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Diffstat (limited to 'lib/isc/include/isc/atomic.h')
| -rw-r--r-- | lib/isc/include/isc/atomic.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/lib/isc/include/isc/atomic.h b/lib/isc/include/isc/atomic.h new file mode 100644 index 0000000..5a415bc --- /dev/null +++ b/lib/isc/include/isc/atomic.h @@ -0,0 +1,79 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#if HAVE_STDATOMIC_H +#include <stdatomic.h> +#else +#include <isc/stdatomic.h> +#endif + +#include <isc/util.h> + +/* + * We define a few additional macros to make things easier + */ + +/* Relaxed Memory Ordering */ + +#define atomic_store_relaxed(o, v) \ + atomic_store_explicit((o), (v), memory_order_relaxed) +#define atomic_load_relaxed(o) atomic_load_explicit((o), memory_order_relaxed) +#define atomic_fetch_add_relaxed(o, v) \ + atomic_fetch_add_explicit((o), (v), memory_order_relaxed) +#define atomic_fetch_sub_relaxed(o, v) \ + atomic_fetch_sub_explicit((o), (v), memory_order_relaxed) +#define atomic_fetch_or_relaxed(o, v) \ + atomic_fetch_or_explicit((o), (v), memory_order_relaxed) +#define atomic_fetch_and_relaxed(o, v) \ + atomic_fetch_and_explicit((o), (v), memory_order_relaxed) +#define atomic_exchange_relaxed(o, v) \ + atomic_exchange_explicit((o), (v), memory_order_relaxed) +#define atomic_compare_exchange_weak_relaxed(o, e, d) \ + atomic_compare_exchange_weak_explicit( \ + (o), (e), (d), memory_order_relaxed, memory_order_relaxed) +#define atomic_compare_exchange_strong_relaxed(o, e, d) \ + atomic_compare_exchange_strong_explicit( \ + (o), (e), (d), memory_order_relaxed, memory_order_relaxed) +#define atomic_compare_exchange_strong_acq_rel(o, e, d) \ + atomic_compare_exchange_strong_explicit( \ + (o), (e), (d), memory_order_acq_rel, memory_order_acquire) + +/* Acquire-Release Memory Ordering */ + +#define atomic_store_release(o, v) \ + atomic_store_explicit((o), (v), memory_order_release) +#define atomic_load_acquire(o) atomic_load_explicit((o), memory_order_acquire) +#define atomic_fetch_add_release(o, v) \ + atomic_fetch_add_explicit((o), (v), memory_order_release) +#define atomic_fetch_sub_release(o, v) \ + atomic_fetch_sub_explicit((o), (v), memory_order_release) +#define atomic_fetch_and_release(o, v) \ + atomic_fetch_and_explicit((o), (v), memory_order_release) +#define atomic_fetch_or_release(o, v) \ + atomic_fetch_or_explicit((o), (v), memory_order_release) +#define atomic_exchange_acq_rel(o, v) \ + atomic_exchange_explicit((o), (v), memory_order_acq_rel) +#define atomic_fetch_sub_acq_rel(o, v) \ + atomic_fetch_sub_explicit((o), (v), memory_order_acq_rel) +#define atomic_compare_exchange_weak_acq_rel(o, e, d) \ + atomic_compare_exchange_weak_explicit( \ + (o), (e), (d), memory_order_acq_rel, memory_order_acquire) +#define atomic_compare_exchange_strong_acq_rel(o, e, d) \ + atomic_compare_exchange_strong_explicit( \ + (o), (e), (d), memory_order_acq_rel, memory_order_acquire) + +/* compare/exchange that MUST succeed */ +#define atomic_compare_exchange_enforced(o, e, d) \ + RUNTIME_CHECK(atomic_compare_exchange_strong((o), (e), (d))) |