如何在Linux上的c中睡眠或暂停PThread

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

void *sleep_thread(void *arg) {
    sleep(5); // 暂停5秒
    printf("Thread %ld has been awakened\n", (long)arg);
    return NULL;
}

int main() {
    pthread_t thread_a, thread_b;
    int arg1 = 1, arg2 = 2;

    pthread_create(&thread_a, NULL, sleep_thread, (void*) arg1);
    pthread_create(&thread_b, NULL, sleep_thread, (void*) arg2);

    pthread_join(thread_a, NULL);
    pthread_join(thread_b, NULL);

    return 0;
}