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47677f2e | 1 | /* Test sem_wait cancellation for contended case. |
d614a753 | 2 | Copyright (C) 2003-2020 Free Software Foundation, Inc. |
7726edc2 UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2003. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Lesser General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 17 | License along with the GNU C Library; if not, see |
5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
7726edc2 UD |
19 | |
20 | #include <errno.h> | |
21 | #include <pthread.h> | |
22 | #include <semaphore.h> | |
23 | #include <stdio.h> | |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | #include <unistd.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 ("second call to cleanup"); | |
41 | exit (1); | |
42 | } | |
7726edc2 UD |
43 | } |
44 | ||
45 | ||
46 | static void * | |
47 | tf (void *arg) | |
48 | { | |
49 | pthread_cleanup_push (cleanup, NULL); | |
50 | ||
51 | int e = pthread_barrier_wait (&bar); | |
52 | if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) | |
53 | { | |
47677f2e | 54 | puts ("error: tf: 1st barrier_wait failed"); |
7726edc2 UD |
55 | exit (1); |
56 | } | |
57 | ||
58 | /* This call should block and be cancelable. */ | |
59 | sem_wait (&sem); | |
60 | ||
61 | pthread_cleanup_pop (0); | |
62 | ||
7726edc2 UD |
63 | return NULL; |
64 | } | |
65 | ||
66 | ||
67 | static int | |
68 | do_test (void) | |
69 | { | |
70 | pthread_t th; | |
71 | ||
72 | if (pthread_barrier_init (&bar, NULL, 2) != 0) | |
73 | { | |
47677f2e | 74 | puts ("error: barrier_init failed"); |
7726edc2 UD |
75 | exit (1); |
76 | } | |
77 | ||
47677f2e AZ |
78 | /* A value equal to 0 will check for contended pthread cancellation, |
79 | where the sem_wait operation will block. */ | |
7726edc2 UD |
80 | if (sem_init (&sem, 0, 0) != 0) |
81 | { | |
47677f2e | 82 | puts ("error: sem_init failed"); |
7726edc2 UD |
83 | exit (1); |
84 | } | |
85 | ||
86 | if (pthread_create (&th, NULL, tf, NULL) != 0) | |
87 | { | |
47677f2e | 88 | puts ("error: create failed"); |
7726edc2 UD |
89 | exit (1); |
90 | } | |
91 | ||
92 | int e = pthread_barrier_wait (&bar); | |
93 | if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) | |
94 | { | |
47677f2e | 95 | puts ("error: 1st barrier_wait failed"); |
7726edc2 UD |
96 | exit (1); |
97 | } | |
98 | ||
99 | /* Give the child a chance to go to sleep in sem_wait. */ | |
100 | sleep (1); | |
101 | ||
102 | /* Check whether cancellation is honored when waiting in sem_wait. */ | |
103 | if (pthread_cancel (th) != 0) | |
104 | { | |
47677f2e | 105 | puts ("error: 1st cancel failed"); |
7726edc2 UD |
106 | exit (1); |
107 | } | |
108 | ||
109 | void *r; | |
110 | if (pthread_join (th, &r) != 0) | |
111 | { | |
47677f2e | 112 | puts ("error: join failed"); |
7726edc2 UD |
113 | exit (1); |
114 | } | |
115 | ||
116 | if (r != PTHREAD_CANCELED) | |
117 | { | |
118 | puts ("thread not canceled"); | |
119 | exit (1); | |
120 | } | |
121 | ||
122 | return 0; | |
123 | } | |
124 | ||
125 | ||
126 | #define TEST_FUNCTION do_test () | |
127 | #include "../test-skeleton.c" |