Programmer Think

introduction In the previous article, we introduced the Semaphore of AQS ， and it should be countdown latch ， next. What is CountDownLatch CountDownLatch is implemented through a counter. The initial value of the counter is the number of threads. Every time a thread is executed, the value of the counter will be reduced by 1. When the value ...

CompletableFuture Asynchronization Asynchronization is the basis for the implementation of the parallel scheme. More specifically, it is the basis for the implementation of the core scheme of using multithreading to optimize performance. For example, two serial operations are handed over to a newly created sub thread for execution. The ma ...

preface RejectedExecutionException exception thrown by thread pool submission task on line That is, the task submission performs the operation of reject policy. Check the business situation and thread pool configuration. It is found that the number of tasks executed in parallel is less than the maximum number of threads in the thread pool. Th ...

Reference blog: https://angela.blog.csdn.net/article/details/105625514 1. Processes and threads An application is a process. A process can contain multiple threads. From the operating system level, threads in the same process share the resources of the process, such as memory space and file handle. Threads are lightweight processes in Linux op ...

Statement: This study note is a summary based on the tutorial and combined with your own learning situation. It is not original. If you want to see the original version, please see the C language Chinese network Multithreaded programming (C language + Linux) , the website has many good programming learning tutorials, especially about C language ...

This chapter mainly clarifies multithreading Processes and threads Process is the unit of system resource allocation, and thread is the unit of CPU scheduling and execution There are three ways to create threads Inherit Thread class (not recommended to avoid the limitation of OOP single inheritance) The custom Thread class inherits t ...

Introduction background of thread concept process We have known the concept of process in the operating system before. The program cannot run alone. Only when the program is loaded into memory, the system allocates resources for it, and this executed program is called a process. The difference between a program and a process is that a program ...

background I believe that many small partners in work will use thread pool, but the definition and use of thread pool is a complex process, because there are as many as 7 thread pool constructors alone, and the definition of each parameter is not a simple basic data structure. Just pass it in directly Therefore, some inexperienced partn ...

1 muduo::net::EchoServer class reference Collaboration diagram of EchoServer: [legend] Public member functionEchoServer (EventLoop *loop, const InetAddress &listenAddr)voidstart () Private member functionvoidonConnection (const TcpConnectionPtr &conn)voidonMessage (const TcpConnectionPtr &conn, Buffer *buf, Timestamp time) Pr ...

1, Why use distributed locks When developing applications, if we need multi-threaded synchronous access to a shared variable, we can use the Java multi-threaded processing we learned, and it can run perfectly without bugs! However, this is a stand-alone application, that is, all requests will be allocated to the JVM of the current server, and ...