Shulou(Shulou.com)06/02 Report--

This article mainly introduces the methods of thread synchronization, which has a certain reference value, friends who need can refer to it. I hope you will learn a lot after reading this article. Next, let the editor take you to learn about it.

What are the methods of thread synchronization? Under linux, the system provides many ways to achieve thread synchronization, of which the most commonly used are mutexes, condition variables and semaphores. There may be many partners who are not familiar with these three methods.

There are three ways to realize thread synchronization under Linux:

1. Mutex (mutex)

The synchronization between threads is realized through the lock mechanism.

1. Initialize the lock. Under Linux, the mutex data type of a thread is pthread_mutex_t. Initialize it before using it.

Static allocation: pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER

Dynamic allocation: int pthread_mutex_init (pthread_mutex_t * mutex, const pthread_mutex_attr_t * mutexattr)

2. Add the lock. When accessing a shared resource, the mutex is locked. If the mutex is already locked, the calling thread blocks until the mutex is unlocked.

Int pthread_mutex_lock (pthread_mutex * mutex)

Int pthread_mutex_trylock (pthread_mutex_t * mutex)

3. Unlock. After completing the access to the shared resource, unlock the mutex.

Int pthread_mutex_unlock (pthread_mutex_t * mutex)

4. Destroy the lock. After the lock is used, it needs to be destroyed to release resources.

Int pthread_mutex_destroy (pthread_mutex * mutex)

# include # include "iostream" using namespace std;pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;int tmp;void* thread (void* arg) {cout

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.