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https://github.com/openvswitch/ovs
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31a3fc6e3e
This library should prove useful for the threading changes coming up. The following commit introduces one (very simple) user. Signed-off-by: Ben Pfaff <blp@nicira.com> Acked-by: Ethan Jackson <ethan@nicira.com>
63 lines
2.5 KiB
C
63 lines
2.5 KiB
C
/*
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* Copyright (c) 2013 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 operation primitives on compilers that
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* have built-in support for C11 <stdatomic.h> */
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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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#include <stdatomic.h>
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/* Nonstandard atomic types. */
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typedef _Atomic(uint8_t) atomic_uint8_t;
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typedef _Atomic(uint16_t) atomic_uint16_t;
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typedef _Atomic(uint32_t) atomic_uint32_t;
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typedef _Atomic(uint64_t) atomic_uint64_t;
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typedef _Atomic(int8_t) atomic_int8_t;
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typedef _Atomic(int16_t) atomic_int16_t;
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typedef _Atomic(int32_t) atomic_int32_t;
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typedef _Atomic(int64_t) atomic_int64_t;
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#define atomic_read(SRC, DST) \
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atomic_read_explicit(SRC, DST, memory_order_seq_cst)
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#define atomic_read_explicit(SRC, DST, ORDER) \
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(*(DST) = atomic_load_explicit(SRC, ORDER), \
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(void) 0)
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#define atomic_add(RMW, ARG, ORIG) \
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atomic_add_explicit(RMW, ARG, ORIG, memory_order_seq_cst)
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#define atomic_sub(RMW, ARG, ORIG) \
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atomic_sub_explicit(RMW, ARG, ORIG, memory_order_seq_cst)
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#define atomic_or(RMW, ARG, ORIG) \
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atomic_or_explicit(RMW, ARG, ORIG, memory_order_seq_cst)
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#define atomic_xor(RMW, ARG, ORIG) \
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atomic_xor_explicit(RMW, ARG, ORIG, memory_order_seq_cst)
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#define atomic_and(RMW, ARG, ORIG) \
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atomic_and_explicit(RMW, ARG, ORIG, memory_order_seq_cst)
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#define atomic_add_explicit(RMW, ARG, ORIG, ORDER) \
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(*(ORIG) = atomic_fetch_add_explicit(RMW, ARG, ORDER), (void) 0)
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#define atomic_sub_explicit(RMW, ARG, ORIG, ORDER) \
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(*(ORIG) = atomic_fetch_sub_explicit(RMW, ARG, ORDER), (void) 0)
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#define atomic_or_explicit(RMW, ARG, ORIG, ORDER) \
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(*(ORIG) = atomic_fetch_or_explicit(RMW, ARG, ORDER), (void) 0)
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#define atomic_xor_explicit(RMW, ARG, ORIG, ORDER) \
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(*(ORIG) = atomic_fetch_xor_explicit(RMW, ARG, ORDER), (void) 0)
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#define atomic_and_explicit(RMW, ARG, ORIG, ORDER) \
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(*(ORIG) = atomic_fetch_and_explicit(RMW, ARG, ORDER), (void) 0)
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