1 | /* $NetBSD: atomic.h,v 1.13 2015/01/08 22:27:18 riastradh 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 | * This operations will be provided for userland, but may not be |
95 | * implemented efficiently. |
96 | */ |
97 | uint16_t atomic_cas_16(volatile uint16_t *, uint16_t, uint16_t); |
98 | uint8_t atomic_cas_8(volatile uint8_t *, uint8_t, uint8_t); |
99 | |
100 | /* |
101 | * Non-interlocked atomic COMPARE-AND-SWAP. |
102 | */ |
103 | uint32_t atomic_cas_32_ni(volatile uint32_t *, uint32_t, uint32_t); |
104 | unsigned int atomic_cas_uint_ni(volatile unsigned int *, unsigned int, |
105 | unsigned int); |
106 | unsigned long atomic_cas_ulong_ni(volatile unsigned long *, unsigned long, |
107 | unsigned long); |
108 | void * atomic_cas_ptr_ni(volatile void *, void *, void *); |
109 | uint64_t atomic_cas_64_ni(volatile uint64_t *, uint64_t, uint64_t); |
110 | |
111 | /* |
112 | * Atomic SWAP |
113 | */ |
114 | uint32_t atomic_swap_32(volatile uint32_t *, uint32_t); |
115 | unsigned int atomic_swap_uint(volatile unsigned int *, unsigned int); |
116 | unsigned long atomic_swap_ulong(volatile unsigned long *, unsigned long); |
117 | void * atomic_swap_ptr(volatile void *, void *); |
118 | uint64_t atomic_swap_64(volatile uint64_t *, uint64_t); |
119 | |
120 | /* |
121 | * Atomic DECREMENT |
122 | */ |
123 | void atomic_dec_32(volatile uint32_t *); |
124 | void atomic_dec_uint(volatile unsigned int *); |
125 | void atomic_dec_ulong(volatile unsigned long *); |
126 | void atomic_dec_ptr(volatile void *); |
127 | void atomic_dec_64(volatile uint64_t *); |
128 | |
129 | uint32_t atomic_dec_32_nv(volatile uint32_t *); |
130 | unsigned int atomic_dec_uint_nv(volatile unsigned int *); |
131 | unsigned long atomic_dec_ulong_nv(volatile unsigned long *); |
132 | void * atomic_dec_ptr_nv(volatile void *); |
133 | uint64_t atomic_dec_64_nv(volatile uint64_t *); |
134 | |
135 | /* |
136 | * Atomic INCREMENT |
137 | */ |
138 | void atomic_inc_32(volatile uint32_t *); |
139 | void atomic_inc_uint(volatile unsigned int *); |
140 | void atomic_inc_ulong(volatile unsigned long *); |
141 | void atomic_inc_ptr(volatile void *); |
142 | void atomic_inc_64(volatile uint64_t *); |
143 | |
144 | uint32_t atomic_inc_32_nv(volatile uint32_t *); |
145 | unsigned int atomic_inc_uint_nv(volatile unsigned int *); |
146 | unsigned long atomic_inc_ulong_nv(volatile unsigned long *); |
147 | void * atomic_inc_ptr_nv(volatile void *); |
148 | uint64_t atomic_inc_64_nv(volatile uint64_t *); |
149 | |
150 | /* |
151 | * Memory barrier operations |
152 | */ |
153 | void membar_enter(void); |
154 | void membar_exit(void); |
155 | void membar_producer(void); |
156 | void membar_consumer(void); |
157 | void membar_sync(void); |
158 | |
159 | #ifdef __HAVE_MEMBAR_DATADEP_CONSUMER |
160 | void membar_datadep_consumer(void); |
161 | #else |
162 | #define membar_datadep_consumer() ((void)0) |
163 | #endif |
164 | |
165 | __END_DECLS |
166 | |
167 | #endif /* ! _SYS_ATOMIC_H_ */ |
168 | |