select function

In Windows Socket, select () supports only 64 sockets at a time by default. (The next select () function in Linux can manage many sockets. generally, there are 4096 by default. although the select () function interface is the same, there is a huge

I. synchronous and asynchronousSynchronous/asynchronous, which are notifications of messages 1. ConceptsA. SynchronizationThe so-called synchronization means that when a function call is sent, the call will not return until the result is not

I. file input/output functions 1. Basic I/O functions Open: Allow programs to access files Close: Terminate File Access Print: file write string Write: Write the formatting information to the file. Printf: format the string and output it to the

From other people's blog to reprint this article, after the re-editing and typesetting to show this, do a knowledge point to save and learn.The Select function is used in non-blocking, when a socket or a set of sockets is signaled, the system

Original URL: http://www.cnblogs.com/alyssaCui/archive/2013/04/01/2993886.htmlPollPoll or select is familiar to most unix/linux programmers, and these two things are similar in principle, there is no significant difference in performance, but Select

When writing programs, we often use timers. First look at the Select function prototype as follows: Copy Code code as follows: int select (int Nfds, fd_set *readfds, Fd_set *writefds, Fd_set *exceptfds, struct timeval *timeout);

Thinkphp Framework is one of the most popular PHP frameworks in China, although it is not comparable with those of foreign countries, but the advantage is that, well, the Chinese manual is very comprehensive. A recent study of SQL injection, which

Reproduced from: http://blog.csdn.net/daijialin/article/details/231384Prior to JDK 1.4, Java IO Operations were concentrated in the Java.io package and were based on the streaming blocking (blocking) API. For most applications, such APIs are easy to

The recent study of Mjpg-streamer, found this article, feel good, took over. Turn from: http://www.linuxidc.com/Linux/2011-03/33022.htm In fact, learning is a process, at the beginning of the most difficult to accept, after the easy .... First,

In order to handle a large number of customer connection requests when the Linux socket server is short programming, the use of nonblocking I/O and multiplexing is required, select, poll, and Epoll are the I/O multiplexing provided by the Linux API,

DESCRIPTION the functions Gettimeofday and Settimeofday can and set the time as As a timezone. The TV argument is a timeval struct, as specified In : struct Timeval { time_t tv_sec; * Seconds * * suseconds_t tv_usec; * Microseconds * * }; The

Both reactor and preactor are Io multiplexing modes. Generally, the I/O multiplexing mechanism depends on an event multiplexing (EventDemultiplexer ). The splitter object can separate the I/O events from the event source and distribute them to the

If you want to have a kung pao chicken rice: Synchronous congestion: you order food at the restaurant, and then wait there, and you have to shout: Okay! Synchronous non-blocking: after ordering at the restaurant, you can walk the dog. But after a

Linux Kernel dynamic loading Module     1. Install the kernel module: General steps: (1) Run makemenuconfig in/usr/src/Linux/to mark the items to be compiled into modules (M), save and exit. (2) run make modules to generate *. O or *. Ko files under/

The select function can communicate with multiple sockets in a non-blocking manner.ProgramIt only demonstrates the use of the select function. The function is very simple. Even if a connection is closed, the current number of connections is not

This program is a course assignment for the last semester. At that time, I only had a little C language and data structure foundation for cross-professionals. For this reason, I checked a lot of information and added my own thoughts and analysis.

I like to explain some concepts by connecting to some phenomena in real life in my own language. When I can do this, it means that I have understood this concept. the concept to be explained today is: the difference between synchronous/asynchronous

First, we will explain the concepts of synchronous and asynchronous, which are related to the notification mechanism of messages. For example, if I go to a bank to handle business operations, I may choose to wait in queue or take a small note with

Android phone system-rild Rild is a local service started by the INIT process. This local service does not use communication methods such as binder, but uses Socket communication. RIL (radio interface layer) Android provides a RIL implementation

Background Introduction If the server wants to handle both socket connection requests on the network and local standard input command requests, then if we accept the connection request using accept, we cannot process the standard input request;