blocking mode

Http://hi.baidu.com/evenque/blog/item/1ccfc63ffc3527c17d1e7188.html During network programming, we often see four call Methods: synchronous, asynchronous, blocking, and non-blocking. These methods are not easy to understand. The following is my

In Windows, the "non-blocking" mode is generally used. For the client socket Set enttype to ctnonblocking, indicating that the connection is non-blocking. When the service at the other end When the client socket attempts to read or write data, the

For many beginners, network communication Program Development, a common phenomenon is that it is difficult to start. Many concepts such as sync, async, block, and unblock are confusing for beginners, I only know it, so I don't know why. The

First, define a concept: Each TCP socket has a sending buffer and a receiving buffer in the kernel, the full duplex mode of TCP and the Sliding Window of TCP depend on the two independent buffers and the filling status of the buffer. The receiving

SynchronizationThe so-called synchronization means that when a function call is sent, the call will not return until the result is not obtained. According to this definition, most functions are called synchronously (such as sin and isdigit ). But in

In network programming, we often encounter the concepts of blocking, non-blocking, synchronous, and asynchronous. Many people are very confused. Now let's talk to everyone about my understanding of the two concepts. First, let's talk about blocking

Recv send blocking and non-blocking, recvsend Blocking Nt send (SOCKET s, const char FAR * buf, int len, int flags ); Both the client and server applications use the send function to send data to the other end of the TCP connection. The client

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

Synchronization refers to the communication mode in which the sender sends a packet only after the receiver sends a response.Asynchronous means that the sender sends the next packet instead of sending the response from the receiver. Csdn has

I have recently developed several multi-threaded network programming. I will summarize some of the things I have used here. 1. the blocking and non-blocking of socket encapsulates two functions for secure sending and receiving. However, in blocking

  The select model is the most common I/O model in Winsock. The core is to use the select function to manage I/O! The select function is used to determine whether data on a socket is readable or whether data can be written to a socket to prevent the

Windows method: U_long mode = 0;Ioctlsocket (S, fionbio, & mode );Control as blocking mode. U_long mode = 1;Ioctlsocket (S, fionbio, & mode );Non-blocking mode. Setsockopt () Description:Set Interface Options.# Include Int Pascal far setsockopt

List of redis queue Functions Common commands: Blpop deletes and obtains the first element in the list, or blocks it until one is available. Brpop deletes and obtains the last element in the list, or blocks it until there is a

Function Description: Manipulate file characteristics According to the file description.File Control function FcntlHeader file:#include #include Function Prototypes:int fcntl (int fd, int cmd);int fcntl (int fd, int cmd, long arg);int fcntl (int fd,

In the previous article--linux interprocess communication-Using anonymous pipelines, we saw how anonymous pipelines can be used to pass data between processes, as well as a flaw in the way that these processes are initiated by a common ancestor

In Linux, development often encounters many errors (setting errno), where Eagain is one of the more common errors (for example, in non-blocking operations).Literally, it is a hint to try again. This error often occurs when the application is doing

file operation: Procedure for file operation Open the file, get the file handle and assign a value to a variable Manipulating a file with a handle Close File The existing files are as followsSomehow, it seems the love I knew

Netty Series (i) Linux network IO Model I. BASIC conceptBefore formally starting the Linux IO model, let's introduce 5 basic concepts.1.1 User space and kernel spaceNow that the operating system is using virtual memory, the 32-bit operating system,

What is a network? The network is composed of nodes and lines, representing many objects and their interconnections. In mathematics, a network is a graph, which is generally thought to refer specifically to weighted graphs. In addition to the

1. Communicate with each other, first you must know who to communicate with, that is, the name of the other person, for the computer is the host name or IP address; the second party must abide by the rules of the agreement, not one to speak English,