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https://www.tsingfun.com/it/cpp/465.html 

Linux进程与线程总结 [推荐] - C/C++ - 清泛网 - 专注C/C++及内核技术

...塞,等待第一次释放互斥锁,而该线程已经处于阻塞状态无法释放第一被加锁的互斥量,这就直接导致死锁。Linux还有一种递归锁(RecursiveMutex),用PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP宏初始化pthread_mutex_t结构即可,同一个线程可以多...
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App Inventor 2 中文网 · 项目指南

...电教馆的网站AI伴侣2.2x版本,平台版本过旧,很多aix拓展无法运行,文档也是过旧的英文原版,参考意义不大。      中文网于 2023/12/02 同步过一次MIT最新代码(参考发布日志),AI伴侣更新到了最新2.69版,官方...
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转:postfix安装Q&A - 更多技术 - 清泛网 - 专注C/C++及内核技术

...m_mysql]# make 然后报错“make: *** [dynamic/pam_mysql.o] Error 1”无法尽心,没有生成pam_mysql.so模块。 A: 装mysql的devel和shared包吧,对应版本的,用mysql.com上面的就行 QUOTE: Q: 安装POSTFIX2.2.7出错 [root@mail postfix...
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How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?

...vices known to the system. A trimmed down example: # ll /sys/class/tty/ttyUSB* lrwxrwxrwx 1 root root 0 2012-03-28 20:43 /sys/class/tty/ttyUSB0 -> ../../devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4:1.0/ttyUSB0/tty/ttyUSB0/ lrwxrwxrwx 1 root root 0 2012-03-28 20:44 /sys/class/tty/ttyUSB1 ...
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几乎每次插USB时都会发生的事情 - 轻松一刻 - 清泛网 - 专注C/C++及内核技术

几乎每次插USB时都会发生的事情 事情
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Regex for string not ending with given suffix

...n is old but I could not find a better solution I post mine here. Find all USB drives but not listing the partitions, thus removing the "part[0-9]" from the results. I ended up doing two grep, the last negates the result: ls -1 /dev/disk/by-path/* | grep -P "\-usb\-" | grep -vE "part[0-9]*$" This...
https://www.tsingfun.com/it/bigdata_ai/335.html 

MongoDB副本集详解 优于以往的主从模式 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...节点一旦以仲裁者的身份加入集群,他就只能是仲裁者,无法将仲裁者配置为非仲裁者,反之也是一样。 另外一个集群最多只能使用一个仲裁者,额外的仲裁者拖累选举新Master节点的速度,同时也不能提供更好的数据安全性。 ...
https://www.tsingfun.com/it/cpp/1298.html 

OnNotify函数 ON_NOTIFY消息总结 - C/C++ - 清泛网 - 专注C/C++及内核技术

...只能是简单的通告消息。举个例子,BN_CLICKED通告消息,无法发送按下鼠标按键时鼠标的位置信息。 当Windows 3.x下的控件需要发送包括额外数据的通告消息时,它们使用各种特殊目的的消息,包括WM_CTLCOLOR, WM_VSCROLL, WM_HSCROLL, WM_DRA...
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How to run a program without an operating system?

...bare metal programming". To read from flash drive, you want to know what's USB, and you want to have some driver to work with this USB. The program on this drive would also have to be in some particular format, on some particular filesystem... This is something that boot loaders usually do, but your...
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内存调试技巧:C 语言最大难点揭秘 - C/C++ - 清泛网 - 专注C/C++及内核技术

...为内存错误是不可控制而又神秘的顽症,它们只能纠正,无法预防。 但事实并非如此。本文将让您在短时间内理解与良好内存相关的编码的所有本质: 正确的内存管理的重要性 内存错误的类别 内存编程的策略 结束语 ...