_spinlock_stub.c revision 75368 
1/*
2 * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by John Birrell.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $FreeBSD: head/lib/libc/gen/_spinlock_stub.c 75368 2001-04-10 04:11:50Z deischen $
33 *
34 */
35
36#include <stdio.h>
37
38#include "spinlock.h"
39
40/*
41 * Declare weak definitions in case the application is not linked
42 * with libpthread.
43 */
44__weak_reference(_atomic_lock_stub, _atomic_lock);
45__weak_reference(_spinlock_stub, _spinlock);
46__weak_reference(_spinlock_debug_stub, _spinlock_debug);
47
48
49/*
50 * This function is a stub for the _atomic_lock function in libpthread.
51 */
52long
53_atomic_lock_stub(volatile long *lck)
54{
55	return (0L);
56}
57
58
59/*
60 * This function is a stub for the spinlock function in libpthread.
61 */
62void
63_spinlock_stub(spinlock_t *lck)
64{
65}
66
67/*
68 * This function is a stub for the debug spinlock function in libpthread.
69 */
70void
71_spinlock_debug_stub(spinlock_t *lck, char *fname, int lineno)
72{
73}
74