text: /*
   * 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 compilers that
   * have built-in support for C11 <stdatomic.h>  */
  #ifndef IN_OVS_ATOMIC_H
  #error "This header should only be included indirectly via ovs-atomic.h."
  #endif
  
  #include <stdatomic.h>
  
  #define OMIT_STANDARD_ATOMIC_TYPES 1
  #define ATOMIC(TYPE) _Atomic(TYPE)
  
  #define atomic_read(SRC, DST) \
      atomic_read_explicit(SRC, DST, memory_order_seq_cst)
  #define atomic_read_explicit(SRC, DST, ORDER)   \
      (*(DST) = atomic_load_explicit(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) = atomic_fetch_add_explicit(RMW, ARG, ORDER), (void) 0)
  #define atomic_sub_explicit(RMW, ARG, ORIG, ORDER) \
      (*(ORIG) = atomic_fetch_sub_explicit(RMW, ARG, ORDER), (void) 0)
  #define atomic_or_explicit(RMW, ARG, ORIG, ORDER) \
      (*(ORIG) = atomic_fetch_or_explicit(RMW, ARG, ORDER), (void) 0)
  #define atomic_xor_explicit(RMW, ARG, ORIG, ORDER) \
      (*(ORIG) = atomic_fetch_xor_explicit(RMW, ARG, ORDER), (void) 0)
  #define atomic_and_explicit(RMW, ARG, ORIG, ORDER) \
      (*(ORIG) = atomic_fetch_and_explicit(RMW, ARG, ORDER), (void) 0)
  