54c389dbc0
The requirements for BIND 9.17+ now requires C11 support from the compiler, so we can safely drop most of the stdatomic.h shims from lib/isc/unix/include/stdatomic.h. This commit removes support for clang atomic builtins (clang >= 3.6.0 includes stdatomic.h header) and for Gcc __sync builtins. The only compatibility shim that remains is support for __atomic builtins for Gcc >= 4.7.0 since CentOS 7 still includes only Gcc 4.8.1 and the proper stdatomic.h header was only introduced in Gcc >= 4.9.
72 lines
2.9 KiB
C
72 lines
2.9 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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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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/*
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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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