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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 GCC 4.7 and later. */
#ifndef IN_OVS_ATOMIC_H
#error "This header should only be included indirectly via ovs-atomic.h."
#endif
#define ATOMIC(TYPE) TYPE
typedef enum {
memory_order_relaxed = __ATOMIC_RELAXED,
memory_order_consume = __ATOMIC_CONSUME,
memory_order_acquire = __ATOMIC_ACQUIRE,
memory_order_release = __ATOMIC_RELEASE,
memory_order_acq_rel = __ATOMIC_ACQ_REL,
memory_order_seq_cst = __ATOMIC_SEQ_CST
} memory_order;
#define ATOMIC_VAR_INIT(VALUE) (VALUE)
#define atomic_init(OBJECT, VALUE) (*(OBJECT) = (VALUE), (void) 0)
#define atomic_thread_fence __atomic_thread_fence
#define atomic_signal_fence __atomic_signal_fence
#define atomic_is_lock_free __atomic_is_lock_free
#define atomic_store(DST, SRC) \
atomic_store_explicit(DST, SRC, memory_order_seq_cst)
#define atomic_store_explicit __atomic_store_n
#define atomic_read(SRC, DST) \
atomic_read_explicit(SRC, DST, memory_order_seq_cst)
#define atomic_read_explicit(SRC, DST, ORDER) \
(*(DST) = __atomic_load_n(SRC, ORDER), \
(void) 0)
#define atomic_compare_exchange_strong(DST, EXP, SRC) \
atomic_compare_exchange_strong_explicit(DST, EXP, SRC, \
memory_order_seq_cst, \
memory_order_seq_cst)
#define atomic_compare_exchange_strong_explicit(DST, EXP, SRC, ORD1, ORD2) \
__atomic_compare_exchange_n(DST, EXP, SRC, false, ORD1, ORD2)
#define atomic_compare_exchange_weak(DST, EXP, SRC) \
atomic_compare_exchange_weak_explicit(DST, EXP, SRC, \
memory_order_seq_cst, \
memory_order_seq_cst)
#define atomic_compare_exchange_weak_explicit(DST, EXP, SRC, ORD1, ORD2) \
__atomic_compare_exchange_n(DST, EXP, SRC, true, ORD1, ORD2)
#define atomic_add(RMW, OPERAND, ORIG) \
atomic_add_explicit(RMW, OPERAND, ORIG, memory_order_seq_cst)
#define atomic_sub(RMW, OPERAND, ORIG) \
atomic_sub_explicit(RMW, OPERAND, ORIG, memory_order_seq_cst)
#define atomic_or(RMW, OPERAND, ORIG) \
atomic_or_explicit(RMW, OPERAND, ORIG, memory_order_seq_cst)
#define atomic_xor(RMW, OPERAND, ORIG) \
atomic_xor_explicit(RMW, OPERAND, ORIG, memory_order_seq_cst)
#define atomic_and(RMW, OPERAND, ORIG) \
atomic_and_explicit(RMW, OPERAND, ORIG, memory_order_seq_cst)
#define atomic_add_explicit(RMW, OPERAND, ORIG, ORDER) \
(*(ORIG) = __atomic_fetch_add(RMW, OPERAND, ORDER), (void) 0)
#define atomic_sub_explicit(RMW, OPERAND, ORIG, ORDER) \
(*(ORIG) = __atomic_fetch_sub(RMW, OPERAND, ORDER), (void) 0)
#define atomic_or_explicit(RMW, OPERAND, ORIG, ORDER) \
(*(ORIG) = __atomic_fetch_or(RMW, OPERAND, ORDER), (void) 0)
#define atomic_xor_explicit(RMW, OPERAND, ORIG, ORDER) \
(*(ORIG) = __atomic_fetch_xor(RMW, OPERAND, ORDER), (void) 0)
#define atomic_and_explicit(RMW, OPERAND, ORIG, ORDER) \
(*(ORIG) = __atomic_fetch_and(RMW, OPERAND, ORDER), (void) 0)
#include "ovs-atomic-flag-gcc4.7+.h"
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