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b061e86d17
it's a style violation to have REQUIRE or INSIST contain code that
must run for the server to work. this was being done with some
atomic_compare_exchange calls. these have been cleaned up. uses
of atomic_compare_exchange in assertions have been replaced with
a new macro atomic_compare_exchange_enforced, which uses RUNTIME_CHECK
to ensure that the exchange was successful.
(cherry picked from commit a499794984)
79 lines
3.1 KiB
C
79 lines
3.1 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* SPDX-License-Identifier: MPL-2.0
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, you can obtain one at https://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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#pragma once
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#if __STDC_VERSION__ >= 201112L && !defined(__STDC_NO_ATOMICS__)
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#include <stdatomic.h>
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#else
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#include <isc/stdatomic.h>
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#endif
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#include <isc/util.h>
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/*
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* We define a few additional macros to make things easier
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*/
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/* Relaxed Memory Ordering */
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#define atomic_store_relaxed(o, v) \
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atomic_store_explicit((o), (v), memory_order_relaxed)
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#define atomic_load_relaxed(o) atomic_load_explicit((o), memory_order_relaxed)
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#define atomic_fetch_add_relaxed(o, v) \
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atomic_fetch_add_explicit((o), (v), memory_order_relaxed)
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#define atomic_fetch_sub_relaxed(o, v) \
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atomic_fetch_sub_explicit((o), (v), memory_order_relaxed)
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#define atomic_fetch_or_relaxed(o, v) \
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atomic_fetch_or_explicit((o), (v), memory_order_relaxed)
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#define atomic_fetch_and_relaxed(o, v) \
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atomic_fetch_and_explicit((o), (v), memory_order_relaxed)
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#define atomic_exchange_relaxed(o, v) \
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atomic_exchange_explicit((o), (v), memory_order_relaxed)
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#define atomic_compare_exchange_weak_relaxed(o, e, d) \
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atomic_compare_exchange_weak_explicit( \
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(o), (e), (d), memory_order_relaxed, memory_order_relaxed)
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#define atomic_compare_exchange_strong_relaxed(o, e, d) \
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atomic_compare_exchange_strong_explicit( \
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(o), (e), (d), memory_order_relaxed, memory_order_relaxed)
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#define atomic_compare_exchange_strong_acq_rel(o, e, d) \
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atomic_compare_exchange_strong_explicit( \
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(o), (e), (d), memory_order_acq_rel, memory_order_acquire)
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/* Acquire-Release Memory Ordering */
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#define atomic_store_release(o, v) \
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atomic_store_explicit((o), (v), memory_order_release)
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#define atomic_load_acquire(o) atomic_load_explicit((o), memory_order_acquire)
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#define atomic_fetch_add_release(o, v) \
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atomic_fetch_add_explicit((o), (v), memory_order_release)
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#define atomic_fetch_sub_release(o, v) \
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atomic_fetch_sub_explicit((o), (v), memory_order_release)
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#define atomic_fetch_and_release(o, v) \
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atomic_fetch_and_explicit((o), (v), memory_order_release)
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#define atomic_fetch_or_release(o, v) \
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atomic_fetch_or_explicit((o), (v), memory_order_release)
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#define atomic_exchange_acq_rel(o, v) \
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atomic_exchange_explicit((o), (v), memory_order_acq_rel)
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#define atomic_fetch_sub_acq_rel(o, v) \
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atomic_fetch_sub_explicit((o), (v), memory_order_acq_rel)
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#define atomic_compare_exchange_weak_acq_rel(o, e, d) \
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atomic_compare_exchange_weak_explicit( \
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(o), (e), (d), memory_order_acq_rel, memory_order_acquire)
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#define atomic_compare_exchange_strong_acq_rel(o, e, d) \
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atomic_compare_exchange_strong_explicit( \
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(o), (e), (d), memory_order_acq_rel, memory_order_acquire)
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/* compare/exchange that MUST succeed */
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#define atomic_compare_exchange_enforced(o, e, d) \
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RUNTIME_CHECK(atomic_compare_exchange_strong((o), (e), (d)))
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