本文主要是介绍tars源码漫谈第31篇------tc_readers_writer_data.h（读写数据类），希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
tc_readers_writer_data中的代码为：
/*** Tencent is pleased to support the open source community by making Tars available.** Copyright (C) 2016THL A29 Limited, a Tencent company. All rights reserved.** Licensed under the BSD 3-Clause License (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at** https://opensource.org/licenses/BSD-3-Clause** 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 __TC_READERS_WRITER_DATA_H__
#define __TC_READERS_WRITER_DATA_H__namespace tars
{/
/** * @file tc_reader_writer_data.h * @brief 双buff类，多读一写数据的封装* 常用于数据量比较小的字典数据、配置数据.*/
/
template<typename T>
class TC_ReadersWriterData
{
public:TC_ReadersWriterData() : reader_using_inst0_(true){}virtual ~TC_ReadersWriterData() {}//获取读取的数据virtual T& getReaderData() {if(reader_using_inst0_) {return inst0_;}else {return inst1_;}}//获取可写的数据virtual T& getWriterData() {if(reader_using_inst0_) {return inst1_;}else {return inst0_;}}//写完数据以后，将读写数据交换virtual void swap() {reader_using_inst0_ = !reader_using_inst0_;}private:T inst0_;T inst1_;bool reader_using_inst0_;
};}
#endif
这是一个类模板， 有两个数据inst0_， inst1_， 类型一致， 很简单， 有针对性地返回其中之一。
待看后面怎么用。
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