PThread库的源代码 [关闭]

使用PThread库进行多线程编程

c
#include 
#include 
void* thread_function(void* arg) {
    // 线程执行的代码
    printf("Hello from the thread!%
");
    return NULL;
}
int main() {
    pthread_t my_thread;
    pthread_create(&my_thread, NULL, thread_function, NULL);
    // 等待线程结束
    pthread_join(my_thread, NULL);
    return 0;
}

c
#include 
#include 
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t condition = PTHREAD_COND_INITIALIZER;
int shared_data = 0;
void* producer(void* arg) {
    for (int i = 0; i < 5; ++i) {
        pthread_mutex_lock(&mutex);
        shared_data++;
        printf("Produced: %d%
", shared_data);
        pthread_cond_signal(&condition);
        pthread_mutex_unlock(&mutex);
    }
    return NULL;
}
void* consumer(void* arg) {
    for (int i = 0; i < 5; ++i) {
        pthread_mutex_lock(&mutex);
        while (shared_data == 0) {
            pthread_cond_wait(&condition, &mutex);
        }
        printf("Consumed: %d%
", shared_data);
        shared_data--;
        pthread_mutex_unlock(&mutex);
    }
    return NULL;
}
int main() {
    pthread_t producer_thread, consumer_thread;
    pthread_create(&producer_thread, NULL, producer, NULL);
    pthread_create(&consumer_thread, NULL, consumer, NULL);
    pthread_join(producer_thread, NULL);
    pthread_join(consumer_thread, NULL);
    return 0;
}

c
// pthread_create的简化版本
int pthread_create(pthread_t* thread, const pthread_attr_t* attr, void* (*start_routine)(void*), void* arg) {
    // ... 省略部分代码 ...
    // 创建线程并设置线程属性
    new_thread = create_thread(start_routine, arg, attr);
    // ... 省略部分代码 ...
    return 0;
}
// 互斥锁的实现
int pthread_mutex_lock(pthread_mutex_t* mutex) {
    // ... 省略部分代码 ...
    // 等待互斥锁可用
    while (mutex->locked) {
        // 调用调度器进行线程调度
        schedule();
    }
    // 锁定互斥锁
    mutex->locked = 1;
    // ... 省略部分代码 ...
    return 0;
}