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29ab0cf7 | 1 | /* |
7d53f6b0 | 2 | * Copyright (c) 2013, 2014 Nicira, Inc. |
29ab0cf7 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 Clang. */ | |
18 | #ifndef IN_OVS_ATOMIC_H | |
19 | #error "This header should only be included indirectly via ovs-atomic.h." | |
20 | #endif | |
21 | ||
22 | #define OVS_ATOMIC_CLANG_IMPL 1 | |
23 | ||
7d53f6b0 | 24 | #define ATOMIC(TYPE) _Atomic(TYPE) |
29ab0cf7 BP |
25 | |
26 | #define ATOMIC_VAR_INIT(VALUE) (VALUE) | |
27 | ||
28 | #define atomic_init(OBJECT, VALUE) __c11_atomic_init(OBJECT, VALUE) | |
29 | ||
30 | /* Clang hard-codes these exact values internally but does not appear to | |
31 | * export any names for them. */ | |
32 | typedef enum { | |
33 | memory_order_relaxed = 0, | |
34 | memory_order_consume = 1, | |
35 | memory_order_acquire = 2, | |
36 | memory_order_release = 3, | |
37 | memory_order_acq_rel = 4, | |
38 | memory_order_seq_cst = 5 | |
39 | } memory_order; | |
40 | ||
41 | #define atomic_thread_fence(ORDER) __c11_atomic_thread_fence(ORDER) | |
42 | #define atomic_signal_fence(ORDER) __c11_atomic_signal_fence(ORDER) | |
43 | ||
44 | #define atomic_store(DST, SRC) \ | |
45 | atomic_store_explicit(DST, SRC, memory_order_seq_cst) | |
46 | #define atomic_store_explicit(DST, SRC, ORDER) \ | |
47 | __c11_atomic_store(DST, SRC, ORDER) | |
48 | ||
49 | ||
50 | #define atomic_read(SRC, DST) \ | |
51 | atomic_read_explicit(SRC, DST, memory_order_seq_cst) | |
52 | #define atomic_read_explicit(SRC, DST, ORDER) \ | |
53 | (*(DST) = __c11_atomic_load(SRC, ORDER), \ | |
54 | (void) 0) | |
55 | ||
25045d75 JR |
56 | #define atomic_compare_exchange_strong(DST, EXP, SRC) \ |
57 | atomic_compare_exchange_strong_explicit(DST, EXP, SRC, \ | |
58 | memory_order_seq_cst, \ | |
59 | memory_order_seq_cst) | |
60 | #define atomic_compare_exchange_strong_explicit(DST, EXP, SRC, ORD1, ORD2) \ | |
61 | __c11_atomic_compare_exchange_strong(DST, EXP, SRC, ORD1, ORD2) | |
62 | ||
63 | #define atomic_compare_exchange_weak(DST, EXP, SRC) \ | |
64 | atomic_compare_exchange_weak_explicit(DST, EXP, SRC, \ | |
65 | memory_order_seq_cst, \ | |
66 | memory_order_seq_cst) | |
67 | #define atomic_compare_exchange_weak_explicit(DST, EXP, SRC, ORD1, ORD2) \ | |
68 | __c11_atomic_compare_exchange_weak(DST, EXP, SRC, ORD1, ORD2) | |
69 | ||
29ab0cf7 BP |
70 | #define atomic_add(RMW, ARG, ORIG) \ |
71 | atomic_add_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
72 | #define atomic_sub(RMW, ARG, ORIG) \ | |
73 | atomic_sub_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
74 | #define atomic_or(RMW, ARG, ORIG) \ | |
75 | atomic_or_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
76 | #define atomic_xor(RMW, ARG, ORIG) \ | |
77 | atomic_xor_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
78 | #define atomic_and(RMW, ARG, ORIG) \ | |
79 | atomic_and_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
80 | ||
81 | #define atomic_add_explicit(RMW, ARG, ORIG, ORDER) \ | |
82 | (*(ORIG) = __c11_atomic_fetch_add(RMW, ARG, ORDER), (void) 0) | |
83 | #define atomic_sub_explicit(RMW, ARG, ORIG, ORDER) \ | |
84 | (*(ORIG) = __c11_atomic_fetch_sub(RMW, ARG, ORDER), (void) 0) | |
85 | #define atomic_or_explicit(RMW, ARG, ORIG, ORDER) \ | |
86 | (*(ORIG) = __c11_atomic_fetch_or(RMW, ARG, ORDER), (void) 0) | |
87 | #define atomic_xor_explicit(RMW, ARG, ORIG, ORDER) \ | |
88 | (*(ORIG) = __c11_atomic_fetch_xor(RMW, ARG, ORDER), (void) 0) | |
89 | #define atomic_and_explicit(RMW, ARG, ORIG, ORDER) \ | |
90 | (*(ORIG) = __c11_atomic_fetch_and(RMW, ARG, ORDER), (void) 0) | |
91 | ||
92 | #include "ovs-atomic-flag-gcc4.7+.h" |