1 | /* Copyright (C) 2004-2024 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 <limits.h> |
20 | #include <fcntl.h> |
21 | #include <pthread.h> |
22 | #include <stdbool.h> |
23 | #include <stdlib.h> |
24 | #include <stdio.h> |
25 | #include <unistd.h> |
26 | |
27 | #include <support/xunistd.h> |
28 | |
29 | pthread_cond_t cv = PTHREAD_COND_INITIALIZER; |
30 | pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER; |
31 | bool exiting; |
32 | int fd, spins, nn; |
33 | enum { count = 8 }; /* Number of worker threads. */ |
34 | |
35 | void * |
36 | tf (void *id) |
37 | { |
38 | pthread_mutex_lock (mutex: &lock); |
39 | |
40 | if ((long) id == 0) |
41 | { |
42 | while (!exiting) |
43 | { |
44 | if ((spins++ % 1000) == 0) |
45 | xwrite (fd, "." , 1); |
46 | pthread_mutex_unlock (mutex: &lock); |
47 | |
48 | pthread_mutex_lock (mutex: &lock); |
49 | int njobs = rand () % (count + 1); |
50 | nn = njobs; |
51 | if ((rand () % 30) == 0) |
52 | pthread_cond_broadcast (cond: &cv); |
53 | else |
54 | while (njobs--) |
55 | pthread_cond_signal (cond: &cv); |
56 | } |
57 | |
58 | pthread_cond_broadcast (cond: &cv); |
59 | } |
60 | else |
61 | { |
62 | while (!exiting) |
63 | { |
64 | while (!nn && !exiting) |
65 | pthread_cond_wait (cond: &cv, mutex: &lock); |
66 | --nn; |
67 | pthread_mutex_unlock (mutex: &lock); |
68 | |
69 | pthread_mutex_lock (mutex: &lock); |
70 | } |
71 | } |
72 | |
73 | pthread_mutex_unlock (mutex: &lock); |
74 | return NULL; |
75 | } |
76 | |
77 | int |
78 | do_test (void) |
79 | { |
80 | fd = open (file: "/dev/null" , O_WRONLY); |
81 | if (fd < 0) |
82 | { |
83 | printf (format: "couldn't open /dev/null, %m\n" ); |
84 | return 1; |
85 | } |
86 | |
87 | pthread_t th[count + 1]; |
88 | pthread_attr_t attr; |
89 | int i, ret, sz; |
90 | pthread_attr_init (attr: &attr); |
91 | sz = sysconf (_SC_PAGESIZE); |
92 | #ifdef PTHREAD_STACK_MIN |
93 | if (sz < PTHREAD_STACK_MIN) |
94 | sz = PTHREAD_STACK_MIN; |
95 | #endif |
96 | pthread_attr_setstacksize (attr: &attr, stacksize: sz); |
97 | |
98 | for (i = 0; i <= count; ++i) |
99 | if ((ret = pthread_create (newthread: &th[i], attr: &attr, start_routine: tf, arg: (void *) (long) i)) != 0) |
100 | { |
101 | errno = ret; |
102 | printf (format: "pthread_create %d failed: %m\n" , i); |
103 | return 1; |
104 | } |
105 | |
106 | struct timespec ts = { .tv_sec = 20, .tv_nsec = 0 }; |
107 | while (nanosleep (requested_time: &ts, remaining: &ts) != 0); |
108 | |
109 | pthread_mutex_lock (mutex: &lock); |
110 | exiting = true; |
111 | pthread_mutex_unlock (mutex: &lock); |
112 | |
113 | for (i = 0; i < count; ++i) |
114 | pthread_join (th: th[i], NULL); |
115 | |
116 | close (fd: fd); |
117 | return 0; |
118 | } |
119 | |
120 | #define TEST_FUNCTION do_test () |
121 | #define TIMEOUT 40 |
122 | #include "../test-skeleton.c" |
123 | |