { |
35 | error_t err; |
36 | int foo = (int) arg; |
37 | struct timespec ts; |
38 | struct timeval before, after; |
39 | int diff; |
40 | |
41 | gettimeofday (tv: &before, tz: 0); |
42 | ts.tv_sec = before.tv_sec + 1; |
43 | ts.tv_nsec = before.tv_usec * 1000; |
44 | |
45 | printf (format: "Thread %d starting wait @ %d\n" , pthread_self (), |
46 | (int) before.tv_sec); |
47 | |
48 | if (foo % 2 == 0) |
49 | err = pthread_rwlock_timedrdlock (rwlock: &rwlock, abstime: &ts); |
50 | else |
51 | err = pthread_rwlock_timedwrlock (rwlock: &rwlock, abstime: &ts); |
52 | |
53 | assert (err == ETIMEDOUT); |
54 | |
55 | gettimeofday (tv: &after, tz: 0); |
56 | |
57 | printf (format: "Thread %d ending wait @ %d\n" , pthread_self (), (int) after.tv_sec); |
58 | |
59 | diff = after.tv_sec * 1000000 + after.tv_usec |
60 | - before.tv_sec * 1000000 - before.tv_usec; |
61 | |
62 | if (diff < 900000 || diff > 1100000) |
63 | error (status: 1, errnum: EGRATUITOUS, format: "pthread_mutex_timedlock waited %d us" , diff); |
64 | |
65 | return 0; |
66 | } |
67 | |
68 | int |
69 | main (int argc, char **argv) |
70 | { |
71 | error_t err; |
72 | int i; |
73 | pthread_t tid[THREADS]; |
74 | |
75 | err = pthread_rwlock_init (rwlock: &rwlock, attr: 0); |
76 | if (err) |
77 | error (status: 1, errnum: err, format: "pthread_rwlock_init" ); |
78 | |
79 | /* Lock it so all the threads will block. */ |
80 | err = pthread_rwlock_wrlock (rwlock: &rwlock); |
81 | assert (err == 0); |
82 | |
83 | for (i = 0; i < THREADS; i++) |
84 | { |
85 | err = pthread_create (newthread: &tid[i], attr: 0, start_routine: test, arg: (void *) i); |
86 | if (err) |
87 | error (status: 1, errnum: err, format: "pthread_create" ); |
88 | } |
89 | |
90 | for (i = 0; i < THREADS; i++) |
91 | { |
92 | void *ret; |
93 | |
94 | err = pthread_join (th: tid[i], thread_return: &ret); |
95 | if (err) |
96 | error (status: 1, errnum: err, format: "pthread_join" ); |
97 | |
98 | assert (ret == 0); |
99 | } |
100 | |
101 | return 0; |
102 | } |
103 | |