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git.proxmox.com Git - ovs.git/blob - lib/ovs-atomic-gcc4.7+.h
2 * Copyright (c) 2013, 2014 Nicira, Inc.
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:
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 /* This header implements atomic operation primitives on GCC 4.7 and later. */
18 #ifndef IN_OVS_ATOMIC_H
19 #error "This header should only be included indirectly via ovs-atomic.h."
22 #define ATOMIC(TYPE) TYPE
25 memory_order_relaxed
= __ATOMIC_RELAXED
,
26 memory_order_consume
= __ATOMIC_CONSUME
,
27 memory_order_acquire
= __ATOMIC_ACQUIRE
,
28 memory_order_release
= __ATOMIC_RELEASE
,
29 memory_order_acq_rel
= __ATOMIC_ACQ_REL
,
30 memory_order_seq_cst
= __ATOMIC_SEQ_CST
33 #define ATOMIC_VAR_INIT(VALUE) (VALUE)
34 #define atomic_init(OBJECT, VALUE) (*(OBJECT) = (VALUE), (void) 0)
36 #define atomic_thread_fence __atomic_thread_fence
37 #define atomic_signal_fence __atomic_signal_fence
38 #define atomic_is_lock_free __atomic_is_lock_free
40 #define atomic_store(DST, SRC) \
41 atomic_store_explicit(DST, SRC, memory_order_seq_cst)
42 #define atomic_store_explicit __atomic_store_n
44 #define atomic_read(SRC, DST) \
45 atomic_read_explicit(SRC, DST, memory_order_seq_cst)
46 #define atomic_read_explicit(SRC, DST, ORDER) \
47 (*(DST) = __atomic_load_n(SRC, ORDER), \
50 #define atomic_compare_exchange_strong(DST, EXP, SRC) \
51 atomic_compare_exchange_strong_explicit(DST, EXP, SRC, \
52 memory_order_seq_cst, \
54 #define atomic_compare_exchange_strong_explicit(DST, EXP, SRC, ORD1, ORD2) \
55 __atomic_compare_exchange_n(DST, EXP, SRC, false, ORD1, ORD2)
57 #define atomic_compare_exchange_weak(DST, EXP, SRC) \
58 atomic_compare_exchange_weak_explicit(DST, EXP, SRC, \
59 memory_order_seq_cst, \
61 #define atomic_compare_exchange_weak_explicit(DST, EXP, SRC, ORD1, ORD2) \
62 __atomic_compare_exchange_n(DST, EXP, SRC, true, ORD1, ORD2)
64 #define atomic_add(RMW, OPERAND, ORIG) \
65 atomic_add_explicit(RMW, OPERAND, ORIG, memory_order_seq_cst)
66 #define atomic_sub(RMW, OPERAND, ORIG) \
67 atomic_sub_explicit(RMW, OPERAND, ORIG, memory_order_seq_cst)
68 #define atomic_or(RMW, OPERAND, ORIG) \
69 atomic_or_explicit(RMW, OPERAND, ORIG, memory_order_seq_cst)
70 #define atomic_xor(RMW, OPERAND, ORIG) \
71 atomic_xor_explicit(RMW, OPERAND, ORIG, memory_order_seq_cst)
72 #define atomic_and(RMW, OPERAND, ORIG) \
73 atomic_and_explicit(RMW, OPERAND, ORIG, memory_order_seq_cst)
75 #define atomic_add_explicit(RMW, OPERAND, ORIG, ORDER) \
76 (*(ORIG) = __atomic_fetch_add(RMW, OPERAND, ORDER), (void) 0)
77 #define atomic_sub_explicit(RMW, OPERAND, ORIG, ORDER) \
78 (*(ORIG) = __atomic_fetch_sub(RMW, OPERAND, ORDER), (void) 0)
79 #define atomic_or_explicit(RMW, OPERAND, ORIG, ORDER) \
80 (*(ORIG) = __atomic_fetch_or(RMW, OPERAND, ORDER), (void) 0)
81 #define atomic_xor_explicit(RMW, OPERAND, ORIG, ORDER) \
82 (*(ORIG) = __atomic_fetch_xor(RMW, OPERAND, ORDER), (void) 0)
83 #define atomic_and_explicit(RMW, OPERAND, ORIG, ORDER) \
84 (*(ORIG) = __atomic_fetch_and(RMW, OPERAND, ORDER), (void) 0)
86 #include "ovs-atomic-flag-gcc4.7+.h"