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/*
* Copyright (c) 2013, 2014 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* This header implements atomic_flag on Clang and on GCC 4.7 and later. */
#ifndef IN_OVS_ATOMIC_H
#error "This header should only be included indirectly via ovs-atomic.h."
#endif
/* atomic_flag */
typedef struct {
unsigned char b;
} atomic_flag;
#define ATOMIC_FLAG_INIT { .b = false }
static inline bool
atomic_flag_test_and_set_explicit(volatile atomic_flag *object,
memory_order order)
{
return __atomic_test_and_set(&object->b, order);
}
static inline bool
atomic_flag_test_and_set(volatile atomic_flag *object)
{
return atomic_flag_test_and_set_explicit(object, memory_order_seq_cst);
}
static inline void
atomic_flag_clear_explicit(volatile atomic_flag *object, memory_order order)
{
__atomic_clear(object, order);
}
static inline void
atomic_flag_clear(volatile atomic_flag *object)
{
atomic_flag_clear_explicit(object, memory_order_seq_cst);
}
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