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<p>上一次拜读大概是3年前，当时还在上大学，印象最深的是不理解少平拒绝少安一起开厂做土财主，独自离家做了煤矿工人，每天在生死线边缘徘徊，靠体力挣着看似很多的工资。以及最后晓霞被淹死时我也鼻子一酸。再次就是最近，每天通勤路上，听书成了我最大的兴趣，应景的背景音乐与朗读者的语气带入，更加让人有沉浸的体验。
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<p>上篇已经介绍了libco切入切出的相关代码与流程，本文主要学习协程切换时寄存器以及运行时栈的变化，也会涉及扩展部分的相关内容：共享栈，协程控制，协程池。另外本文并非完全原创，多处代码解释参考<a href="http://km.oa.com/group/21362/articles/show/382180?kmref=search&from_page=1&no=2" target="_blank" rel="noopener">某大佬KM文章</a>，有的代码细节还没有看懂，也有的地方加入了自己的看法与见解。</p>
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<p>最近接到一个需求，需要从微信获取新token，每次获取微信都会更新最新的token，之前的token作废，每个token有一个过期时间，在此过期时间内客户端可直接拿去校验，不用重新获取。有点触及只是盲区，经老大指点了解下分布式锁，这里记录学习下基于redis实现的分布式锁。<br>
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<a class="post-title-link" href="/2020/06/21/emscripten-protobuf踩坑之旅/" itemprop="url">emscripten & protobuf踩坑之旅</a></h1>
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<p>WebAssembly是一种运行在浏览器虚拟机中的新的机器码指令格式，简称wasm。emscripten就是可以将C/C++，JAVA等高级语言代码库编译为wasm的一种编译工具。为了能够在前端高效应用大量现存的C/C++库完成音视频，游戏，机器视觉等计算密集型的功能。简单的说，<strong>因为浏览器只能跑js代码，wasm的出现就是为了其他语言的代码也可以在浏览器里运行，emscripten就是可以将其他语言编译成wasm的编译工具。</strong><br>
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<p>最近新的项目需要抛弃svn使用git，之前对git一脸懵逼仅限于会拼写，趁这几天不算忙学习记录下。<br>
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