FreeBSD/Linux Kernel Cross Reference
sys/sys/atomic.h
1 /* $NetBSD: atomic.h,v 1.10.10.1 2010/03/02 06:21:12 snj Exp $ */
2
3 /*-
4 * Copyright (c) 2007, 2008 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifndef _SYS_ATOMIC_H_
33 #define _SYS_ATOMIC_H_
34
35 #include <sys/types.h>
36 #if !defined(_KERNEL) && !defined(_STANDALONE)
37 #include <stdint.h>
38 #endif
39
40 __BEGIN_DECLS
41 /*
42 * Atomic ADD
43 */
44 void atomic_add_32(volatile uint32_t *, int32_t);
45 void atomic_add_int(volatile unsigned int *, int);
46 void atomic_add_long(volatile unsigned long *, long);
47 void atomic_add_ptr(volatile void *, ssize_t);
48 void atomic_add_64(volatile uint64_t *, int64_t);
49
50 uint32_t atomic_add_32_nv(volatile uint32_t *, int32_t);
51 unsigned int atomic_add_int_nv(volatile unsigned int *, int);
52 unsigned long atomic_add_long_nv(volatile unsigned long *, long);
53 void * atomic_add_ptr_nv(volatile void *, ssize_t);
54 uint64_t atomic_add_64_nv(volatile uint64_t *, int64_t);
55
56 /*
57 * Atomic AND
58 */
59 void atomic_and_32(volatile uint32_t *, uint32_t);
60 void atomic_and_uint(volatile unsigned int *, unsigned int);
61 void atomic_and_ulong(volatile unsigned long *, unsigned long);
62 void atomic_and_64(volatile uint64_t *, uint64_t);
63
64 uint32_t atomic_and_32_nv(volatile uint32_t *, uint32_t);
65 unsigned int atomic_and_uint_nv(volatile unsigned int *, unsigned int);
66 unsigned long atomic_and_ulong_nv(volatile unsigned long *, unsigned long);
67 uint64_t atomic_and_64_nv(volatile uint64_t *, uint64_t);
68
69 /*
70 * Atomic OR
71 */
72 void atomic_or_32(volatile uint32_t *, uint32_t);
73 void atomic_or_uint(volatile unsigned int *, unsigned int);
74 void atomic_or_ulong(volatile unsigned long *, unsigned long);
75 void atomic_or_64(volatile uint64_t *, uint64_t);
76
77 uint32_t atomic_or_32_nv(volatile uint32_t *, uint32_t);
78 unsigned int atomic_or_uint_nv(volatile unsigned int *, unsigned int);
79 unsigned long atomic_or_ulong_nv(volatile unsigned long *, unsigned long);
80 uint64_t atomic_or_64_nv(volatile uint64_t *, uint64_t);
81
82 /*
83 * Atomic COMPARE-AND-SWAP
84 */
85 uint32_t atomic_cas_32(volatile uint32_t *, uint32_t, uint32_t);
86 unsigned int atomic_cas_uint(volatile unsigned int *, unsigned int,
87 unsigned int);
88 unsigned long atomic_cas_ulong(volatile unsigned long *, unsigned long,
89 unsigned long);
90 void * atomic_cas_ptr(volatile void *, void *, void *);
91 uint64_t atomic_cas_64(volatile uint64_t *, uint64_t, uint64_t);
92
93 /*
94 * Non-interlocked atomic COMPARE-AND-SWAP.
95 */
96 uint32_t atomic_cas_32_ni(volatile uint32_t *, uint32_t, uint32_t);
97 unsigned int atomic_cas_uint_ni(volatile unsigned int *, unsigned int,
98 unsigned int);
99 unsigned long atomic_cas_ulong_ni(volatile unsigned long *, unsigned long,
100 unsigned long);
101 void * atomic_cas_ptr_ni(volatile void *, void *, void *);
102 uint64_t atomic_cas_64_ni(volatile uint64_t *, uint64_t, uint64_t);
103
104 /*
105 * Atomic SWAP
106 */
107 uint32_t atomic_swap_32(volatile uint32_t *, uint32_t);
108 unsigned int atomic_swap_uint(volatile unsigned int *, unsigned int);
109 unsigned long atomic_swap_ulong(volatile unsigned long *, unsigned long);
110 void * atomic_swap_ptr(volatile void *, void *);
111 uint64_t atomic_swap_64(volatile uint64_t *, uint64_t);
112
113 /*
114 * Atomic DECREMENT
115 */
116 void atomic_dec_32(volatile uint32_t *);
117 void atomic_dec_uint(volatile unsigned int *);
118 void atomic_dec_ulong(volatile unsigned long *);
119 void atomic_dec_ptr(volatile void *);
120 void atomic_dec_64(volatile uint64_t *);
121
122 uint32_t atomic_dec_32_nv(volatile uint32_t *);
123 unsigned int atomic_dec_uint_nv(volatile unsigned int *);
124 unsigned long atomic_dec_ulong_nv(volatile unsigned long *);
125 void * atomic_dec_ptr_nv(volatile void *);
126 uint64_t atomic_dec_64_nv(volatile uint64_t *);
127
128 /*
129 * Atomic INCREMENT
130 */
131 void atomic_inc_32(volatile uint32_t *);
132 void atomic_inc_uint(volatile unsigned int *);
133 void atomic_inc_ulong(volatile unsigned long *);
134 void atomic_inc_ptr(volatile void *);
135 void atomic_inc_64(volatile uint64_t *);
136
137 uint32_t atomic_inc_32_nv(volatile uint32_t *);
138 unsigned int atomic_inc_uint_nv(volatile unsigned int *);
139 unsigned long atomic_inc_ulong_nv(volatile unsigned long *);
140 void * atomic_inc_ptr_nv(volatile void *);
141 uint64_t atomic_inc_64_nv(volatile uint64_t *);
142
143 /*
144 * Memory barrier operations
145 */
146 void membar_enter(void);
147 void membar_exit(void);
148 void membar_producer(void);
149 void membar_consumer(void);
150 void membar_sync(void);
151
152 __END_DECLS
153
154 #endif /* ! _SYS_ATOMIC_H_ */
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