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https://github.com/openvswitch/ovs
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8917f72cbb
None of the atomic implementations need a destroy function anymore, so it's "more standard" and more convenient for users to get rid of them. Signed-off-by: Ben Pfaff <blp@nicira.com> Acked-by: Andy Zhou <azhou@nicira.com>
53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/*
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* Copyright (c) 2013, 2014 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* This header implements atomic_flag on Clang and on GCC 4.7 and later. */
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#ifndef IN_OVS_ATOMIC_H
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#error "This header should only be included indirectly via ovs-atomic.h."
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#endif
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/* atomic_flag */
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typedef struct {
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unsigned char b;
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} atomic_flag;
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#define ATOMIC_FLAG_INIT { .b = false }
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static inline bool
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atomic_flag_test_and_set_explicit(volatile atomic_flag *object,
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memory_order order)
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{
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return __atomic_test_and_set(&object->b, order);
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}
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static inline bool
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atomic_flag_test_and_set(volatile atomic_flag *object)
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{
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return atomic_flag_test_and_set_explicit(object, memory_order_seq_cst);
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}
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static inline void
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atomic_flag_clear_explicit(volatile atomic_flag *object, memory_order order)
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{
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__atomic_clear(object, order);
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}
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static inline void
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atomic_flag_clear(volatile atomic_flag *object)
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{
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atomic_flag_clear_explicit(object, memory_order_seq_cst);
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}
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