Mark lseek/llseek as non-cancellable
[glibc.git] / nptl / tst-rwlock9.c
blobe7cf7314a4c6768456b56691217d5b8685a0aec1
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/>. */
19 #include <errno.h>
20 #include <error.h>
21 #include <pthread.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <time.h>
25 #include <unistd.h>
26 #include <sys/time.h>
29 #define NWRITERS 15
30 #define WRITETRIES 10
31 #define NREADERS 15
32 #define READTRIES 15
34 #define TIMEOUT 1000000
35 #define DELAY 1000000
37 #ifndef INIT
38 # define INIT PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP
39 #endif
41 static pthread_rwlock_t lock = INIT;
44 static void *
45 writer_thread (void *nr)
47 struct timespec ts;
48 struct timespec delay;
49 int n;
51 delay.tv_sec = 0;
52 delay.tv_nsec = DELAY;
54 for (n = 0; n < WRITETRIES; ++n)
56 int e;
59 struct timeval tv;
60 (void) gettimeofday (&tv, NULL);
61 TIMEVAL_TO_TIMESPEC (&tv, &ts);
63 ts.tv_nsec += 2 * TIMEOUT;
64 if (ts.tv_nsec >= 1000000000)
66 ts.tv_nsec -= 1000000000;
67 ++ts.tv_sec;
70 printf ("writer thread %ld tries again\n", (long int) nr);
72 e = pthread_rwlock_timedwrlock (&lock, &ts);
73 if (e != 0 && e != ETIMEDOUT)
75 puts ("timedwrlock failed");
76 exit (1);
79 while (e == ETIMEDOUT);
81 printf ("writer thread %ld succeeded\n", (long int) nr);
83 nanosleep (&delay, NULL);
85 if (pthread_rwlock_unlock (&lock) != 0)
87 puts ("unlock for writer failed");
88 exit (1);
91 printf ("writer thread %ld released\n", (long int) nr);
94 return NULL;
98 static void *
99 reader_thread (void *nr)
101 struct timespec ts;
102 struct timespec delay;
103 int n;
105 delay.tv_sec = 0;
106 delay.tv_nsec = DELAY;
108 for (n = 0; n < READTRIES; ++n)
110 int e;
113 struct timeval tv;
114 (void) gettimeofday (&tv, NULL);
115 TIMEVAL_TO_TIMESPEC (&tv, &ts);
117 ts.tv_nsec += TIMEOUT;
118 if (ts.tv_nsec >= 1000000000)
120 ts.tv_nsec -= 1000000000;
121 ++ts.tv_sec;
124 printf ("reader thread %ld tries again\n", (long int) nr);
126 e = pthread_rwlock_timedrdlock (&lock, &ts);
127 if (e != 0 && e != ETIMEDOUT)
129 puts ("timedrdlock failed");
130 exit (1);
133 while (e == ETIMEDOUT);
135 printf ("reader thread %ld succeeded\n", (long int) nr);
137 nanosleep (&delay, NULL);
139 if (pthread_rwlock_unlock (&lock) != 0)
141 puts ("unlock for reader failed");
142 exit (1);
145 printf ("reader thread %ld released\n", (long int) nr);
148 return NULL;
152 static int
153 do_test (void)
155 pthread_t thwr[NWRITERS];
156 pthread_t thrd[NREADERS];
157 int n;
158 void *res;
160 /* Make standard error the same as standard output. */
161 dup2 (1, 2);
163 /* Make sure we see all message, even those on stdout. */
164 setvbuf (stdout, NULL, _IONBF, 0);
166 for (n = 0; n < NWRITERS; ++n)
167 if (pthread_create (&thwr[n], NULL, writer_thread,
168 (void *) (long int) n) != 0)
170 puts ("writer create failed");
171 exit (1);
174 for (n = 0; n < NREADERS; ++n)
175 if (pthread_create (&thrd[n], NULL, reader_thread,
176 (void *) (long int) n) != 0)
178 puts ("reader create failed");
179 exit (1);
182 /* Wait for all the threads. */
183 for (n = 0; n < NWRITERS; ++n)
184 if (pthread_join (thwr[n], &res) != 0)
186 puts ("writer join failed");
187 exit (1);
189 for (n = 0; n < NREADERS; ++n)
190 if (pthread_join (thrd[n], &res) != 0)
192 puts ("reader join failed");
193 exit (1);
196 return 0;
199 #undef TIMEOUT
200 #define TIMEOUT 30
201 #define TEST_FUNCTION do_test ()
202 #include "../test-skeleton.c"