1 /* $NetBSD: atomic.h,v 1.6 2022/09/23 12:15:33 christos Exp $ */ 2 3 /* 4 * Copyright (C) Internet Systems Consortium, Inc. ("ISC") 5 * 6 * SPDX-License-Identifier: MPL-2.0 7 * 8 * This Source Code Form is subject to the terms of the Mozilla Public 9 * License, v. 2.0. If a copy of the MPL was not distributed with this 10 * file, you can obtain one at https://mozilla.org/MPL/2.0/. 11 * 12 * See the COPYRIGHT file distributed with this work for additional 13 * information regarding copyright ownership. 14 */ 15 16 #pragma once 17 18 #if HAVE_STDATOMIC_H 19 #include <stdatomic.h> 20 #else /* if HAVE_STDATOMIC_H */ 21 #include <isc/stdatomic.h> 22 #endif /* if HAVE_STDATOMIC_H */ 23 24 /* 25 * We define a few additional macros to make things easier 26 */ 27 28 /* Relaxed Memory Ordering */ 29 30 #define atomic_store_relaxed(o, v) \ 31 atomic_store_explicit((o), (v), memory_order_relaxed) 32 #define atomic_load_relaxed(o) atomic_load_explicit((o), memory_order_relaxed) 33 #define atomic_fetch_add_relaxed(o, v) \ 34 atomic_fetch_add_explicit((o), (v), memory_order_relaxed) 35 #define atomic_fetch_sub_relaxed(o, v) \ 36 atomic_fetch_sub_explicit((o), (v), memory_order_relaxed) 37 #define atomic_fetch_or_relaxed(o, v) \ 38 atomic_fetch_or_explicit((o), (v), memory_order_relaxed) 39 #define atomic_fetch_and_relaxed(o, v) \ 40 atomic_fetch_and_explicit((o), (v), memory_order_relaxed) 41 #define atomic_exchange_relaxed(o, v) \ 42 atomic_exchange_explicit((o), (v), memory_order_relaxed) 43 #define atomic_compare_exchange_weak_relaxed(o, e, d) \ 44 atomic_compare_exchange_weak_explicit( \ 45 (o), (e), (d), memory_order_relaxed, memory_order_relaxed) 46 #define atomic_compare_exchange_strong_relaxed(o, e, d) \ 47 atomic_compare_exchange_strong_explicit( \ 48 (o), (e), (d), memory_order_relaxed, memory_order_relaxed) 49 #define atomic_compare_exchange_strong_acq_rel(o, e, d) \ 50 atomic_compare_exchange_strong_explicit( \ 51 (o), (e), (d), memory_order_acq_rel, memory_order_acquire) 52 53 /* Acquire-Release Memory Ordering */ 54 55 #define atomic_store_release(o, v) \ 56 atomic_store_explicit((o), (v), memory_order_release) 57 #define atomic_load_acquire(o) atomic_load_explicit((o), memory_order_acquire) 58 #define atomic_fetch_add_release(o, v) \ 59 atomic_fetch_add_explicit((o), (v), memory_order_release) 60 #define atomic_fetch_sub_release(o, v) \ 61 atomic_fetch_sub_explicit((o), (v), memory_order_release) 62 #define atomic_fetch_and_release(o, v) \ 63 atomic_fetch_and_explicit((o), (v), memory_order_release) 64 #define atomic_fetch_or_release(o, v) \ 65 atomic_fetch_or_explicit((o), (v), memory_order_release) 66 #define atomic_exchange_acq_rel(o, v) \ 67 atomic_exchange_explicit((o), (v), memory_order_acq_rel) 68 #define atomic_fetch_sub_acq_rel(o, v) \ 69 atomic_fetch_sub_explicit((o), (v), memory_order_acq_rel) 70 #define atomic_compare_exchange_weak_acq_rel(o, e, d) \ 71 atomic_compare_exchange_weak_explicit( \ 72 (o), (e), (d), memory_order_acq_rel, memory_order_acquire) 73 #define atomic_compare_exchange_strong_acq_rel(o, e, d) \ 74 atomic_compare_exchange_strong_explicit( \ 75 (o), (e), (d), memory_order_acq_rel, memory_order_acquire) 76