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preface This article discusses the AQS interface provided in JDK and one of its implementation classes, ReentrantLock. The article is based on the book "the art of Java Concurrent Programming" and the video of dark horse Dark horse multithreading Take notes. 1. AQS 1. Concept Overview: the full name is AbstractQueuedSynch ...

Original website: brief introduction explain This article introduces the usage of blocking queue in Java with examples. Queue type There are several types of BlockingQueue: ArrayBlockingQueue, LinkedBlockingQueue, synchroousqueue, PriorityBlockingQueue, DelayedWorkQueue. Queue typeexplainArrayBlockingQueue FIFO queue based on array; Bound ...

The previous section talked about the simple communication between the server and client of java socket, and learned about the communication mechanism of socket. See the following for details: java socket for communication programming Today, let's go further. There is a problem in the previous example, that is, sending messages only once ends. ...

RT-Thread version: 4.0.5 MCU model: STM32F103RCT6 (ARM Cortex-M3 kernel) 1 Synchronization and Mutual Exclusion First add a few concepts: Execution Unit: Determined by the current hardware platform and the operating system it runs. For RT-Thread and STM32, the execution units are threads and interruptsCritical Zone: Multiple execut ...

Create and end threads pthread_create #include <pthread.h> /* Create a new thread, starting with execution of START-ROUTINE getting passed ARG. Creation attributed come from ATTR. The new handle is stored in *NEWTHREAD. */ extern int pthread_create (pthread_t *__restrict __newthread, const pthread_attr_t *__restrict __at ...

Chapter 3 - management of shared model (4) Thread state Re understand thread state transition (key) Suppose there is a thread Thread t Case 1 new -- > runnable When the t.start() method is called, new -- > runable Case 2 runnable < – > waiting After the t thread obtains the object lock with synchronized(obj)C ...

Threads and processes Process It is a running activity of the program in the computer on a certain data set. It is the basic unit of resource allocation and scheduling of the system and the basis of the structure of the operating system. (process understanding: an independent area on the operating system. Each process runs independently ...

Asynchronous framework Why use asynchronous framework? Solve what problem? In the development of spring boot, it is generally called synchronously. However, there are often special businesses that need to be processed asynchronously. For example: register a new user, send 100 points, or place a successful order, send a push message, etc. ...

Shangsi Valley JUC source code teaching practical tutorial complete version (java juc thread intensive lecture) 1.volatile keyword and memory visibility When the program runs, the JVM will allocate an independent cache for each thread executing tasks to improve efficiency. The memory visibility problem is that when multiple threads operate t ...

Thread life cycle Source code proof Calling thread getState method: Thread.currentThread().getState(); public State getState() { // get current thread state return sun.misc.VM.toThreadState(threadStatus); } public static State toThreadState(int var0) { if ((var0 & 4) != 0) { r ...