1 /* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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
7 License as published by the Free Software Foundation; either
8 version 2.1 of the 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; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
34 #if ! _POSIX_THREAD_PROCESS_SHARED
36 puts ("_POSIX_THREAD_PROCESS_SHARED not supported, test skipped");
41 size_t ps = sysconf (_SC_PAGESIZE);
42 char tmpfname[] = "/tmp/tst-rwlock4.XXXXXX";
47 pthread_rwlockattr_t a;
53 fd = mkstemp (tmpfname);
56 printf ("cannot open temporary file: %m\n");
60 /* Make sure it is always removed. */
63 /* Create one page of data. */
64 memset (data, '\0', ps);
66 /* Write the data to the file. */
67 if (write (fd, data, ps) != ps)
73 mem = mmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
74 if (mem == MAP_FAILED)
76 printf ("mmap failed: %m\n");
80 r = (pthread_rwlock_t *) (((uintptr_t) mem + __alignof (pthread_rwlock_t))
81 & ~(__alignof (pthread_rwlock_t) - 1));
84 if (pthread_rwlockattr_init (&a) != 0)
86 puts ("rwlockattr_init failed");
90 if (pthread_rwlockattr_getpshared (&a, &s) != 0)
92 puts ("1st rwlockattr_getpshared failed");
96 if (s != PTHREAD_PROCESS_PRIVATE)
98 puts ("default pshared value wrong");
102 if (pthread_rwlockattr_setpshared (&a, PTHREAD_PROCESS_SHARED) != 0)
104 puts ("rwlockattr_setpshared failed");
108 if (pthread_rwlockattr_getpshared (&a, &s) != 0)
110 puts ("2nd rwlockattr_getpshared failed");
114 if (s != PTHREAD_PROCESS_SHARED)
116 puts ("pshared value after setpshared call wrong");
120 if (pthread_rwlock_init (r, &a) != 0)
122 puts ("rwlock_init failed");
126 if (pthread_rwlock_rdlock (r) != 0)
128 puts ("rwlock_rdlock failed");
132 if (pthread_rwlockattr_destroy (&a) != 0)
134 puts ("rwlockattr_destroy failed");
138 err = pthread_rwlock_trywrlock (r);
141 puts ("rwlock_trywrlock succeeded");
144 else if (err != EBUSY)
146 puts ("rwlock_trywrlock didn't return EBUSY");
152 puts ("going to fork now");
156 puts ("fork failed");
161 /* Play some lock ping-pong. It's our turn to unlock first. */
164 puts ("child: *p != 0");
168 if (pthread_rwlock_unlock (r) != 0)
170 puts ("child: 1st rwlock_unlock failed");
178 if (pthread_rwlock_wrlock (r) != 0)
180 puts ("parent: rwlock_wrlock failed");
190 puts ("parent done");
197 #define TEST_FUNCTION do_test ()
198 #include "../test-skeleton.c"