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What is the meaning of “__attribute__((packed, aligned(4))) ”

...gned(1))) sSampleStruct; so the above specified gcc attribute does not allow the structure padding. so the size will be 8 bytes. If you wish to do the same for all the structures, simply we can push the alignment value to stack using #pragma #pragma pack(push, 1) //Structure 1 ...... //Stru...
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十年磨一“饼” 一个70后连续创业者的心路历程 - 资讯 - 清泛网 - 专注C/C+...

...了赛百味亚洲总部的ALAN老师关于很多标准化和供应链的问题(他在新加坡亚洲总部负责产品开发及供应链管理). 接下来讲讲我们现在的团队:“菜鸟也有鹰的梦想”—— 操心的货当家“狮子”,草根乐观的烹饪师“王储”,务...
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Is multiplication and division using shift operators in C actually faster?

...n to shift, shift. If you mean to multiply, multiply. Do what is semantically clearest--your coworkers will thank you later. Or, more likely, curse you later if you do otherwise. share | improve ...
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CoInitialize浅析一 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术

...作都在当前线程内部进行,因此也就不存在多线程同步的问题;而对于一些全局信息的修改则都进行了保护。 CoInitialize 浅析
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Sleep for milliseconds

... cout << "urrrrggghhhh!" << endl; } Corrected code - now CPU stays in IDLE state [2014.05.24]: #include <iostream> #ifdef _WIN32 #include <windows.h> #else #include <unistd.h> #endif // _WIN32 using namespace std; void sleepcp(int milliseconds); void s...
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[科普] __MACOSX是什么文件夹? - 更多技术 - 清泛网 - 专注C/C++及内核技术

...者就可以把这个压缩包上传到网上供人下载。但是有一个问题,苹果公司和其它的大的软件公司一样,十分擅长曲解和附会用户的意思,它很多时候并不是完全按照你的意思去做的。例如在这种情况下,你以为Mac仅仅是把你想要...
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Best approach to remove time part of datetime in SQL Server

...er SQL Server optimiser versions managing CAST to date correctly, but generally it will be a bad idea ... Edit, Sep 2018, for datetime2 DECLARE @datetime2value datetime2 = '02180912 11:45' --this is deliberately within datetime2, year 0218 DECLARE @datetime2epoch datetime2 = '19000101' select DAT...
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【解决】模拟器启动失败:ERROR: x86_64 emulation currently requires har...

...lator: ERROR: x86_64 emulation currently requires hardware acceleration! CPU acceleration status: Hill is not installed on this machine 解决方法: 安装硬件加速器,路径: ....\resources\app.asar.unpacked\Emulator\from-Android-SDK\extras\intel\Hardware_Accelerated_Execution_Manag...
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What is “vectorization”?

...vec" instructions, and even some ARM chips have a vector instruction set, called NEON. "Vectorization" (simplified) is the process of rewriting a loop so that instead of processing a single element of an array N times, it processes (say) 4 elements of the array simultaneously N/4 times. (I chose 4...
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What integer hash function are good that accepts an integer hash key?

...mple) and has no common factors with it. This way the hash function covers all your hash space uniformly. Edit: The biggest disadvantage of this hash function is that it preserves divisibility, so if your integers are all divisible by 2 or by 4 (which is not uncommon), their hashes will be too. Thi...