linux 多线程参数传递参数

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

// 定义一个结构体来封装参数
typedef struct {
    int thread_id;
    char *message;
} thread_data;

// 线程函数
void *print_message(void *arg) {
    thread_data *data = (thread_data *)arg;
    printf("Thread %d: %s\n", data->thread_id, data->message);
    return NULL;
}

int main() {
    pthread_t threads[NUM_THREADS];
    thread_data thread_args[NUM_THREADS];

    for (int i = 0; i < NUM_THREADS; ++i) {
        thread_args[i].thread_id = i;
        thread_args[i].message = "Hello from thread!";
        pthread_create(&threads[i], NULL, print_message, (void *)&thread_args[i]);
    }

    for (int i = 0; i < NUM_THREADS; ++i) {
        pthread_join(threads[i], NULL);
    }

    return 0;
}

pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
int shared_data = 0;

void *thread_func(void *arg) {
    pthread_mutex_lock(&mutex);
    // 访问或修改共享数据
    shared_data++;
    pthread_mutex_unlock(&mutex);
    return NULL;
}