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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 operation primitives on Clang. */
#ifndef IN_OVS_ATOMIC_H
#error "This header should only be included indirectly via ovs-atomic.h."
#endif
#define OVS_ATOMIC_CLANG_IMPL 1
#define ATOMIC(TYPE) _Atomic(TYPE)
#define ATOMIC_VAR_INIT(VALUE) (VALUE)
#define atomic_init(OBJECT, VALUE) __c11_atomic_init(OBJECT, VALUE)
/* Clang hard-codes these exact values internally but does not appear to
* export any names for them. */
typedef enum {
memory_order_relaxed = 0,
memory_order_consume = 1,
memory_order_acquire = 2,
memory_order_release = 3,
memory_order_acq_rel = 4,
memory_order_seq_cst = 5
} memory_order;
#define atomic_thread_fence(ORDER) __c11_atomic_thread_fence(ORDER)
#define atomic_signal_fence(ORDER) __c11_atomic_signal_fence(ORDER)
#define atomic_store(DST, SRC) \
atomic_store_explicit(DST, SRC, memory_order_seq_cst)
#define atomic_store_explicit(DST, SRC, ORDER) \
__c11_atomic_store(DST, SRC, ORDER)
#define atomic_read(SRC, DST) \
atomic_read_explicit(SRC, DST, memory_order_seq_cst)
#define atomic_read_explicit(SRC, DST, ORDER) \
(*(DST) = __c11_atomic_load(SRC, ORDER), \
(void) 0)
#define atomic_add(RMW, ARG, ORIG) \
atomic_add_explicit(RMW, ARG, ORIG, memory_order_seq_cst)
#define atomic_sub(RMW, ARG, ORIG) \
atomic_sub_explicit(RMW, ARG, ORIG, memory_order_seq_cst)
#define atomic_or(RMW, ARG, ORIG) \
atomic_or_explicit(RMW, ARG, ORIG, memory_order_seq_cst)
#define atomic_xor(RMW, ARG, ORIG) \
atomic_xor_explicit(RMW, ARG, ORIG, memory_order_seq_cst)
#define atomic_and(RMW, ARG, ORIG) \
atomic_and_explicit(RMW, ARG, ORIG, memory_order_seq_cst)
#define atomic_add_explicit(RMW, ARG, ORIG, ORDER) \
(*(ORIG) = __c11_atomic_fetch_add(RMW, ARG, ORDER), (void) 0)
#define atomic_sub_explicit(RMW, ARG, ORIG, ORDER) \
(*(ORIG) = __c11_atomic_fetch_sub(RMW, ARG, ORDER), (void) 0)
#define atomic_or_explicit(RMW, ARG, ORIG, ORDER) \
(*(ORIG) = __c11_atomic_fetch_or(RMW, ARG, ORDER), (void) 0)
#define atomic_xor_explicit(RMW, ARG, ORIG, ORDER) \
(*(ORIG) = __c11_atomic_fetch_xor(RMW, ARG, ORDER), (void) 0)
#define atomic_and_explicit(RMW, ARG, ORIG, ORDER) \
(*(ORIG) = __c11_atomic_fetch_and(RMW, ARG, ORDER), (void) 0)
#include "ovs-atomic-flag-gcc4.7+.h"
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