1 /* Copyright (C) 2003-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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, see
17 <http://www.gnu.org/licenses/>. */
29 #include <support/check.h>
30 #include <support/timespec.h>
31 #include <support/xunistd.h>
37 size_t ps = sysconf (_SC_PAGESIZE);
38 char tmpfname[] = "/tmp/tst-mutex9.XXXXXX";
43 pthread_mutexattr_t a;
46 fd = mkstemp (tmpfname);
48 FAIL_EXIT1 ("cannot open temporary file: %m\n");
50 /* Make sure it is always removed. */
53 /* Create one page of data. */
54 memset (data, '\0', ps);
56 /* Write the data to the file. */
57 xwrite (fd, data, ps);
59 mem = xmmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd);
61 m = (pthread_mutex_t *) (((uintptr_t) mem + __alignof (pthread_mutex_t))
62 & ~(__alignof (pthread_mutex_t) - 1));
64 TEST_COMPARE (pthread_mutexattr_init (&a), 0);
66 TEST_COMPARE (pthread_mutexattr_setpshared (&a, PTHREAD_PROCESS_SHARED), 0);
68 TEST_COMPARE (pthread_mutexattr_settype (&a, PTHREAD_MUTEX_RECURSIVE), 0);
71 TEST_COMPARE (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_INHERIT), 0);
75 if ((e = pthread_mutex_init (m, &a)) != 0)
79 FAIL_UNSUPPORTED ("PI mutexes unsupported");
81 FAIL_EXIT1 ("mutex_init failed");
84 TEST_COMPARE (pthread_mutex_lock (m), 0);
86 TEST_COMPARE (pthread_mutexattr_destroy (&a), 0);
88 puts ("going to fork now");
92 if (pthread_mutex_trylock (m) == 0)
93 FAIL_EXIT1 ("child: mutex_trylock succeeded");
95 if (pthread_mutex_unlock (m) == 0)
96 FAIL_EXIT1 ("child: mutex_unlock succeeded");
98 const struct timespec ts = timespec_add (xclock_now (CLOCK_REALTIME),
99 make_timespec (0, 500000000));
101 TEST_COMPARE (pthread_mutex_timedlock (m, &ts), ETIMEDOUT);
105 pthread_mutex_lock (m);
107 puts ("child: mutex_lock returned");
115 if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
116 FAIL_EXIT1 ("waitpid failed");
117 if (! WIFSIGNALED (status))
118 FAIL_EXIT1 ("child not killed by signal");
119 TEST_COMPARE (WTERMSIG (status), SIGALRM);
124 #include <support/test-driver.c>