/**
 * Very simple example of starting threads
 * Also, a gotch when passing param into the thread
 * 
 * @author gtowell
 * Created: May 2021
 * **/

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


// The function to be executed by all threads
void * myThreadFun(void *vargp)
{
    int *ti = vargp;
    printf("started thread %d\n", *ti);
    sleep(2);
    printf("finishing thread %d\n", *ti);
}
int main(int argc, char const *argv[])
{
    int i;
    int N = atoi(argv[1]);
    // Let us create N threads
    pthread_t threads[N];
    for (i = 0; i < N; i++)
    {
        pthread_create(threads+i, NULL, myThreadFun, &i);
    }
    for (int i = 0; i < N; i++) {
        pthread_join(threads[i], NULL);
        printf("Joined %d\n", i);
    }
    pthread_exit(NULL);
    return 0;
}