1 | /* Copyright (C) 2002-2024 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 <stdio.h> |
21 | #include <stdlib.h> |
22 | #include <string.h> |
23 | #include <time.h> |
24 | |
25 | |
26 | static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; |
27 | |
28 | |
29 | static void * |
30 | tf (void *arg) |
31 | { |
32 | if (pthread_mutex_lock (mutex: &lock) != 0) |
33 | { |
34 | puts (s: "child: mutex_lock failed" ); |
35 | return NULL; |
36 | } |
37 | |
38 | return (void *) 42l; |
39 | } |
40 | |
41 | |
42 | static int |
43 | do_test (void) |
44 | { |
45 | pthread_t th; |
46 | |
47 | if (pthread_mutex_lock (mutex: &lock) != 0) |
48 | { |
49 | puts (s: "mutex_lock failed" ); |
50 | exit (1); |
51 | } |
52 | |
53 | if (pthread_create (newthread: &th, NULL, start_routine: tf, NULL) != 0) |
54 | { |
55 | puts (s: "mutex_create failed" ); |
56 | exit (1); |
57 | } |
58 | |
59 | void *status; |
60 | int val = pthread_tryjoin_np (th: th, thread_return: &status); |
61 | if (val == 0) |
62 | { |
63 | puts (s: "1st tryjoin succeeded" ); |
64 | exit (1); |
65 | } |
66 | else if (val != EBUSY) |
67 | { |
68 | puts (s: "1st tryjoin didn't return EBUSY" ); |
69 | exit (1); |
70 | } |
71 | |
72 | if (pthread_mutex_unlock (mutex: &lock) != 0) |
73 | { |
74 | puts (s: "mutex_unlock failed" ); |
75 | exit (1); |
76 | } |
77 | |
78 | while ((val = pthread_tryjoin_np (th: th, thread_return: &status)) != 0) |
79 | { |
80 | if (val != EBUSY) |
81 | { |
82 | printf (format: "tryjoin returned %s (%d), expected only 0 or EBUSY\n" , |
83 | strerror (errnum: val), val); |
84 | exit (1); |
85 | } |
86 | |
87 | /* Delay minimally. */ |
88 | struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 }; |
89 | nanosleep (requested_time: &ts, NULL); |
90 | } |
91 | |
92 | if (status != (void *) 42l) |
93 | { |
94 | printf (format: "return value %p, expected %p\n" , status, (void *) 42l); |
95 | exit (1); |
96 | } |
97 | |
98 | return 0; |
99 | } |
100 | |
101 | #define TEST_FUNCTION do_test () |
102 | #include "../test-skeleton.c" |
103 | |