锁 中断的书 linux

#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

pthread_mutex_t lock;

void* thread_func(void* arg) {
    pthread_mutex_lock(&lock);
    printf("Thread %ld acquired the lock
", (long)arg);

    // 模拟一些工作
    sleep(1);

    printf("Thread %ld releasing the lock
", (long)arg);
    pthread_mutex_unlock(&lock);
    return NULL;
}

int main() {
    pthread_t threads[5];
    int rc;

    // 初始化互斥锁
    if (pthread_mutex_init(&lock, NULL) != 0) {
        printf("Mutex init failed
");
        return EXIT_FAILURE;
    }

    // 创建线程
    for (long t = 0; t < 5; t++) {
        rc = pthread_create(&threads[t], NULL, thread_func, (void*)t);
        if (rc) {
            printf("Error: unable to create thread %d
", rc);
            exit(-1);
        }
    }

    // 等待线程结束
    for (int i = 0; i < 5; i++) {
        pthread_join(threads[i], NULL);
    }

    // 销毁互斥锁
    pthread_mutex_destroy(&lock);

    return EXIT_SUCCESS;
}