1 /* Copyright (C) 2002, 2003, 2004 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 size_t ps = sysconf (_SC_PAGESIZE);
35 char tmpfname[] = "/tmp/tst-mutex4.XXXXXX";
40 pthread_mutexattr_t a;
46 fd = mkstemp (tmpfname);
49 printf ("cannot open temporary file: %m\n");
53 /* Make sure it is always removed. */
56 /* Create one page of data. */
57 memset (data, '\0', ps);
59 /* Write the data to the file. */
60 if (write (fd, data, ps) != (ssize_t) ps)
66 mem = mmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
67 if (mem == MAP_FAILED)
69 printf ("mmap failed: %m\n");
73 m = (pthread_mutex_t *) (((uintptr_t) mem + __alignof (pthread_mutex_t))
74 & ~(__alignof (pthread_mutex_t) - 1));
77 if (pthread_mutexattr_init (&a) != 0)
79 puts ("mutexattr_init failed");
83 if (pthread_mutexattr_getpshared (&a, &s) != 0)
85 puts ("1st mutexattr_getpshared failed");
89 if (s != PTHREAD_PROCESS_PRIVATE)
91 puts ("default pshared value wrong");
95 if (pthread_mutexattr_setpshared (&a, PTHREAD_PROCESS_SHARED) != 0)
97 puts ("mutexattr_setpshared failed");
101 if (pthread_mutexattr_getpshared (&a, &s) != 0)
103 puts ("2nd mutexattr_getpshared failed");
107 if (s != PTHREAD_PROCESS_SHARED)
109 puts ("pshared value after setpshared call wrong");
113 if (pthread_mutex_init (m, &a) != 0)
115 puts ("mutex_init failed");
119 if (pthread_mutex_lock (m) != 0)
121 puts ("mutex_lock failed");
125 if (pthread_mutexattr_destroy (&a) != 0)
127 puts ("mutexattr_destroy failed");
131 err = pthread_mutex_trylock (m);
134 puts ("mutex_trylock succeeded");
137 else if (err != EBUSY)
139 puts ("mutex_trylock didn't return EBUSY");
145 puts ("going to fork now");
149 puts ("fork failed");
154 /* Play some lock ping-pong. It's our turn to unlock first. */
157 puts ("child: *p != 0");
161 if (pthread_mutex_unlock (m) != 0)
163 puts ("child: 1st mutex_unlock failed");
171 if (pthread_mutex_lock (m) != 0)
173 puts ("parent: 2nd mutex_lock failed");
183 puts ("parent done");
190 #define TEST_FUNCTION do_test ()
191 #include "../test-skeleton.c"