atomic.h revision 271003 
1/*-
2 * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: stable/10/sys/cddl/compat/opensolaris/sys/atomic.h 271003 2014-09-03 08:24:11Z delphij $
27 */
28
29#ifndef _OPENSOLARIS_SYS_ATOMIC_H_
30#define	_OPENSOLARIS_SYS_ATOMIC_H_
31
32#include <sys/types.h>
33#include <machine/atomic.h>
34
35#define	casptr(_a, _b, _c)	\
36	atomic_cmpset_ptr((volatile uintptr_t *)(_a), (uintptr_t)(_b), (uintptr_t) (_c))
37#define cas32	atomic_cmpset_32
38
39#if !defined(__LP64__) && !defined(__mips_n32) && !defined(ARM_HAVE_ATOMIC64)
40extern void atomic_add_64(volatile uint64_t *target, int64_t delta);
41extern void atomic_dec_64(volatile uint64_t *target);
42#endif
43#ifndef __sparc64__
44extern uint32_t atomic_cas_32(volatile uint32_t *target, uint32_t cmp,
45    uint32_t newval);
46extern uint64_t atomic_cas_64(volatile uint64_t *target, uint64_t cmp,
47    uint64_t newval);
48#endif
49extern uint64_t atomic_add_64_nv(volatile uint64_t *target, int64_t delta);
50extern uint8_t atomic_or_8_nv(volatile uint8_t *target, uint8_t value);
51extern void membar_producer(void);
52
53#if defined(__sparc64__) || defined(__powerpc__) || defined(__arm__) || \
54    defined(__mips__)
55extern void atomic_or_8(volatile uint8_t *target, uint8_t value);
56#else
57static __inline void
58atomic_or_8(volatile uint8_t *target, uint8_t value)
59{
60	atomic_set_8(target, value);
61}
62#endif
63
64static __inline uint32_t
65atomic_add_32_nv(volatile uint32_t *target, int32_t delta)
66{
67	return (atomic_fetchadd_32(target, delta) + delta);
68}
69
70static __inline u_int
71atomic_add_int_nv(volatile u_int *target, int delta)
72{
73	return (atomic_add_32_nv(target, delta));
74}
75
76static __inline void
77atomic_dec_32(volatile uint32_t *target)
78{
79	atomic_subtract_32(target, 1);
80}
81
82static __inline uint32_t
83atomic_dec_32_nv(volatile uint32_t *target)
84{
85	return (atomic_fetchadd_32(target, -1) - 1);
86}
87
88#if defined(__LP64__) || defined(__mips_n32) || defined(ARM_HAVE_ATOMIC64)
89static __inline void
90atomic_dec_64(volatile uint64_t *target)
91{
92	atomic_subtract_64(target, 1);
93}
94#endif
95
96static __inline void
97atomic_inc_32(volatile uint32_t *target)
98{
99	atomic_add_32(target, 1);
100}
101
102static __inline uint32_t
103atomic_inc_32_nv(volatile uint32_t *target)
104{
105	return (atomic_add_32_nv(target, 1));
106}
107
108static __inline void
109atomic_inc_64(volatile uint64_t *target)
110{
111	atomic_add_64(target, 1);
112}
113
114static __inline uint64_t
115atomic_inc_64_nv(volatile uint64_t *target)
116{
117	return (atomic_add_64_nv(target, 1));
118}
119
120static __inline uint64_t
121atomic_dec_64_nv(volatile uint64_t *target)
122{
123	return (atomic_add_64_nv(target, -1));
124}
125
126#if !defined(COMPAT_32BIT) && defined(__LP64__)
127static __inline void *
128atomic_cas_ptr(volatile void *target, void *cmp,  void *newval)
129{
130	return ((void *)atomic_cas_64((volatile uint64_t *)target,
131	    (uint64_t)cmp, (uint64_t)newval));
132}
133#else
134static __inline void *
135atomic_cas_ptr(volatile void *target, void *cmp,  void *newval)
136{
137	return ((void *)atomic_cas_32((volatile uint32_t *)target,
138	    (uint32_t)cmp, (uint32_t)newval));
139}
140#endif	/* !defined(COMPAT_32BIT) && defined(__LP64__) */
141
142#endif	/* !_OPENSOLARIS_SYS_ATOMIC_H_ */
143