大约有 46,000 项符合查询结果(耗时:0.0550秒) [XML]

https://www.tsingfun.com/it/tech/1318.html 

不同品牌的防火墙组成高可靠性集群 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...主防火墙出现问题的时候,可以自动切换到备防火墙上。一台设备 ASG 425 支持OSPF...拓扑如下 主机A ,B有两个可用路由要实现主备切换,当主防火墙出现问题的时候,可以自动切换到备防火墙上。 一台设备 ASG 425 支持O...
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一个故事告诉你比特币的原理及运作机制 - 创意 - 清泛网 - 专注C/C++及内核技术

...当前所有的交易记录。 此言一出,下面立刻炸锅了。一条还无所谓,但是二条简直无法接受,因为账簿可是记录了所有村民的交易,这样大家的隐私不全暴露了吗。 中本聪倒是不慌不忙,拿出了一对奇怪的东西。 身份...
https://www.tsingfun.com/it/cpp/2163.html 

select、poll、epoll之间的区别总结[整理] - C/C++ - 清泛网 - 专注C/C++及内核技术

...要监听的事件类型;epoll_wait则是等待事件的产生。 对于一个缺点,epoll的解决方案在epoll_ctl函数中。每次注册新的事件到epoll句柄中时(在epoll_ctl中指定EPOLL_CTL_ADD),会把所有的fd拷贝进内核,而不是在epoll_wait的时候重复拷...
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Why does C++11 not support designated initializer lists as C99? [closed]

... standard: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0329r4.pdf This brings limited support for c99's Designated Initializers. This limitation is described as follows by C.1.7[diff.decl].4, given: struct A { int x, y; }; struct B { struct A a; }; The following Designated Initializa...
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Specifying and saving a figure with exact size in pixels

...I is not supported by all backends. Here, the PNG backend is used, but the pdf and ps backends will implement the size differently. Also, changing the DPI and sizes will also affect things like fontsize. A larger DPI will keep the same relative sizes of fonts and elements, but if you want smaller fo...
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Disabling browser print options (headers, footers, margins) from page?

...from the margins; see What does the mozdisallowselectionprint attribute in PDF.js do?. Other browsers Unfortunately, there seems to be no way to resolve this problem in Internet Explorer, so you'll have to resort to PDF or ask users to disable margin texts. The same goes for Safari; according to a c...
https://www.tsingfun.com/it/cpp/2162.html 

Socket send函数和recv函数详解以及利用select()函数来进行指定时间的阻塞 ...

...务器则通常用send函数来向客户程序发送应答。 该函数的一个参数指定发送端套接字描述符; 二个参数指明一个存放应用程序要发送数据的缓冲区; 三个参数指明实际要发送的数据的字节数; 四个参数一般置0。 这...
https://www.tsingfun.com/it/cpp/1094.html 

怎么往SetTimer的回调函数传递参数 - C/C++ - 清泛网 - 专注C/C++及内核技术

...处理机制;2.怎么往SetTimer的回调函数传递参数。首先看一个问题,我们都知道 windows是消 息驱动的...本文说明两个问题:1.windows的消息处理机制;2.怎么往SetTimer的回调函数传递参数。 首先看一个问题,我们都知道 windows是...
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Why can't C++ be parsed with a LR(1) parser?

...biguities". It goes on to give a number of examples (see page 147 of the pdf). The example is: int(x), y, *const z; meaning int x; int y; int *const z; Compare to: int(x), y, new int; meaning (int(x)), (y), (new int)); (a comma-separated expression). The two token sequences have the ...
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Apache两种工作模式区别及配置切换 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...pache两种工作模式区别及配置切换1、Redhat Linux下查看apache本号在Apache安装目录bin下,使用以下命令查看即可。使用命令:. httpd -v示例:2、查看Apache当前工作模...1、Redhat Linux下查看apache本号 在Apache安装目录bin下,使用以下...