xiaoxiang781216 commented on code in PR #17229: URL: https://github.com/apache/nuttx/pull/17229#discussion_r3264832727
########## arch/arm/src/am67/am67_atomic_fix.h: ########## @@ -0,0 +1,143 @@ +/**************************************************************************** + * arch/arm/src/am67/am67_atomic_fix.h + * + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. The + * ASF licenses this file to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance with the + * License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the + * License for the specific language governing permissions and limitations + * under the License. + * + ****************************************************************************/ + +#ifndef __ARCH_ARM_SRC_AM67_AM67_ATOMIC_FIX_H +#define __ARCH_ARM_SRC_AM67_AM67_ATOMIC_FIX_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#ifndef __ASSEMBLY__ + +#include <stdint.h> + +/**************************************************************************** + * Atomic Fallback Implementation + * + * Description: + * Provides a minimal atomic implementation fallback for toolchains or + * configurations where C11 <stdatomic.h> is not available. + * + * This implementation is NOT fully lock-free and relies on compiler + * barriers (DMB instructions) to ensure basic memory ordering on ARM + * architectures. + * + ****************************************************************************/ + +#if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L || defined(__STDC_NO_ATOMICS__) + +/**************************************************************************** + * Type Definitions + ****************************************************************************/ + +/* Basic integer atomic type (fallback implementation) */ + +typedef int atomic_int; + +/* Atomic flag type (fallback implementation) */ + +typedef int atomic_flag; + +/**************************************************************************** + * Atomic Macros + ****************************************************************************/ + +/* Initialize atomic variable with a value */ + +#define ATOMIC_VAR_INIT(value) (value) Review Comment: why not enable LIBC_ARCH_ATOMIC? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
