projects / ovs.git / blame
| Commit | Line | Data |
|---|---|---|
| 31a3fc6e BP |
1 | /* |
| 2 | * Copyright (c) 2013 Nicira, Inc. | |
| 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 | ||
| 25 | /* Nonstandard atomic types. */ | |
| 26 | typedef _Atomic(uint8_t) atomic_uint8_t; | |
| 27 | typedef _Atomic(uint16_t) atomic_uint16_t; | |
| 28 | typedef _Atomic(uint32_t) atomic_uint32_t; | |
| 29 | typedef _Atomic(uint64_t) atomic_uint64_t; | |
| 30 | ||
| 31 | typedef _Atomic(int8_t) atomic_int8_t; | |
| 32 | typedef _Atomic(int16_t) atomic_int16_t; | |
| 33 | typedef _Atomic(int32_t) atomic_int32_t; | |
| 34 | typedef _Atomic(int64_t) atomic_int64_t; | |
| 35 | ||
| 36 | #define atomic_read(SRC, DST) \ | |
| 37 | atomic_read_explicit(SRC, DST, memory_order_seq_cst) | |
| 38 | #define atomic_read_explicit(SRC, DST, ORDER) \ | |
| 39 | (*(DST) = atomic_load_explicit(SRC, ORDER), \ | |
| 40 | (void) 0) | |
| 41 | ||
| 42 | #define atomic_add(RMW, ARG, ORIG) \ | |
| 43 | atomic_add_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
| 44 | #define atomic_sub(RMW, ARG, ORIG) \ | |
| 45 | atomic_sub_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
| 46 | #define atomic_or(RMW, ARG, ORIG) \ | |
| 47 | atomic_or_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
| 48 | #define atomic_xor(RMW, ARG, ORIG) \ | |
| 49 | atomic_xor_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
| 50 | #define atomic_and(RMW, ARG, ORIG) \ | |
| 51 | atomic_and_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
| 52 | ||
| 53 | #define atomic_add_explicit(RMW, ARG, ORIG, ORDER) \ | |
| 54 | (*(ORIG) = atomic_fetch_add_explicit(RMW, ARG, ORDER), (void) 0) | |
| 55 | #define atomic_sub_explicit(RMW, ARG, ORIG, ORDER) \ | |
| 56 | (*(ORIG) = atomic_fetch_sub_explicit(RMW, ARG, ORDER), (void) 0) | |
| 57 | #define atomic_or_explicit(RMW, ARG, ORIG, ORDER) \ | |
| 58 | (*(ORIG) = atomic_fetch_or_explicit(RMW, ARG, ORDER), (void) 0) | |
| 59 | #define atomic_xor_explicit(RMW, ARG, ORIG, ORDER) \ | |
| 60 | (*(ORIG) = atomic_fetch_xor_explicit(RMW, ARG, ORDER), (void) 0) | |
| 61 | #define atomic_and_explicit(RMW, ARG, ORIG, ORDER) \ | |
| 62 | (*(ORIG) = atomic_fetch_and_explicit(RMW, ARG, ORDER), (void) 0) |