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https://www.tsingfun.com/it/cpp/2025.html 

AfxIsValidAddress 测试内存地址 - C/C++ - 清泛网 - 专注C/C++及内核技术

... 包含被测试内存的字节个数。 bReadWrite Specifies whether the memory is both for reading and writing (TRUE) or just reading (FALSE). 确定被测试内存是读写形式(真)还是只读形式(假)。 Return Value In debug builds, nonzero ...
https://www.tsingfun.com/it/cpp/2057.html 

[解决]错误对话框\"Encountered an improper argument.\" - C/C++ - 清泛网 - 专注C/C++及内核技术

...的容器 控件的索引导致的。比如:xxx::iterator it = ....; if (it != xxx.end...错误对话框如图: 出现此错误的原因一般是访问不存在的容器/控件的索引导致的。 比如: xxx::iterator it = ....; // if (it != xxx.end()) it->xxx = xxx; //如...
https://www.tsingfun.com/it/cpp/2090.html 

error C2664: “find_char”: 不能将参数 1 从“const char [14]”转换为“...

...g::size_type i = 0; while(i != s.size() && s[i] != c) ++i; if(i == s.size()) return string::npos; else return i; } int main(int argc, char *argv[]) { //字面值常量为const对象,调用出错 if(find_char("Hello, world.",'.') != string::npos) ...
https://www.tsingfun.com/it/cpp/2122.html 

MFC GDI获取文字的宽度及高度 - C/C++ - 清泛网 - 专注C/C++及内核技术

...小,部分代码如下:CDC* pDC = CDC::FromHandle(::GetDC(NULL)); if (pDC) ...使用CDC的GetTextExtent函数可以获取指定文字的大小,部分代码如下: CDC* pDC = CDC::FromHandle(::GetDC(NULL)); if (pDC) { CFont* pOldFont = pDC->SelectObject(&m_Font); ...
https://www.tsingfun.com/it/cpp/2128.html 

VC 对话框背景色覆盖CEdit背景色的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术

...CtlColor); // TODO: 在此更改 DC 的任何特性 //不变色 if (nCtlColor == CTLCOLOR_EDIT) return hbr; // TODO: 如果默认的不是所需画笔,则返回另一个画笔 return m_brushBg; } 这样,所有的Edit控件背景色自绘生效,如图: 控件类...
https://www.tsingfun.com/it/os_kernel/534.html 

Linux Glibc幽灵漏洞允许黑客远程获取系统权 - 操作系统(内核) - 清泛网 - ...

...yname_r(name,&resbuf, temp.buffer, sizeof(temp.buffer), &result, &herrno); if (strcmp(temp.canary, CANARY) !=0) { puts("vulnerable"); exit(EXIT_SUCCESS); } if (retval == ERANGE) { puts("notvulnerable"); exit(EXIT_SUCCESS); } puts("should nothappen"); exit(EXIT_FAILURE); } EOF [test] $ gcc GHOST.c -o...
https://www.tsingfun.com/it/tech/1060.html 

闲扯Nginx的accept_mutex配置 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...() and select(), this is called thundering herd problem. This is a problem if you have a lot of workers as in Apache (hundreds and more), but this insensible if you have just several workers as nginx usually has. Therefore turning accept_mutex off is as scheduling incoming connection by OS via selec...
https://www.tsingfun.com/it/tech/1066.html 

Linux日志切分工具:Logrotate - 更多技术 - 清泛网 - 专注C/C++及内核技术

...: #!/bin/sh /usr/sbin/logrotate /etc/logrotate.conf EXITVALUE=$? if [ $EXITVALUE != 0 ]; then /usr/bin/logger -t logrotate "ALERT exited abnormally with [$EXITVALUE]" fi exit 0 实际运行时,Logrotate会调用配置文件「/etc/logrotate.conf」: # see "man logrotate" for...
https://www.tsingfun.com/it/tech/1070.html 

PHP中的错误处理 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...:ob_start + error_get_last <?php ob_start(function($buffer) { if ($error = error_get_last()) { return var_export($error, true); } return $buffer; }); // Fatal error: Call to undefined function undefined_function() undefined_function(); ?> 第二种:regist...
https://www.tsingfun.com/it/tech/1259.html 

svn强制设定commit时写一定长度的日志 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...log "%REPOS%" -t "%TXN%" | findstr ".............................." > nul if %errorlevel% gtr 0 goto err exit 0 :err echo that logmessage contains at least 30 alphanumeric characters. Commit aborted! 1>&2 exit 1 想修改限制长度只需要增加或减少".............................."中...