10 recommended articles about condition variables and threads

This article mainly introduces the producer and consumer operations of Python condition variables. It analyzes the concepts, principles, and related skills of thread operations in the form of specific examples. Friends in need can refer to the examples in this article. Understand the producer and consumer operations of Python condition variables. Share it with everyone for your reference, the details are as follows: Mutex lock is the simplest thread synchronization mechanism. To face complex thread synchronization problems, Python also provides Condition objects. Condition is called a condition variable. In addition to providing acquire and release methods similar to Lock, it also provides wait and notify methods. The thread first acquires a condition variable and then determines some conditions. If the condition is not met, wait; if the condition is met, perform some processing to change the condition, and notify other threads through the notify method. Other threads in the wait state will re-judge the condition after receiving the notification. This process is repeated continuously to solve complex synchronization problems. It can be considered that the Condition object maintains a lock (Lock/RLock) and a wai

1. Code examples of producer and consumer operations of python Condition object

Introduction: This article mainly introduces the producer and consumer operations of Python condition variables, and analyzes Python conditions in the form of specific examples. For the concepts, principles, and related techniques of thread operation, friends in need can refer to

2. Sample code that explains the principle of reentrant lock in Java

Introduction: 1. Overview This article first introduces the Lock interface, the class hierarchy of ReentrantLock and the lock function template class AbstractQueuedSynchronizer The simple principle of ReentrantLock, and then explain the internal principles of ReentrantLock by analyzing the lock method and unlock method of ReentrantLock, and finally make a summary. This article does not cover condition variables in ReentrantLock. 1.1. Lock interface The Lock interface is an abstraction of tools for controlling concurrency. It is better than using the synchronized keyword..

3. Linux--Condition Variable (condition variable) implements the producer-consumer model and read-write lock

Introduction: During the thread synchronization process, there are also the following situations: Thread A needs to wait for a certain condition to be established before it can continue. If the condition is not established, thread A will be blocked, and thread B will wake up thread A to continue execution if the condition is established during execution. Use condition variables in the Pthread library to block waiting for a condition, or to wake up the thread waiting for this condition. Condition variables are represented by variables of type pthread_cond_t.

4. Python multi-threaded programming 5

##Introduction: Mutex lock is the simplest thread synchronization mechanism. The Condition object provided by Python provides support for complex thread synchronization issues. Condition is called a condition variable, except that it provides something similar to Lock...

5. Implementing a thread pool

Introduction:: Implement a thread pool: 1. The three most important synchronization mechanisms of threads 1. Semaphores 2. Mutex locks 3. Condition variables 2. Implement a wrapper class for each of the three synchronization mechanisms #ifdef LOCKER_H #define LOCKER_H#include #include /*Semaphore encapsulation*/ class sem { public:sem(){if( sem_init( &sem_like, 0, 0)){throw std

6. SQL Server uses triggers to update multi-table views

Introduction: Insert data in [ZHONGHE_TAB] 1 USE [SQL- LI] 2 -- Declare three variables to receive [average score], [total score], [Name], and a condition variable that controls the loop @I_WHILE_XUEHAO 3 DECLARE @I_WHILE_XUEHAO INT,@ZONGFEN DECIMAL(4, 1),@AVGFEN DECIMAL(3, 1),@XINGMING NVAR

7. How to dynamically display pictures in Cognos reports

Introduction: Users hope to dynamically display the product's Log in Cognos based on the product. This can be achieved through condition variables in Cognos. Each time Each product value corresponds to an image name. Doing this is more complicated. You must first define multiple variables

8. Python thread detailed explanation

Introduction: this article The article mainly introduces the detailed explanation of Python threads. This article explains in detail all aspects of thread knowledge, such as thread basics, thread status, thread synchronization (lock), thread communication (condition variables), etc. Friends in need can refer to the following

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