1 /*
2 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
3 * Copyright (c) 2020-2021 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
37 #ifdef __cplusplus
38 #if __cplusplus
39 extern "C" {
40 #endif /* __cplusplus */
41 #endif /* __cplusplus */
42
ArchAtomicRead(const Atomic * v)43 STATIC INLINE INT32 ArchAtomicRead(const Atomic *v)
44 {
45 return *v;
46 }
47
ArchAtomicSet(Atomic * v,INT32 setVal)48 STATIC INLINE VOID ArchAtomicSet(Atomic *v, INT32 setVal)
49 {
50 UINT32 intSave;
51
52 intSave = LOS_IntLock();
53 *v = setVal;
54 LOS_IntRestore(intSave);
55 }
56
ArchAtomicAdd(Atomic * v,INT32 addVal)57 STATIC INLINE INT32 ArchAtomicAdd(Atomic *v, INT32 addVal)
58 {
59 INT32 val;
60 UINT32 intSave;
61
62 intSave = LOS_IntLock();
63 *v += addVal;
64 val = *v;
65 LOS_IntRestore(intSave);
66
67 return val;
68 }
69
ArchAtomicSub(Atomic * v,INT32 subVal)70 STATIC INLINE INT32 ArchAtomicSub(Atomic *v, INT32 subVal)
71 {
72 INT32 val;
73 UINT32 intSave;
74
75 intSave = LOS_IntLock();
76 *v -= subVal;
77 val = *v;
78 LOS_IntRestore(intSave);
79
80 return val;
81 }
82
ArchAtomicInc(Atomic * v)83 STATIC INLINE VOID ArchAtomicInc(Atomic *v)
84 {
85 (VOID)ArchAtomicAdd(v, 1);
86 }
87
ArchAtomicDec(Atomic * v)88 STATIC INLINE VOID ArchAtomicDec(Atomic *v)
89 {
90 (VOID)ArchAtomicSub(v, 1);
91 }
92
ArchAtomicIncRet(Atomic * v)93 STATIC INLINE INT32 ArchAtomicIncRet(Atomic *v)
94 {
95 return ArchAtomicAdd(v, 1);
96 }
97
ArchAtomicDecRet(Atomic * v)98 STATIC INLINE INT32 ArchAtomicDecRet(Atomic *v)
99 {
100 return ArchAtomicSub(v, 1);
101 }
102
ArchAtomicXchg32bits(Atomic * v,INT32 val)103 STATIC INLINE INT32 ArchAtomicXchg32bits(Atomic *v, INT32 val)
104 {
105 INT32 prevVal;
106 UINT32 intSave;
107
108 intSave = LOS_IntLock();
109 prevVal = *v;
110 *v = val;
111 LOS_IntRestore(intSave);
112
113 return prevVal;
114 }
115
ArchAtomicCmpXchg32bits(Atomic * v,INT32 val,INT32 oldVal)116 STATIC INLINE BOOL ArchAtomicCmpXchg32bits(Atomic *v, INT32 val, INT32 oldVal)
117 {
118 INT32 prevVal;
119 UINT32 intSave;
120
121 intSave = LOS_IntLock();
122 prevVal = *v;
123 if (prevVal == oldVal) {
124 *v = val;
125 }
126 LOS_IntRestore(intSave);
127
128 return prevVal != oldVal;
129 }
130
ArchAtomic64Read(const Atomic64 * v)131 STATIC INLINE INT64 ArchAtomic64Read(const Atomic64 *v)
132 {
133 INT64 val;
134 UINT32 intSave;
135
136 intSave = LOS_IntLock();
137 val = *v;
138 LOS_IntRestore(intSave);
139
140 return val;
141 }
142
ArchAtomic64Set(Atomic64 * v,INT64 setVal)143 STATIC INLINE VOID ArchAtomic64Set(Atomic64 *v, INT64 setVal)
144 {
145 UINT32 intSave;
146
147 intSave = LOS_IntLock();
148 *v = setVal;
149 LOS_IntRestore(intSave);
150 }
151
ArchAtomic64Add(Atomic64 * v,INT64 addVal)152 STATIC INLINE INT64 ArchAtomic64Add(Atomic64 *v, INT64 addVal)
153 {
154 INT64 val;
155 UINT32 intSave;
156
157 intSave = LOS_IntLock();
158 *v += addVal;
159 val = *v;
160 LOS_IntRestore(intSave);
161
162 return val;
163 }
164
ArchAtomic64Sub(Atomic64 * v,INT64 subVal)165 STATIC INLINE INT64 ArchAtomic64Sub(Atomic64 *v, INT64 subVal)
166 {
167 INT64 val;
168 UINT32 intSave;
169
170 intSave = LOS_IntLock();
171 *v -= subVal;
172 val = *v;
173 LOS_IntRestore(intSave);
174
175 return val;
176 }
177
ArchAtomic64Inc(Atomic64 * v)178 STATIC INLINE VOID ArchAtomic64Inc(Atomic64 *v)
179 {
180 (VOID)ArchAtomic64Add(v, 1);
181 }
182
ArchAtomic64IncRet(Atomic64 * v)183 STATIC INLINE INT64 ArchAtomic64IncRet(Atomic64 *v)
184 {
185 return ArchAtomic64Add(v, 1);
186 }
187
ArchAtomic64Dec(Atomic64 * v)188 STATIC INLINE VOID ArchAtomic64Dec(Atomic64 *v)
189 {
190 (VOID)ArchAtomic64Sub(v, 1);
191 }
192
ArchAtomic64DecRet(Atomic64 * v)193 STATIC INLINE INT64 ArchAtomic64DecRet(Atomic64 *v)
194 {
195 return ArchAtomic64Sub(v, 1);
196 }
197
ArchAtomicXchg64bits(Atomic64 * v,INT64 val)198 STATIC INLINE INT64 ArchAtomicXchg64bits(Atomic64 *v, INT64 val)
199 {
200 INT64 prevVal;
201 UINT32 intSave;
202
203 intSave = LOS_IntLock();
204 prevVal = *v;
205 *v = val;
206 LOS_IntRestore(intSave);
207
208 return prevVal;
209 }
210
ArchAtomicCmpXchg64bits(Atomic64 * v,INT64 val,INT64 oldVal)211 STATIC INLINE BOOL ArchAtomicCmpXchg64bits(Atomic64 *v, INT64 val, INT64 oldVal)
212 {
213 INT64 prevVal;
214 UINT32 intSave;
215
216 intSave = LOS_IntLock();
217 prevVal = *v;
218 if (prevVal == oldVal) {
219 *v = val;
220 }
221 LOS_IntRestore(intSave);
222
223 return prevVal != oldVal;
224 }
225
226 #ifdef __cplusplus
227 #if __cplusplus
228 }
229 #endif /* __cplusplus */
230 #endif /* __cplusplus */
231
232 #endif /* _LOS_ARCH_ATOMIC_H */
233
234