_spinlock_stub.c revision 319442 
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. Neither the name of the author nor the names of any co-contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD: stable/11/lib/libc/gen/_spinlock_stub.c 319442 2017-06-01 16:03:01Z vangyzen $");
32
33#include <stdio.h>
34
35#include "spinlock.h"
36#include "libc_private.h"
37
38long _atomic_lock_stub(volatile long *);
39void _spinlock_stub(spinlock_t *);
40void _spinunlock_stub(spinlock_t *);
41
42__weak_reference(_atomic_lock_stub, _atomic_lock);
43
44long
45_atomic_lock_stub(volatile long *lck __unused)
46{
47	return (0L);
48}
49
50#pragma weak _spinlock
51void
52_spinlock(spinlock_t *lck)
53{
54
55	((void (*)(spinlock_t *lck))__libc_interposing[INTERPOS_spinlock])
56	    (lck);
57
58}
59
60#pragma weak _spinunlock
61void
62_spinunlock(spinlock_t *lck)
63{
64
65	((void (*)(spinlock_t *lck))__libc_interposing[INTERPOS_spinunlock])
66	    (lck);
67
68}
69
70void
71__libc_spinlock_stub(spinlock_t *lck __unused)
72{
73}
74
75void
76__libc_spinunlock_stub(spinlock_t *lck __unused)
77{
78}
79