1 /* Test program for timedout read/write lock functions.
2 Copyright (C) 2000-2015 Free Software Foundation, Inc.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2000.
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 License as
7 published by the Free Software Foundation; either version 2.1 of the
8 License, or (at your option) any later version.
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.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If
17 not, see <http://www.gnu.org/licenses/>. */
36 # define INIT PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP
39 static pthread_rwlock_t lock = INIT;
43 writer_thread (void *nr)
45 struct timespec delay;
49 delay.tv_nsec = DELAY;
51 for (n = 0; n < WRITETRIES; ++n)
53 printf ("writer thread %ld tries again\n", (long int) nr);
55 if (pthread_rwlock_wrlock (&lock) != 0)
57 puts ("wrlock failed");
61 printf ("writer thread %ld succeeded\n", (long int) nr);
63 nanosleep (&delay, NULL);
65 if (pthread_rwlock_unlock (&lock) != 0)
67 puts ("unlock for writer failed");
71 printf ("writer thread %ld released\n", (long int) nr);
79 reader_thread (void *nr)
81 struct timespec delay;
85 delay.tv_nsec = DELAY;
87 for (n = 0; n < READTRIES; ++n)
89 printf ("reader thread %ld tries again\n", (long int) nr);
91 if (pthread_rwlock_rdlock (&lock) != 0)
93 puts ("rdlock failed");
97 printf ("reader thread %ld succeeded\n", (long int) nr);
99 nanosleep (&delay, NULL);
101 if (pthread_rwlock_unlock (&lock) != 0)
103 puts ("unlock for reader failed");
107 printf ("reader thread %ld released\n", (long int) nr);
117 pthread_t thwr[NWRITERS];
118 pthread_t thrd[NREADERS];
122 /* Make standard error the same as standard output. */
125 /* Make sure we see all message, even those on stdout. */
126 setvbuf (stdout, NULL, _IONBF, 0);
128 for (n = 0; n < NWRITERS; ++n)
129 if (pthread_create (&thwr[n], NULL, writer_thread,
130 (void *) (long int) n) != 0)
132 puts ("writer create failed");
136 for (n = 0; n < NREADERS; ++n)
137 if (pthread_create (&thrd[n], NULL, reader_thread,
138 (void *) (long int) n) != 0)
140 puts ("reader create failed");
144 /* Wait for all the threads. */
145 for (n = 0; n < NWRITERS; ++n)
146 if (pthread_join (thwr[n], &res) != 0)
148 puts ("writer join failed");
151 for (n = 0; n < NREADERS; ++n)
152 if (pthread_join (thrd[n], &res) != 0)
154 puts ("reader join failed");
162 #define TEST_FUNCTION do_test ()
163 #include "../test-skeleton.c"