mirror of
https://gitlab.isc.org/isc-projects/bind9
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b3de93e54c
clang-format now tries to keep the type-cast on the same line as the variable. Update the formatting.
225 lines
8.9 KiB
C
225 lines
8.9 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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#include <inttypes.h>
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#include <stdbool.h>
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#include <stddef.h>
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#if HAVE_UCHAR_H
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#include <uchar.h>
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#endif /* HAVE_UCHAR_H */
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#if !defined(__has_feature)
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#define __has_feature(x) 0
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#endif /* if !defined(__has_feature) */
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#if !defined(__has_extension)
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#define __has_extension(x) __has_feature(x)
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#endif /* if !defined(__has_extension) */
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#if !defined(__GNUC_PREREQ__)
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#if defined(__GNUC__) && defined(__GNUC_MINOR__)
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#define __GNUC_PREREQ__(maj, min) \
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((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
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#else /* if defined(__GNUC__) && defined(__GNUC_MINOR__) */
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#define __GNUC_PREREQ__(maj, min) 0
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#endif /* if defined(__GNUC__) && defined(__GNUC_MINOR__) */
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#endif /* if !defined(__GNUC_PREREQ__) */
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#if !defined(__CLANG_ATOMICS) && !defined(__GNUC_ATOMICS)
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#if __has_extension(c_atomic) || __has_extension(cxx_atomic)
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#define __CLANG_ATOMICS
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#elif __GNUC_PREREQ__(4, 7)
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#define __GNUC_ATOMICS
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#elif !defined(__GNUC__)
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#error "isc/stdatomic.h does not support your compiler"
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#endif /* if __has_extension(c_atomic) || __has_extension(cxx_atomic) */
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#endif /* if !defined(__CLANG_ATOMICS) && !defined(__GNUC_ATOMICS) */
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#define ATOMIC_VAR_INIT(x) x
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#ifndef __ATOMIC_RELAXED
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#define __ATOMIC_RELAXED 0
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#endif /* ifndef __ATOMIC_RELAXED */
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#ifndef __ATOMIC_CONSUME
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#define __ATOMIC_CONSUME 1
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#endif /* ifndef __ATOMIC_CONSUME */
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#ifndef __ATOMIC_ACQUIRE
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#define __ATOMIC_ACQUIRE 2
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#endif /* ifndef __ATOMIC_ACQUIRE */
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#ifndef __ATOMIC_RELEASE
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#define __ATOMIC_RELEASE 3
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#endif /* ifndef __ATOMIC_RELEASE */
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#ifndef __ATOMIC_ACQ_REL
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#define __ATOMIC_ACQ_REL 4
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#endif /* ifndef __ATOMIC_ACQ_REL */
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#ifndef __ATOMIC_SEQ_CST
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#define __ATOMIC_SEQ_CST 5
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#endif /* ifndef __ATOMIC_SEQ_CST */
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enum memory_order {
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memory_order_relaxed = __ATOMIC_RELAXED,
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memory_order_consume = __ATOMIC_CONSUME,
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memory_order_acquire = __ATOMIC_ACQUIRE,
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memory_order_release = __ATOMIC_RELEASE,
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memory_order_acq_rel = __ATOMIC_ACQ_REL,
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memory_order_seq_cst = __ATOMIC_SEQ_CST
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};
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typedef enum memory_order memory_order;
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#ifndef HAVE_UCHAR_H
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typedef uint_least16_t char16_t;
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typedef uint_least32_t char32_t;
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#endif /* HAVE_UCHAR_H */
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typedef bool atomic_bool;
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typedef char atomic_char;
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typedef signed char atomic_schar;
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typedef unsigned char atomic_uchar;
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typedef short atomic_short;
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typedef unsigned short atomic_ushort;
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typedef int atomic_int;
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typedef unsigned int atomic_uint;
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typedef long atomic_long;
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typedef unsigned long atomic_ulong;
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typedef long long atomic_llong;
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typedef unsigned long long atomic_ullong;
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typedef char16_t atomic_char16_t;
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typedef char32_t atomic_char32_t;
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typedef wchar_t atomic_wchar_t;
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typedef int_least8_t atomic_int_least8_t;
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typedef uint_least8_t atomic_uint_least8_t;
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typedef int_least16_t atomic_int_least16_t;
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typedef uint_least16_t atomic_uint_least16_t;
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typedef int_least32_t atomic_int_least32_t;
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typedef uint_least32_t atomic_uint_least32_t;
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typedef int_least64_t atomic_int_least64_t;
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typedef uint_least64_t atomic_uint_least64_t;
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typedef int_fast8_t atomic_int_fast8_t;
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typedef uint_fast8_t atomic_uint_fast8_t;
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typedef int_fast16_t atomic_int_fast16_t;
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typedef uint_fast16_t atomic_uint_fast16_t;
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typedef int_fast32_t atomic_int_fast32_t;
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typedef uint_fast32_t atomic_uint_fast32_t;
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typedef int_fast64_t atomic_int_fast64_t;
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typedef uint_fast64_t atomic_uint_fast64_t;
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typedef intptr_t atomic_intptr_t;
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typedef uintptr_t atomic_uintptr_t;
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typedef size_t atomic_size_t;
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typedef ptrdiff_t atomic_ptrdiff_t;
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typedef intmax_t atomic_intmax_t;
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typedef uintmax_t atomic_uintmax_t;
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#if defined(__CLANG_ATOMICS) /* __c11_atomic builtins */
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#define atomic_init(obj, desired) __c11_atomic_init(obj, desired)
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#define atomic_load_explicit(obj, order) __c11_atomic_load(obj, order)
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#define atomic_store_explicit(obj, desired, order) \
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__c11_atomic_store(obj, desired, order)
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#define atomic_fetch_add_explicit(obj, arg, order) \
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__c11_atomic_fetch_add(obj, arg, order)
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#define atomic_fetch_sub_explicit(obj, arg, order) \
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__c11_atomic_fetch_sub(obj, arg, order)
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#define atomic_fetch_and_explicit(obj, arg, order) \
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__c11_atomic_fetch_and(obj, arg, order)
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#define atomic_fetch_or_explicit(obj, arg, order) \
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__c11_atomic_fetch_or(obj, arg, order)
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#define atomic_compare_exchange_strong_explicit(obj, expected, desired, succ, \
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fail) \
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__c11_atomic_compare_exchange_strong_explicit(obj, expected, desired, \
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succ, fail)
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#define atomic_compare_exchange_weak_explicit(obj, expected, desired, succ, \
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fail) \
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__c11_atomic_compare_exchange_weak_explicit(obj, expected, desired, \
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succ, fail)
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#define atomic_exchange_explicit(obj, desired, order) \
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__c11_atomic_exchange_explicit(obj, expected, order)
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#elif defined(__GNUC_ATOMICS) /* __atomic builtins */
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#define atomic_init(obj, desired) (*obj = desired)
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#define atomic_load_explicit(obj, order) __atomic_load_n(obj, order)
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#define atomic_store_explicit(obj, desired, order) \
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__atomic_store_n(obj, desired, order)
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#define atomic_fetch_add_explicit(obj, arg, order) \
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__atomic_fetch_add(obj, arg, order)
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#define atomic_fetch_sub_explicit(obj, arg, order) \
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__atomic_fetch_sub(obj, arg, order)
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#define atomic_fetch_and_explicit(obj, arg, order) \
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__atomic_fetch_and(obj, arg, order)
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#define atomic_fetch_or_explicit(obj, arg, order) \
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__atomic_fetch_or(obj, arg, order)
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#define atomic_compare_exchange_strong_explicit(obj, expected, desired, succ, \
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fail) \
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__atomic_compare_exchange_n(obj, expected, desired, 0, succ, fail)
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#define atomic_compare_exchange_weak_explicit(obj, expected, desired, succ, \
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fail) \
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__atomic_compare_exchange_n(obj, expected, desired, 1, succ, fail)
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#define atomic_exchange_explicit(obj, desired, order) \
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__atomic_exchange_n(obj, desired, order)
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#else /* __sync builtins */
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#define atomic_init(obj, desired) (*obj = desired)
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#define atomic_load_explicit(obj, order) __sync_fetch_and_add(obj, 0)
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#define atomic_store_explicit(obj, desired, order) \
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do { \
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__sync_synchronize(); \
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*obj = desired; \
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__sync_synchronize(); \
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} while (0);
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#define atomic_fetch_add_explicit(obj, arg, order) \
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__sync_fetch_and_add(obj, arg)
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#define atomic_fetch_sub_explicit(obj, arg, order) \
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__sync_fetch_and_sub(obj, arg, order)
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#define atomic_fetch_and_explicit(obj, arg, order) \
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__sync_fetch_and_and(obj, arg, order)
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#define atomic_fetch_or_explicit(obj, arg, order) \
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__sync_fetch_and_or(obj, arg, order)
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#define atomic_compare_exchange_strong_explicit(obj, expected, desired, succ, \
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fail) \
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({ \
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__typeof__(obj) __v; \
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_Bool __r; \
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__v = (__typeof__(obj))__sync_val_compare_and_swap( \
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obj, *(expected), desired); \
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__r = ((__typeof__(obj))*(expected) == __v); \
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*(expected) = __v; \
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__r; \
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})
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#define atomic_compare_exchange_weak_explicit(obj, expected, desired, succ, \
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fail) \
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atomic_compare_exchange_strong_explicit(obj, expected, desired, succ, \
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fail)
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#define atomic_exchange_explicit(obj, desired, order) \
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__sync_lock_test_and_set(obj, desired)
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#endif /* if defined(__CLANG_ATOMICS) */
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#define atomic_load(obj) atomic_load_explicit(obj, memory_order_seq_cst)
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#define atomic_store(obj, arg) \
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atomic_store_explicit(obj, arg, memory_order_seq_cst)
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#define atomic_fetch_add(obj, arg) \
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atomic_fetch_add_explicit(obj, arg, memory_order_seq_cst)
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#define atomic_fetch_sub(obj, arg) \
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atomic_fetch_sub_explicit(obj, arg, memory_order_seq_cst)
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#define atomic_fetch_and(obj, arg) \
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atomic_fetch_and_explicit(obj, arg, memory_order_seq_cst)
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#define atomic_fetch_or(obj, arg) \
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atomic_fetch_or_explicit(obj, arg, memory_order_seq_cst)
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#define atomic_compare_exchange_strong(obj, expected, desired) \
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atomic_compare_exchange_strong_explicit(obj, expected, desired, \
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memory_order_seq_cst, \
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memory_order_seq_cst)
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#define atomic_compare_exchange_weak(obj, expected, desired) \
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atomic_compare_exchange_weak_explicit(obj, expected, desired, \
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memory_order_seq_cst, \
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memory_order_seq_cst)
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#define atomic_exchange(obj, desired) \
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atomic_exchange_explicit(obj, desired, memory_order_seq_cst)
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