Programmer Think

Summary: when a normal thread throws an exception, it cannot be caught externally. When such an exception is thrown, the thread will end. The main thread and other threads are not affected at all, and the exception thrown by a thread is completely unaware (that is, the exception cannot be caught at all). Solution: add an UncaughtExceptionHandl ...

Deep understanding of volatile pseudo sharing and volatile reordering in concurrent programming 1, Memory barrier What is a memory barrier Memory barrier, also known as memory barrier, memory barrier, barrier instruction, etc., is a kind of synchronous barrier instruction. It is a synchronization point in the operation of random acc ...

I Multithreading definition process A process is a path for program executionA system level application execution is a process thread Threads are inside a process. There can be multiple threads in a processConcurrent execution of multiple threads can improve the efficiency of the program and complete multiple tasks at the same ti ...

Preface This series is based on black horse videos: java Concurrent Programming I haven't finished yet. Overall, this is the best concurrent programming video I've ever seen. Here are notes based on videos. In the notes below, Java concurrent programming is also interspersed with an explanation of this book 1. Activeness 1. Deadlock ...

Method 1: inherit Thread class step Define a MyThread class and inherit the Thread classOverride the run method in the MyThread classCreate an object of the MyThread classStart thread MyThred class package com.cmy.threaddemo; /** * @author Ming Yong Chen */ public class MyThread extends Thread { /** * Method executed after t ...

semaphore Pronunciation: English[ ˈ sem ə f ɔː ®] Beauty[ ˈ sem ə f ɔː r] Semaphore (semaphore) provides a more powerful control method for multi-threaded cooperation, synchronized and reentrant lock. These two locks can only allow one thread to access one resource at a time, and semaphore can control how many threads can access specific ...

preface Sometimes we may encounter such a situation. We have a function that provides an http interface. We need to send a request to the http interface to start the service, but the service function may be executed for a long time. In this way, if the request result is returned after the function is executed, the request may timeout. client ...

18 Threads 18.1 Processes and Threads Process: Open a program and there will be at least one process. The basic unit of resource allocation by the operating system Threads: Threads are the basic unit of CPU scheduling, and each process has at least one thread. Single thread: only one thread def funa(): print(123) def funb(): print ...

catalogue Producer and consumer model Overview of producer and consumer models [application] Producer and consumer case [application] Producer and consumer case optimization [application] Basic use of blocking queue [understanding] Blocking queue realizes waiting wake-up mechanism [understanding] Producer and consumer model Overview ...

Multithreading The concept of multithreading When do I need multithreading ● the program needs to perform two or more tasks at the same time. ● when the program needs to realize some tasks that need to wait, such as user input, file reading and writing operation, network operation, search, etc. ● when some background programs are required. A ...