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31a3fc6e | 1 | /* |
7d53f6b0 | 2 | * Copyright (c) 2013, 2014 Nicira, Inc. |
31a3fc6e BP |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | /* This header implements atomic operation primitives on compilers that | |
18 | * have built-in support for C11 <stdatomic.h> */ | |
19 | #ifndef IN_OVS_ATOMIC_H | |
20 | #error "This header should only be included indirectly via ovs-atomic.h." | |
21 | #endif | |
22 | ||
23 | #include <stdatomic.h> | |
24 | ||
7d53f6b0 BP |
25 | #define OMIT_STANDARD_ATOMIC_TYPES 1 |
26 | #define ATOMIC(TYPE) _Atomic(TYPE) | |
31a3fc6e BP |
27 | |
28 | #define atomic_read(SRC, DST) \ | |
29 | atomic_read_explicit(SRC, DST, memory_order_seq_cst) | |
30 | #define atomic_read_explicit(SRC, DST, ORDER) \ | |
31 | (*(DST) = atomic_load_explicit(SRC, ORDER), \ | |
32 | (void) 0) | |
33 | ||
34 | #define atomic_add(RMW, ARG, ORIG) \ | |
35 | atomic_add_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
36 | #define atomic_sub(RMW, ARG, ORIG) \ | |
37 | atomic_sub_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
38 | #define atomic_or(RMW, ARG, ORIG) \ | |
39 | atomic_or_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
40 | #define atomic_xor(RMW, ARG, ORIG) \ | |
41 | atomic_xor_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
42 | #define atomic_and(RMW, ARG, ORIG) \ | |
43 | atomic_and_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
44 | ||
45 | #define atomic_add_explicit(RMW, ARG, ORIG, ORDER) \ | |
46 | (*(ORIG) = atomic_fetch_add_explicit(RMW, ARG, ORDER), (void) 0) | |
47 | #define atomic_sub_explicit(RMW, ARG, ORIG, ORDER) \ | |
48 | (*(ORIG) = atomic_fetch_sub_explicit(RMW, ARG, ORDER), (void) 0) | |
49 | #define atomic_or_explicit(RMW, ARG, ORIG, ORDER) \ | |
50 | (*(ORIG) = atomic_fetch_or_explicit(RMW, ARG, ORDER), (void) 0) | |
51 | #define atomic_xor_explicit(RMW, ARG, ORIG, ORDER) \ | |
52 | (*(ORIG) = atomic_fetch_xor_explicit(RMW, ARG, ORDER), (void) 0) | |
53 | #define atomic_and_explicit(RMW, ARG, ORIG, ORDER) \ | |
54 | (*(ORIG) = atomic_fetch_and_explicit(RMW, ARG, ORDER), (void) 0) |