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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 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 | ||
24 | /* Standard atomic types. */ | |
25 | typedef _Atomic(_Bool) atomic_bool; | |
26 | ||
27 | typedef _Atomic(char) atomic_char; | |
28 | typedef _Atomic(signed char) atomic_schar; | |
29 | typedef _Atomic(unsigned char) atomic_uchar; | |
30 | ||
31 | typedef _Atomic(short) atomic_short; | |
32 | typedef _Atomic(unsigned short) atomic_ushort; | |
33 | ||
34 | typedef _Atomic(int) atomic_int; | |
35 | typedef _Atomic(unsigned int) atomic_uint; | |
36 | ||
37 | typedef _Atomic(long) atomic_long; | |
38 | typedef _Atomic(unsigned long) atomic_ulong; | |
39 | ||
40 | typedef _Atomic(long long) atomic_llong; | |
41 | typedef _Atomic(unsigned long long) atomic_ullong; | |
42 | ||
43 | typedef _Atomic(size_t) atomic_size_t; | |
44 | typedef _Atomic(ptrdiff_t) atomic_ptrdiff_t; | |
45 | ||
46 | typedef _Atomic(intmax_t) atomic_intmax_t; | |
47 | typedef _Atomic(uintmax_t) atomic_uintmax_t; | |
48 | ||
49 | typedef _Atomic(intptr_t) atomic_intptr_t; | |
50 | typedef _Atomic(uintptr_t) atomic_uintptr_t; | |
51 | ||
52 | /* Nonstandard atomic types. */ | |
53 | typedef _Atomic(uint8_t) atomic_uint8_t; | |
54 | typedef _Atomic(uint16_t) atomic_uint16_t; | |
55 | typedef _Atomic(uint32_t) atomic_uint32_t; | |
56 | typedef _Atomic(uint64_t) atomic_uint64_t; | |
57 | ||
58 | typedef _Atomic(int8_t) atomic_int8_t; | |
59 | typedef _Atomic(int16_t) atomic_int16_t; | |
60 | typedef _Atomic(int32_t) atomic_int32_t; | |
61 | typedef _Atomic(int64_t) atomic_int64_t; | |
62 | ||
63 | #define ATOMIC_VAR_INIT(VALUE) (VALUE) | |
64 | ||
65 | #define atomic_init(OBJECT, VALUE) __c11_atomic_init(OBJECT, VALUE) | |
c5f81b20 | 66 | #define atomic_destroy(OBJECT) ((void) (OBJECT)) |
29ab0cf7 BP |
67 | |
68 | /* Clang hard-codes these exact values internally but does not appear to | |
69 | * export any names for them. */ | |
70 | typedef enum { | |
71 | memory_order_relaxed = 0, | |
72 | memory_order_consume = 1, | |
73 | memory_order_acquire = 2, | |
74 | memory_order_release = 3, | |
75 | memory_order_acq_rel = 4, | |
76 | memory_order_seq_cst = 5 | |
77 | } memory_order; | |
78 | ||
79 | #define atomic_thread_fence(ORDER) __c11_atomic_thread_fence(ORDER) | |
80 | #define atomic_signal_fence(ORDER) __c11_atomic_signal_fence(ORDER) | |
81 | ||
82 | #define atomic_store(DST, SRC) \ | |
83 | atomic_store_explicit(DST, SRC, memory_order_seq_cst) | |
84 | #define atomic_store_explicit(DST, SRC, ORDER) \ | |
85 | __c11_atomic_store(DST, SRC, ORDER) | |
86 | ||
87 | ||
88 | #define atomic_read(SRC, DST) \ | |
89 | atomic_read_explicit(SRC, DST, memory_order_seq_cst) | |
90 | #define atomic_read_explicit(SRC, DST, ORDER) \ | |
91 | (*(DST) = __c11_atomic_load(SRC, ORDER), \ | |
92 | (void) 0) | |
93 | ||
94 | #define atomic_add(RMW, ARG, ORIG) \ | |
95 | atomic_add_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
96 | #define atomic_sub(RMW, ARG, ORIG) \ | |
97 | atomic_sub_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
98 | #define atomic_or(RMW, ARG, ORIG) \ | |
99 | atomic_or_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
100 | #define atomic_xor(RMW, ARG, ORIG) \ | |
101 | atomic_xor_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
102 | #define atomic_and(RMW, ARG, ORIG) \ | |
103 | atomic_and_explicit(RMW, ARG, ORIG, memory_order_seq_cst) | |
104 | ||
105 | #define atomic_add_explicit(RMW, ARG, ORIG, ORDER) \ | |
106 | (*(ORIG) = __c11_atomic_fetch_add(RMW, ARG, ORDER), (void) 0) | |
107 | #define atomic_sub_explicit(RMW, ARG, ORIG, ORDER) \ | |
108 | (*(ORIG) = __c11_atomic_fetch_sub(RMW, ARG, ORDER), (void) 0) | |
109 | #define atomic_or_explicit(RMW, ARG, ORIG, ORDER) \ | |
110 | (*(ORIG) = __c11_atomic_fetch_or(RMW, ARG, ORDER), (void) 0) | |
111 | #define atomic_xor_explicit(RMW, ARG, ORIG, ORDER) \ | |
112 | (*(ORIG) = __c11_atomic_fetch_xor(RMW, ARG, ORDER), (void) 0) | |
113 | #define atomic_and_explicit(RMW, ARG, ORIG, ORDER) \ | |
114 | (*(ORIG) = __c11_atomic_fetch_and(RMW, ARG, ORDER), (void) 0) | |
115 | ||
116 | #include "ovs-atomic-flag-gcc4.7+.h" |