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-spin2.XXXXXX";
39 pthread_spinlock_t *s;
44 fd = mkstemp (tmpfname);
47 printf ("cannot open temporary file: %m\n");
51 /* Make sure it is always removed. */
54 /* Create one page of data. */
55 memset (data, '\0', ps);
57 /* Write the data to the file. */
58 if (write (fd, data, ps) != (ssize_t) ps)
64 mem = mmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
65 if (mem == MAP_FAILED)
67 printf ("mmap failed: %m\n");
71 s = (pthread_spinlock_t *) (((uintptr_t) mem
72 + __alignof (pthread_spinlock_t))
73 & ~(__alignof (pthread_spinlock_t) - 1));
76 if (pthread_spin_init (s, PTHREAD_PROCESS_SHARED) != 0)
78 puts ("spin_init failed");
82 if (pthread_spin_lock (s) != 0)
84 puts ("spin_lock failed");
88 err = pthread_spin_trylock (s);
91 puts ("1st spin_trylock succeeded");
94 else if (err != EBUSY)
96 puts ("1st spin_trylock didn't return EBUSY");
100 err = pthread_spin_unlock (s);
103 puts ("parent: spin_unlock failed");
107 err = pthread_spin_trylock (s);
110 puts ("2nd spin_trylock failed");
116 puts ("going to fork now");
120 puts ("fork failed");
125 /* Play some lock ping-pong. It's our turn to unlock first. */
128 puts ("child: *p != 0");
132 if (pthread_spin_unlock (s) != 0)
134 puts ("child: 1st spin_unlock failed");
142 if (pthread_spin_lock (s) != 0)
144 puts ("parent: 2nd spin_lock failed");
148 puts ("waiting for child");
150 waitpid (pid, NULL, 0);
152 puts ("parent done");
158 #define TEST_FUNCTION do_test ()
159 #include "../test-skeleton.c"