tsecer

std::atomic from source to assemble---from gcc's perspective

摘要： intro c++11 introduces a lot of interesting features including atomic. Thinking about it, you may find std::atomic is actually a machine-dependent fea 阅读全文

posted @ 2026-06-07 18:37 tsecer 阅读(9) 评论(0) 推荐(0)

Where does the hash before .clean under buildtrees/<package>/src in vcpkg come from

摘要： intro If you inspect the structure of vcpkg in your local file system, you may notice that the source code of the package is located in a directory li 阅读全文

posted @ 2026-05-24 13:22 tsecer 阅读(24) 评论(0) 推荐(0)

how does git switch - work

摘要： intro Recently I encouter a scenario where I would like to switch between two branch frequently, I wonder if there is a fast switch like bash's cd - c 阅读全文

posted @ 2026-04-18 23:27 tsecer 阅读(15) 评论(0) 推荐(0)

how does openvpn client intercept local System-Wide traffic

摘要： intro When using a VPN, I want it to automatically handle all system-wide traffic, rather than just acting as an HTTP proxy. How does OpenVPN achieve 阅读全文

posted @ 2026-03-22 22:25 tsecer 阅读(2) 评论(0) 推荐(0)

how does openvpn server track clients connections

摘要： intro Openvpn server acts as a proxy for multiple clients. An intuitive deduction is that it will maintain a <protocol, src ip, dst ip, src port, dst 阅读全文

posted @ 2026-02-08 23:12 tsecer 阅读(1) 评论(0) 推荐(0)

Why can git clone work anonymously over HTTPS without an account but not over SSH on GitHub

摘要： intro There are mainly two ways to clone a repo from github: over HTTPS and ssh. A subtle difference can be noticed that the ssh address is not availa 阅读全文

posted @ 2026-01-27 22:26 tsecer 阅读(26) 评论(0) 推荐(0)

std::function如何抹平不同functor的类型和内存大小差别

摘要： intro std::function颇有类似于python这种动态语言的特性：同一个类型可以容纳函数指针，类对象，lambda表达式等不同类型的调用方法。它既有动态语言的运行时灵活，又有静态语言的编译时安全。更进一步，不同结构初始化的function可以放在同一个数组中。“数组”又是C/C++语阅读全文

posted @ 2025-12-06 20:30 tsecer 阅读(32) 评论(0) 推荐(0)

vim如何感知编辑文件及终端窗口大小被外部修改的实现比较

摘要： intro vim中编辑一个文件时，如果文件在vim外被修改，那么vim会提示： W11: Warning: File "tsecer.md" has changed since editing started See ":help W11" for more info. [O]K, (L)oad 阅读全文

posted @ 2025-12-02 22:41 tsecer 阅读(41) 评论(0) 推荐(0)

gcc如何传递C/C++函数的聚合类参数

摘要： intro 通常C/C++中函数一般不会直接传递一个结构，更多处于性能考虑都会传递一个const类型的结构引用/指针。但是既然语言本身支持这种语法功能，编译器必定就要有对应的实现/规范/标准：否则不同编译器(例如gcc和llvm)生成的二进制文件(lib库)之间就没有办法兼容。特别是聚合类对象(st 阅读全文

posted @ 2025-11-05 19:46 tsecer 阅读(28) 评论(0) 推荐(0)

gccgo如何实现golang运行时向特定interface的动态conversion(及和C++虚函数表的对比)

摘要： intro 在阅读k8s的源代码时，发现代码中有一个(一组)很简单粗暴的interface转换:将一个interface(storage对象)尝试向各种类型转换。golang中每个结构的method并不是在结构内定义，在类型转换的时候，运行时只要判断转换源实现了目的类型的所有method就可以成功完阅读全文

posted @ 2025-10-29 21:22 tsecer 阅读(30) 评论(0) 推荐(0)

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