select call

The select function is easy to use, and its working principle is also known to everyone. However, it may not be strictly observed in actual use, and it is indeed difficult to fully comply with it unless it is not used. Select uses a bit table.

I. Select In Winsock # include Prototype IntSelect ( IntNFDs,Fd_set *Readfds,Fd_set *Writefds,Fd_set *Exceptfds,Const struct timeval *Timeout); NFDs: this parameter is ignored and only works for compatibility.Readfds: (optional) pointer pointing to

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Socketssockets, another way of communicating between processes. Prior IPC mechanisms can only be limited to a single computer system for resource sharing. The socket interface allows the process on one machine to communicate with the process on

The role of the SELECT function:Select () in the socket programming is still more important, but for beginners of the socket is not too fond of using Select () to write programs, they just used to write such as Conncet (), accept (), recv () Or

This article from the CSDN blog, reproduced please indicate the source: http://blog.csdn.net/unbutun/article/details/4722448 Round Robin FunctionConcepts and functions of round robinApplications that use non-blocking I/O usually use select () and

  Prototype Int Select (Int NFDs,Fd_set * Readfds,Fd_set * Writefds,Fd_set * Exceptfds,Const struct timeval * Timeout); NFDs: this parameter is ignored and only works for compatibility.Readfds: (optional) pointer pointing to a set of interfaces

Prototype Int select (Int NFDs,Fd_set * Readfds,Fd_set * Writefds,Fd_set * Exceptfds,Const struct timeval * Timeout); NFDs: this parameter is ignored and only works for compatibility.Readfds: (optional) pointer pointing to a set of interfaces

Learn With with by example: [SQL] View plaincopyprint? With -- Query the total salaries of departments and departments Dept_costs ( Select D. department_name, sum (E. Salary) dept_total From orders ments D, employees e Where D. department_id

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1. Select Model:Select model: Through a Fd_set collection management socket, after the socket requirements are met, the socket is notified. Let the socket work. Avoid sockets entering blocking mode and making unnecessary waits. Select the Fd_set

Php drop-down box If (! Isset ($ _ GLOBAL_NEWS_QIKAN_TYPES )){ $ _ GLOBAL_NEWS_QIKAN_TYPES = array ('1' => 'precat ', '2' => 'management column ', '3' => 'R & D? Technology ', '4' => 'market Express ', '5' => 'beebot home ', '6' =>

For socket, I don't want to know its history here. I just want to say that it is a process communication method at the time, in short, some API functions of the network library can be called to exchange data between processes distributed across

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I. SocketIntroduction Socket is a method of process communication. It calls some API functions of this network library to exchange data between processes distributed on different hosts. Several definitions: (1) IP Address: The network address

It is called a select model because it uses the SELECT function primarily to manage I/O. This model was designed from a UNIX system to allow applications that want to avoid blocking on socket calls to have the ability to manage multiple sockets.int

First, Socket Introduction Socket is a way of process communication, that is, some API functions that call this network library implement the data exchange between related processes distributed in different hosts. Several definitions: (1) IP address:

SelectThe essence is to use 32-bit 32-bit integer, that is, 32*32 = 1024, And the FD value is 1-1024. When the FD value exceeds the 1024 limit, you must modify the fd_setsize. In this case, you can identify the FD in the 32 * max value range.

First, Socket IntroductionSocket is a way of process communication, that is, some API functions that call this network library implement the data exchange between related processes distributed in different hosts.Several definitions:(1) IP address:

If you want to build a server application on Windows, you must consider the I/O model.Windows provides five I/O models: ■ Select );■ Asynchronous selection (WSAAsyncSelect );■ Event Selection (WSAEventSelect );■ Overlapping I/O (Overlapped I/O );■