atomic_simplelock.c revision 1.2 
1/*-
2 * Copyright (c) 2013 The NetBSD Foundation, Inc.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to The NetBSD Foundation
6 * by Matt Thomas of 3am Software Foundry.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__RCSID("$NetBSD: atomic_simplelock.c,v 1.2 2013/08/16 01:47:41 matt Exp $");
32
33#include <sys/types.h>
34
35#if !defined(_ARM_ARCH_T2)
36/*
37 * We need to use the inlines so redefine out of the way.
38 */
39#define	__cpu_simple_lock	__arm_simple_lock
40#define	__cpu_simple_lock_try	__arm_simple_lock_try
41#include <arm/lock.h>
42/*
43 * Now get rid of them.
44 */
45#undef __cpu_simple_lock
46#undef __cpu_simple_lock_try
47
48/*
49 * Since we overrode lock.h we have to provide these ourselves.
50 */
51#ifdef __LIBPTHREAD_SOURCE__
52__dso_hidden void __cpu_simple_lock(__cpu_simple_lock_t *);
53__dso_hidden int __cpu_simple_lock_try(__cpu_simple_lock_t *);
54#else
55void __cpu_simple_lock(__cpu_simple_lock_t *);
56int __cpu_simple_lock_try(__cpu_simple_lock_t *);
57#endif
58
59void
60__cpu_simple_lock(__cpu_simple_lock_t *alp)
61{
62
63	__arm_simple_lock(alp);
64}
65
66int
67__cpu_simple_lock_try(__cpu_simple_lock_t *alp)
68{
69
70	return __arm_simple_lock_try(alp);
71}
72#endif
73