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("$FreeBSD$");
32
33 #include <stdio.h>
34
35 #include "spinlock.h"
36 #include "libc_private.h"
37
38 long _atomic_lock_stub(volatile long *);
39 void _spinlock_stub(spinlock_t *);
40 void _spinunlock_stub(spinlock_t *);
41
42 __weak_reference(_atomic_lock_stub, _atomic_lock);
43
44 long
_atomic_lock_stub(volatile long * lck __unused)45 _atomic_lock_stub(volatile long *lck __unused)
46 {
47 return (0L);
48 }
49
50 #pragma weak _spinlock
51 void
_spinlock(spinlock_t * lck)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
61 void
_spinunlock(spinlock_t * lck)62 _spinunlock(spinlock_t *lck)
63 {
64
65 ((void (*)(spinlock_t *lck))__libc_interposing[INTERPOS_spinunlock])
66 (lck);
67
68 }
69
70 void
__libc_spinlock_stub(spinlock_t * lck __unused)71 __libc_spinlock_stub(spinlock_t *lck __unused)
72 {
73 }
74
75 void
__libc_spinunlock_stub(spinlock_t * lck __unused)76 __libc_spinunlock_stub(spinlock_t *lck __unused)
77 {
78 }
79