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Vector Packet Processing
atomics.h
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1 /*
2  * Copyright (c) 2018 Cisco and/or its affiliates.
3  * Copyright (c) 2018 Arm Limited. and/or its affiliates.
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 #ifndef included_clib_atomics_h
18 #define included_clib_atomics_h
19 
20 /* Legacy __sync builtins */
21 
22 /* Full Barrier */
23 #define clib_atomic_fetch_add(a, b) __sync_fetch_and_add(a, b)
24 #define clib_atomic_fetch_sub(a, b) __sync_fetch_and_sub(a, b)
25 #define clib_atomic_fetch_and(a, b) __sync_fetch_and_and(a, b)
26 #define clib_atomic_fetch_xor(a, b) __sync_fetch_and_xor(a, b)
27 #define clib_atomic_fetch_or(a, b) __sync_fetch_and_or(a, b)
28 #define clib_atomic_fetch_nand(a, b) __sync_fetch_nand(a, b)
29 
30 #define clib_atomic_add_fetch(a, b) __sync_add_and_fetch(a, b)
31 #define clib_atomic_sub_fetch(a, b) __sync_sub_and_fetch(a, b)
32 #define clib_atomic_and_fetch(a, b) __sync_and_and_fetch(a, b)
33 #define clib_atomic_xor_fetch(a, b) __sync_xor_and_fetch(a, b)
34 #define clib_atomic_or_fetch(a, b) __sync_or_and_fetch(a, b)
35 #define clib_atomic_nand_fetch(a, b) __sync_nand_and_fetch(a, b)
36 
37 #define clib_atomic_cmp_and_swap(addr,old,new) __sync_val_compare_and_swap(addr, old, new)
38 #define clib_atomic_bool_cmp_and_swap(addr,old,new) __sync_bool_compare_and_swap(addr, old, new)
39 
40 #define clib_atomic_cmp_and_swap_acq_relax_n(addr,exp,new,weak) __atomic_compare_exchange_n ((addr), (exp), (new), (weak), __ATOMIC_ACQUIRE, __ATOMIC_RELAXED)
41 #define clib_atomic_cmp_and_swap_acq_relax(addr, exp, new, weak) \
42  __atomic_compare_exchange ((addr), (exp), (new), (weak), __ATOMIC_ACQUIRE, \
43  __ATOMIC_RELAXED)
44 
45 #define clib_atomic_test_and_set(a) __atomic_exchange_n(a, 1, __ATOMIC_ACQUIRE)
46 #define clib_atomic_release(a) __atomic_store_n(a, 0, __ATOMIC_RELEASE)
47 
48 #define clib_atomic_fence_rel() __atomic_thread_fence(__ATOMIC_RELEASE);
49 
50 #define clib_atomic_load_relax_n(a) __atomic_load_n((a), __ATOMIC_RELAXED)
51 #define clib_atomic_load_acq_n(a) __atomic_load_n((a), __ATOMIC_ACQUIRE)
52 #define clib_atomic_store_rel_n(a, b) __atomic_store_n ((a), (b), __ATOMIC_RELEASE)
53 #define clib_atomic_store_seq_cst(a, b) \
54  __atomic_store_n ((a), (b), __ATOMIC_SEQ_CST)
55 #define clib_atomic_load_seq_cst(a) __atomic_load_n ((a), __ATOMIC_SEQ_CST)
56 
57 #define clib_atomic_swap_acq_n(a, b) __atomic_exchange_n ((a), (b), __ATOMIC_ACQUIRE)
58 #define clib_atomic_swap_rel_n(a, b) __atomic_exchange_n ((a), (b), __ATOMIC_RELEASE)
59 
60 #define clib_atomic_fetch_add_rel(a, b) __atomic_fetch_add((a), (b), __ATOMIC_RELEASE)
61 #define clib_atomic_fetch_sub_rel(a, b) __atomic_fetch_sub((a), (b), __ATOMIC_RELEASE)
62 
63 #define clib_atomic_fetch_add_relax(a, b) __atomic_fetch_add((a), (b), __ATOMIC_RELAXED)
64 #define clib_atomic_fetch_sub_relax(a, b) __atomic_fetch_sub((a), (b), __ATOMIC_RELAXED)
65 
66 #endif /* included_clib_atomics_h */