What is a synchronization mechanism? Summary of usage examples related to synchronization mechanism

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. 10 recommended articles about condition variables and threads

# Introduction: This article mainly introduces the producer and consumer operations of Python condition variables, and analyzes the concept of Python condition variables in the form of specific examples. , principles, and related skills of thread operation, friends who need it can refer to the following examples of this article to describe 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 similar functions to Lock...

2. Detailed explanation of comparative examples of ThreadLocal local threads and synchronization mechanisms in Java

Introduction: This article mainly introduces relevant information on the comparison of ThreadLocal local threads and synchronization mechanisms in Java. Friends who need it You can refer to

3. Notes on using the volatile keyword in Java

##Introduction: The volatile keyword is a slightly weaker synchronization mechanism in Java. Why is it called a weak mechanism. This article mainly introduces the precautions for using the volatile keyword in Java. Friends in need can refer to

4. In-depth analysis of Java memory model: lock

Introduction: Locks are the most important synchronization mechanism in Java concurrent programming. In addition to allowing mutually exclusive execution of critical sections, locks also allow the thread that releases the lock to send messages to the thread that acquires the same lock.

5. The reserved word volatile in java and its difference from synchronized

Introduction: Locks provide two main features: mutual exclusion and visibility. Mutual exclusion allows only one thread to hold a specific lock at a time, so you can use this feature to implement a coordinated access protocol to shared data, so that only one thread can use the shared data at a time. Visibility is more complex, and must ensure that changes made to the shared data before the lock is released are visible to another thread that subsequently acquires the lock - without the visibility guarantee provided by the synchronization mechanism, what the thread sees Shared variables may have previous values ​​or inconsistent values, which can lead to many serious problems.

6. Python multi-threaded programming 5

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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...

7. 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

8. MySQL5.5 master-slave synchronization configuration and issues

Introduction: Install some articles on the Internet to configure the master-slave synchronization mechanism of MySQL, but an exception occurs when restarting the slave MySQL, saying that the parameter master_host /usr/sbin/mysqld is not recognized: unknown variable master_host= 10.0.2.160 It turns out that I am using MySQL5.5, and most of the configurations are based on versions before 5.5. The Mysql version will not work after 5.1.7.

##9. MySQL master-slave library synchronization mechanism

# Introduction: For the synchronization of MySQL master-slave library, we set up a master Library (Master), and a slave library (Slave or Secondary). The slave database copies data content from the master database for disaster backup, read-write separation, etc. This article mainly talks about the synchronization mechanism. As for how to set up the master database, slave database and synchronization of MySQL, there is a lot of content on the Internet. To read it, just Google "MySQL master-slave database settings"

##10.

Use MySQL Proxy to solve MySQL master-slave synchronization delay

##Introduction: MySQL master-slave synchronization mechanism It very conveniently solves the application requirements of high concurrent reading and brings great convenience to Web development. However, this method has a major flaw in that the synchronization mechanism of MySQL relies on the Slave to actively send requests to the Master to obtain data, and due to server load, network congestion, etc., the data between the Master and Slave

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