1 /*
2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2022 Huawei Device Co., Ltd. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this list of
9 * conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
12 * of conditions and the following disclaimer in the documentation and/or other materials
13 * provided with the distribution.
14 *
15 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
16 * to endorse or promote products derived from this software without specific prior written
17 * permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifndef _LOS_ARCH_ATOMIC_H
33 #define _LOS_ARCH_ATOMIC_H
34
35 #include "los_compiler.h"
36 #include "los_interrupt.h"
37
38 #ifdef __cplusplus
39 #if __cplusplus
40 extern "C" {
41 #endif /* __cplusplus */
42 #endif /* __cplusplus */
43
ArchAtomicRead(const Atomic * v)44 STATIC INLINE INT32 ArchAtomicRead(const Atomic *v)
45 {
46 return *v;
47 }
48
ArchAtomicSet(Atomic * v,INT32 setVal)49 STATIC INLINE VOID ArchAtomicSet(Atomic *v, INT32 setVal)
50 {
51 UINT32 intSave;
52
53 intSave = LOS_IntLock();
54 *v = setVal;
55 LOS_IntRestore(intSave);
56 }
57
ArchAtomicAdd(Atomic * v,INT32 addVal)58 STATIC INLINE INT32 ArchAtomicAdd(Atomic *v, INT32 addVal)
59 {
60 INT32 val;
61 UINT32 intSave;
62
63 intSave = LOS_IntLock();
64 *v += addVal;
65 val = *v;
66 LOS_IntRestore(intSave);
67
68 return val;
69 }
70
ArchAtomicSub(Atomic * v,INT32 subVal)71 STATIC INLINE INT32 ArchAtomicSub(Atomic *v, INT32 subVal)
72 {
73 INT32 val;
74 UINT32 intSave;
75
76 intSave = LOS_IntLock();
77 *v -= subVal;
78 val = *v;
79 LOS_IntRestore(intSave);
80
81 return val;
82 }
83
ArchAtomicInc(Atomic * v)84 STATIC INLINE VOID ArchAtomicInc(Atomic *v)
85 {
86 (VOID)ArchAtomicAdd(v, 1);
87 }
88
ArchAtomicDec(Atomic * v)89 STATIC INLINE VOID ArchAtomicDec(Atomic *v)
90 {
91 (VOID)ArchAtomicSub(v, 1);
92 }
93
ArchAtomicIncRet(Atomic * v)94 STATIC INLINE INT32 ArchAtomicIncRet(Atomic *v)
95 {
96 return ArchAtomicAdd(v, 1);
97 }
98
ArchAtomicDecRet(Atomic * v)99 STATIC INLINE INT32 ArchAtomicDecRet(Atomic *v)
100 {
101 return ArchAtomicSub(v, 1);
102 }
103
ArchAtomicXchg32bits(Atomic * v,INT32 val)104 STATIC INLINE INT32 ArchAtomicXchg32bits(Atomic *v, INT32 val)
105 {
106 INT32 prevVal;
107 UINT32 intSave;
108
109 intSave = LOS_IntLock();
110 prevVal = *v;
111 *v = val;
112 LOS_IntRestore(intSave);
113
114 return prevVal;
115 }
116
ArchAtomicCmpXchg32bits(Atomic * v,INT32 val,INT32 oldVal)117 STATIC INLINE BOOL ArchAtomicCmpXchg32bits(Atomic *v, INT32 val, INT32 oldVal)
118 {
119 INT32 prevVal;
120 UINT32 intSave;
121
122 intSave = LOS_IntLock();
123 prevVal = *v;
124 if (prevVal == oldVal) {
125 *v = val;
126 }
127 LOS_IntRestore(intSave);
128
129 return prevVal != oldVal;
130 }
131
ArchAtomic64Read(const Atomic64 * v)132 STATIC INLINE INT64 ArchAtomic64Read(const Atomic64 *v)
133 {
134 INT64 val;
135 UINT32 intSave;
136
137 intSave = LOS_IntLock();
138 val = *v;
139 LOS_IntRestore(intSave);
140
141 return val;
142 }
143
ArchAtomic64Set(Atomic64 * v,INT64 setVal)144 STATIC INLINE VOID ArchAtomic64Set(Atomic64 *v, INT64 setVal)
145 {
146 UINT32 intSave;
147
148 intSave = LOS_IntLock();
149 *v = setVal;
150 LOS_IntRestore(intSave);
151 }
152
ArchAtomic64Add(Atomic64 * v,INT64 addVal)153 STATIC INLINE INT64 ArchAtomic64Add(Atomic64 *v, INT64 addVal)
154 {
155 INT64 val;
156 UINT32 intSave;
157
158 intSave = LOS_IntLock();
159 *v += addVal;
160 val = *v;
161 LOS_IntRestore(intSave);
162
163 return val;
164 }
165
ArchAtomic64Sub(Atomic64 * v,INT64 subVal)166 STATIC INLINE INT64 ArchAtomic64Sub(Atomic64 *v, INT64 subVal)
167 {
168 INT64 val;
169 UINT32 intSave;
170
171 intSave = LOS_IntLock();
172 *v -= subVal;
173 val = *v;
174 LOS_IntRestore(intSave);
175
176 return val;
177 }
178
ArchAtomic64Inc(Atomic64 * v)179 STATIC INLINE VOID ArchAtomic64Inc(Atomic64 *v)
180 {
181 (VOID)ArchAtomic64Add(v, 1);
182 }
183
ArchAtomic64IncRet(Atomic64 * v)184 STATIC INLINE INT64 ArchAtomic64IncRet(Atomic64 *v)
185 {
186 return ArchAtomic64Add(v, 1);
187 }
188
ArchAtomic64Dec(Atomic64 * v)189 STATIC INLINE VOID ArchAtomic64Dec(Atomic64 *v)
190 {
191 (VOID)ArchAtomic64Sub(v, 1);
192 }
193
ArchAtomic64DecRet(Atomic64 * v)194 STATIC INLINE INT64 ArchAtomic64DecRet(Atomic64 *v)
195 {
196 return ArchAtomic64Sub(v, 1);
197 }
198
ArchAtomicXchg64bits(Atomic64 * v,INT64 val)199 STATIC INLINE INT64 ArchAtomicXchg64bits(Atomic64 *v, INT64 val)
200 {
201 INT64 prevVal;
202 UINT32 intSave;
203
204 intSave = LOS_IntLock();
205 prevVal = *v;
206 *v = val;
207 LOS_IntRestore(intSave);
208
209 return prevVal;
210 }
211
ArchAtomicCmpXchg64bits(Atomic64 * v,INT64 val,INT64 oldVal)212 STATIC INLINE BOOL ArchAtomicCmpXchg64bits(Atomic64 *v, INT64 val, INT64 oldVal)
213 {
214 INT64 prevVal;
215 UINT32 intSave;
216
217 intSave = LOS_IntLock();
218 prevVal = *v;
219 if (prevVal == oldVal) {
220 *v = val;
221 }
222 LOS_IntRestore(intSave);
223
224 return prevVal != oldVal;
225 }
226
227 #ifdef __cplusplus
228 #if __cplusplus
229 }
230 #endif /* __cplusplus */
231 #endif /* __cplusplus */
232
233 #endif /* _LOS_ARCH_ATOMIC_H */
234
235