1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the author nor the names of any co-contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <stdio.h>
33
34 #include "spinlock.h"
35 #include "libc_private.h"
36
37 long _atomic_lock_stub(volatile long *);
38 void _spinlock_stub(spinlock_t *);
39 void _spinunlock_stub(spinlock_t *);
40
41 __weak_reference(_atomic_lock_stub, _atomic_lock);
42
43 long
_atomic_lock_stub(volatile long * lck __unused)44 _atomic_lock_stub(volatile long *lck __unused)
45 {
46 return (0L);
47 }
48
49 #pragma weak _spinlock
50 void
_spinlock(spinlock_t * lck)51 _spinlock(spinlock_t *lck)
52 {
53
54 ((void (*)(spinlock_t *lck))__libc_interposing[INTERPOS_spinlock])
55 (lck);
56
57 }
58
59 #pragma weak _spinunlock
60 void
_spinunlock(spinlock_t * lck)61 _spinunlock(spinlock_t *lck)
62 {
63
64 ((void (*)(spinlock_t *lck))__libc_interposing[INTERPOS_spinunlock])
65 (lck);
66
67 }
68
69 void
__libc_spinlock_stub(spinlock_t * lck __unused)70 __libc_spinlock_stub(spinlock_t *lck __unused)
71 {
72 }
73
74 void
__libc_spinunlock_stub(spinlock_t * lck __unused)75 __libc_spinunlock_stub(spinlock_t *lck __unused)
76 {
77 }
78