7.3 creating threads

1、 Experimental code

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

void *thread_start (void *arg)
{
    
    int arg_data = *((int *)arg);
    for (int i = 0; i < 10; i++)
    {
    
        for (int j = 0; j < 50000; j++);
        printf ("Receive arg%d = %d\n", arg_data, arg_data);
    }
}
 
int main (void)
{
    
    pthread_t tid;
    int arg1 = 1;
    int arg2 = 2;
    int ret = pthread_create (&tid, NULL, thread_start, (void *)&arg1);
    if (ret)
    {
    
        perror ("pthread_create");
        exit (EXIT_FAILURE);
    }
    thread_start ((void *) &arg2);
    return 0;
}

2、 experimental result