select function

First, the summary Winsock provides both socket mode and socket I/O models, which control the I/O behavior on a socket. Where the socket pattern is used to determine the behavior of those Winsock functions when called with a socket. On the

1.1 file descriptorThe file descriptor (fd) is equivalent to the file handle in windows programming. It enables a non-negative integer to reference an open file.In Unix, the file descriptor 0 (STDIN_FILENO) is the standard output, 1 (STDOUT_FILENO)

Android phone system overview First, let alone all the concepts of Android to study the most basic descriptions of the telephone system. Our mobile phone was first used for phone calls, followed by a phone book, followed by PIM, followed by network

JavaScript form processing implementation code, javascript form 1. Form Introduction In HTML, the form is represented by the element, while in JavaScript, the form corresponds to the HTMLFormElement type; // HTMLFormElement inherits HTMLElement.

Notes for writing JavaScript text box scripts, javascript text box In HTML, there are two ways to express the text box: One is a single line text that uses the input element, and the other is a multi-line text box that uses textarea. When using the

Original article link Introduction We know that GUI applicationsProgramAll are event-driven. Most of these events come from users, such as Keyboard Events, mouse events, or pen point events. There are also some events from the system, such as

In the high-performance I/O design, there are two well-known modes: reactor and proactor. The reactor mode is used to synchronize I/O, while the proactor is used for asynchronous I/O operations.   Before comparing these two modes, we should first

With the development and popularization of Intenet, networks are widely used in embedded systems. more and more embedded devices use Linux operating systems. Linux is a free operating system with open source code and is highly portable. Therefore,

Select function The Select function is primarily used to implement multiplexed input and output models, and select system calls are used to allow us to monitor changes in the state of multiple file handles. The program stops waiting at select

What is the difference between synchronous (synchronous) IO and asynchronous (asynchronous) Io, what is blocking (blocking) IO and non-blocking (non-blocking) IO respectively? The problem is that different people may give different answers, such as

introduction of five I/O models(1) blocking i/o[default] When the upper app invokes the RECV system call, if the peer does not send data (there is no data in the Linux kernel buffer), the upper application Application1 will block, and when the peer

Recently encountered some common concepts, especially the concept of network programming, such as: blocking, non-blocking, asynchronous I/O and so on, for these concepts themselves are not too clear understanding, but very vague concept, said

This section is a premium socket I/O.Set the socket timeout alarm to use a more convenient data transfer function.There are three ways to timeout the socket I/O Setup operation: Transfer alarm performance, when produced, it specifies the

Reprinted from http://blog.csdn.net/zhoudaxia/article/details/8974779What is the difference between synchronous (synchronous) IO and asynchronous (asynchronous) Io, what is blocking (blocking) IO and non-blocking (non-blocking) IO respectively? The

From http://www.cppblog.com/converse/archive/2009/05/13/82879.html First, we will explain the concepts of synchronization and Asynchronization. Notification Mechanism of messages Related. For example, if I go to a bank to handle business

var select= (function () {The idea of customizing the Select method:1> defines a support object. The ability to handle the methods that need to be used to get the method2> need to use a possible compatibility method, define a function that can

High-performance IO Design Mode: blocking/non-blocking, synchronous/asynchronous parsing, io Design Mode When it comes to high performance, I think everyone like this. Today we will mainly understand several key concepts in high performance I/O

On a "chat chat synchronous, asynchronous, blocking and non-blocking" has been popular explanation, to understand the synchronous, asynchronous, blocking and non-blocking important two conceptual points, have not seen, it is recommended to read this

//Network programming service side/** Note: Because client code, helper method code and Epoll are the same, select only shows server-side code*/#include#include#includestring.h>#include#include#include#include#include//htons () function header

More than 15.4 customers so far, this chapter has been about using sockets to implement local and cross-network client/server systems. Once the connection is established, the socket connection behaves like an open underlying file descriptor, and in