Replace arch specific atomic.h with global atomic.h header using either stdatomic, __atomic or __sync primitives
This commit is contained in:
Ondřej Surý
@@ -18,7 +18,7 @@ VERSION=@BIND9_VERSION@
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# machine generated. The latter are handled specially in the
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# install target below.
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#
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HEADERS = aes.h app.h assertions.h backtrace.h base32.h base64.h \
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HEADERS = aes.h app.h assertions.h atomic.h backtrace.h base32.h base64.h \
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bind9.h buffer.h bufferlist.h \
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commandline.h counter.h crc64.h deprecated.h \
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errno.h error.h event.h eventclass.h \
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18
lib/isc/include/isc/atomic.h
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18
lib/isc/include/isc/atomic.h
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@@ -0,0 +1,18 @@
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/*
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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 http://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 HAVE_STDATOMIC_H
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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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146
lib/isc/include/isc/stdatomic.h
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146
lib/isc/include/isc/stdatomic.h
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@@ -0,0 +1,146 @@
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/*
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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 http://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 !defined(__has_feature)
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#define __has_feature(x) 0
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#endif
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#if !defined(__has_extension)
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#define __has_extension(x) __has_feature(x)
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#endif
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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
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#define __GNUC_PREREQ__(maj, min) 0
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#endif
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#endif
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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
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#endif
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#ifndef __ATOMIC_RELAXED
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#define __ATOMIC_RELAXED 0
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#endif
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#ifndef __ATOMIC_CONSUME
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#define __ATOMIC_CONSUME 1
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#endif
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#ifndef __ATOMIC_ACQUIRE
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#define __ATOMIC_ACQUIRE 2
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#endif
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#ifndef __ATOMIC_RELEASE
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#define __ATOMIC_RELEASE 3
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#endif
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#ifndef __ATOMIC_ACQ_REL
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#define __ATOMIC_ACQ_REL 4
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#endif
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#ifndef __ATOMIC_SEQ_CST
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#define __ATOMIC_SEQ_CST 5
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#endif
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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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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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#if defined(__CLANG_ATOMICS) /* __c11_atomic builtins */
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#define atomic_init(obj, desired) \
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__c11_atomic_init(obj, desired)
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#define atomic_load_explicit(obj, order) \
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__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_compare_exchange_strong_explicit(obj, expected, desired, succ, fail) \
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__c11_atomic_compare_exchange_strong_explicit(obj, expected, desired, succ, fail)
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#define atomic_compare_exchange_weak_explicit(obj, expected, desired, succ, fail) \
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__c11_atomic_compare_exchange_weak_explicit(obj, expected, desired, succ, fail)
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#elif defined(__GNUC_ATOMICS) /* __atomic builtins */
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#define atomic_init(obj, desired) \
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(*obj = desired)
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#define atomic_load_explicit(obj, order) \
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__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_compare_exchange_strong_explicit(obj, expected, desired, succ, 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, fail) \
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__atomic_compare_exchange_n(obj, expected, desired, 1, succ, fail)
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#else /* __sync builtins */
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#define atomic_init(obj, desired) \
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(*obj = desired)
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#define atomic_load_explicit(obj, order) \
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__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_compare_exchange_strong_explicit(obj, expected, desired, succ, fail) \
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({ \
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__typeof__(obj) __v; \
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_Bool __r; \
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__v = __sync_val_compare_and_swap(obj, *(expected), desired); \
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__r = *(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, fail) \
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atomic_compare_exchange_strong_explicit(obj, expected, desired, succ, fail)
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#endif
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#define atomic_load(obj) \
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atomic_load_explicit(obj, memory_order_seq_cst)
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#define atomic_store(obj) \
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atomic_store_explicit(obj, memory_order_seq_cst)
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#define atomic_fetch_add(obj) \
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atomic_fetch_add_explicit(obj, arg, memory_order_seq_cst)
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#define atomic_fetch_sub(obj) \
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atomic_fetch_sub_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, memory_order_seq_cst, 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, memory_order_seq_cst, memory_order_seq_cst)
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