2 * Copyright (c) 2013 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_flag on Clang and 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."
27 #define ATOMIC_FLAG_INIT { .b = false }
30 atomic_flag_test_and_set_explicit(volatile atomic_flag *object,
33 return __atomic_test_and_set(&object->b, order);
37 atomic_flag_test_and_set(volatile atomic_flag *object)
39 return atomic_flag_test_and_set_explicit(object, memory_order_seq_cst);
43 atomic_flag_clear_explicit(volatile atomic_flag *object, memory_order order)
45 __atomic_clear(object, order);
49 atomic_flag_clear(volatile atomic_flag *object)
51 atomic_flag_clear_explicit(object, memory_order_seq_cst);