#include <stdio.h>
#include <pthread.h>
#include <unistd.h>
#include <sys/syscall.h>

void * mythread(void* arg)
{
  while(1)
  {
    printf("mythread PID: %d\n", (int)getpid());
    printf("mythread TID: %d\n", (int)syscall(SYS_gettid));
    sleep(5);
  }
}

int main()
{
  pthread_t thread;

  pthread_create(&thread, NULL, &mythread, NULL);

  while(1)
  {
    printf("main     PID: %d\n", (int)getpid());
    printf("main     TID: %d\n", (int)syscall(SYS_gettid));
    sleep(10);
  }

  return 0;
}