the following code outputs pingpong. I don t quite understand why this System.out.print outputs before t.start. My idea is that pongping and pingpong should be output randomly, not in order. public class Test2 { public static void main(String ar...
Let me ask you a question : if you have just taken over a strange Spring application, the hang stops during startup, and the Spring container does not start or fail, so the hang is there all the time. There is no obvious error log in the business log (...
Let s ask my questions in the form of judgment questions. if a process creates a thread, the thread runs normally indefinitely (assuming so). Suddenly the process exits due to an exception, and the thread disappears and does not exist in the syste...
this is the concept of process thread concurrency cpu scheduling that I extracted from the network: process is a computing activity of programs that can be executed concurrently on a certain data set, and it is also the basic unit of resource...
When encounters the same problem, the while True in the method called by the thread cannot jump out of the thread ending the while loop outside the while . def startsendfile(self,filelist,taskpath,filetypepath): for k in range(2): -sharp n...
< H2 > the first case < H2 > package com.btmans.thread; public class TestSync implements Runnable{ int b = 100; public synchronized void m1() throws Exception{ b = 1000; Thread.sleep(5000); System.out.println("b=&q...
Hello, everyone. I m learning about mutexes. what I don t understand is that there are two situations in which deadlocks occur: 1, in general, if the same thread calls lock, twice in the second call, because the lock is already occupied, the thread...
when I was testing multithreading, I found that a write module could not correctly respond to ctrl + c under multithreading. After my test, it should be caused by the paste module. How to deal with this situation? import sys import threading import tim...
there are a large number of repetitive results in the running results. I think what is the reason that the novice does not understand very well? ask the great god to let me know? this problem did not occur until it was changed to threading+Queue. un...
when it comes to Thread.join () in the Art of Java concurrent programming, it says that its implementation depends on wait notifyAll s waiting notification mechanism, specifically: when a thread terminates, it calls its own notifyAll method? How can y...
in the book Modern operating system, there is a passage about threading in Chapter 2 because of the high cost of creating or revoking threads in the kernel, some systems adopt an "environmentally friendly " approach to reclaim their threads. When a...
requirements: it s simple to practice using pthread to implement the producer-consumer model create a data_queue.c, for caching data main thread for creating producer and consumer threads question Click the Start button for the first ti...
the child thread interrupted, resets this thread to the interrupted state after catchException. Why is the state obtained in the last line of the code still false? public class TheadStatusTest { public static void main(String[] args) throws Inter...
class t { public: vector<shared_ptr<thread> > t1; public: t() { for (int i = 0; i < 3; iPP) { t1.push_back(make_shared<thread>(&t::Func, this)); (1) } } void Func() ...
suppose that thread 1 executes wait (), thread 2 to acquire lock resources, while thread 3 starts to execute synchronized to compete for lock resources, and thread 2 uses notifyAll () to wake up thread 1 before ending, so which thread 1 or thread 3 can ...
java used user-mode threads before 1.2. why did it change to lightweight processes to implement threads? Aren t user-mode threads more efficient? Although the management and scheduling is a little complicated! ...
is currently getting started learning about FFmpeg. When introducing SDL threads, there are the following problems: 1. Create demux_ thread in main thread 2. demux_thread 3. main 4. Complete code ffplay.c -sharpinclude <stdio.h> -sha...
A multithreading experiment of Java Socket is done on the local machine, server and client are in, the idea is that both server and client want to use multithreading, and socket is reused, and an exception is encountered. describe and its environment: ...
the foreground uses ajax to request the backend. A simple operation, such as submitting the form, calls another ajax request to refresh the list after the form is successfully returned. After receiving the form data, my backend saves the form data into t...
from a thread and process point of view, a process is the smallest unit of resource allocation, and a thread is the smallest unit of independent scheduling. multiple threads in the same process can execute concurrently, sharing process resources. Thre...