大约有 9,000 项符合查询结果(耗时:0.0128秒) [XML]

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How efficient is locking an unlocked mutex? What is the cost of a mutex?

...ens often, then multiple locks would increase parallelism. At the cost of maintainability, since more locking means more debugging of the locking. How efficient is it to lock a mutex? I.e. how much assembler instructions are there likely and how much time do they take (in the case that the mutex...
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What's the difference between utf8_general_ci and utf8_unicode_ci?

..., utf8 is a flawed UTF-8 implementation from early MySQL versions which remains only for backward compatibility. The fixed version was given the name utf8mb4. Note: Newer versions of MySQL have updated Unicode sorting rules, available under names such as utf8mb4_0900_ai_ci for equivalent rules based...
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Algorithm to compare two images

...the copy may do stuff like rotating, making negative, or adding trivial details (as well as changing the dimension of the image). ...
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WinDbg基础资料(日本語) - IT优秀资料 - 清泛网 - 专注C/C++及内核技术

...--------------------------------------------------------- Tip02:WinXP Dump生成の方法 http://www.glamenv-septzen.net/view/918 C:\kktools\userdump8.1\x86>userdump -p userdump 1268 ------------------------------------------------------------------------------------------------------------...
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C++ 11特性 - 专题 - 清泛网 - 专注IT技能提升

c++11新特效,及高效使用的方法。
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程序员必知 —— 编程语言创始人 - 创意 - 清泛网 - 专注C/C++及内核技术

...发在Unix上运行的Emacs类编辑器Gosling Emacs(以C语言编写,使用Mocklisp作为扩展语言)。1983年获得了美国卡内基梅隆大学计算机科学博士学位,博士论文的题目是:"The Algebraic Manipulation of Constraints"。毕业后到IBM工作,设计IBM第一代...
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NSIS内置路径命令详解 - C/C++ - 清泛网 - 专注C/C++及内核技术

...命令,为读者解释常用命令的含义,适合nsis初学者学习使用。$INSTDIR=默认安装路径 ! $PROGRAMFILES=C:\Program Files! $TEMP=临时文件夹! $DESKTOP=桌面! $SYSDIR=C:\WINDOWS\system32! $EXEDIR=我的文档! $WINDIR=C:\WINDOWS! $STARTMENU=相对应用...
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stl 字符串std::string作为std::map主键key的实例 - C/C++ - 清泛网 - 专注C/C++及内核技术

...文通过一个实例介绍std::map字符串作为key的常见用法,并使用find_if实现map按value值查找。代码如下: #include <map> #include <string> #include <algorithm> using namespace std; class map_value_finder { public: map_value_finder(const std::string &cmp_stri...
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解决:参数 basepath 不能是相对路径?? - C/C++ - 清泛网 - 专注C/C++及内核技术

...性 -> 配置 -> 调试: 改成上图(即VS默认配置)即可,使用VS的宏变量,即使项目路径发生变化也不会有问题了。basepath 路径 参数
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std::vector find查找方法 - C/C++ - 清泛网 - 专注C/C++及内核技术

...or C3867: “std::vector<_Ty>::end”: 函数调用缺少参数列表;请使用“&std::vector<_Ty>::end”创建指向成员的指针vector find