Programmer Think

Today we will use the famous pipe mkfifo to realize a simple version of QQ dialogue function. Step 1: first create two processes Talka C and talkb c； Step 2: talk a C and talkb C is responsible for checking whether two pipelines have been created. If not, it is necessary to create pipelines; Step 3: talk a C open pipe 1 in a write only mann ...

An introduction The topic of this section is to realize concurrency based on single thread, that is, to realize concurrency with only one main thread (obviously, there is only one available cpu). Therefore, we need to review the essence of concurrency first: switching + saving state. The cpu is running a task and will switch to execute oth ...

After reading the great God's paper, I ran by myself. I feel very interesting. I want to read the great God's code carefully. Anyway, it's better to treat it as a series of self entertainment~ MichaelFYang/far_planner: Fast, Attemptable Route Planner for Navigation in Known and Unknown Environments (github.com) graph_decoder series (1) First, ...

Analysis of NioEventLoopGroup's parent class and interface function of its implementation NioEventLoopGroup maintains a group of nioeventloops internally. The relationship between them is somewhat similar to the relationship between thread pool and thread. Its class diagram is as follows: Iterable and ScheduledExecutorService are provided by ...

There are thousands of people in the vast sea. Thank you for seeing here this second. I hope my article is helpful to you! May you keep your love and go to the mountains and seas in the future! 👀 preface Because some time ago, we need to use webService to call other system api interfaces of the company, but the request method is differe ...

1. Network architecture You need to understand the basic client server programming model and how to write client server programs that use services provided by the Internet. Finally, combine all the concepts to develop a small but full-featured web server. Nowadays, network applications can be seen everywhere. Interestingly, all network applica ...

OSI network seven layer model: (Open System Interconnection), translated as "Open System Interconnection" Physical layer, data link layer, network layer, transport layer, session layer, presentation layer and application layer TCP/IP simplifies OSI, merges some layers, and finally retains only four layers, including interface layer, ...

Section I overview of network communication 1.1 software structure Network programming is a program that realizes the communication between two computers under a certain protocol C/S structure: the full name is Client/Server structure, which refers to client and server structure. Common programs include QQ... And other software B/S struct ...

Recently, a project requirement is as follows: the software side will send a request to the server to obtain some information. Then process the acquired information and return the id of the information Method 1: the software side calls the interface and requests once a minute. The problem: if tens of thousands of people use the software at th ...

UDP communication principle: UDP protocol is an unreliable network protocol. It has a Socket object at both ends of the communication, but these two sockets are only the objects to send and receive data Both sides of communication based on UDP protocol have no so-called concept of client and server The datagram Socket class provided by Java i ...