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

/* POZOR - pri kompilacii treba prilinkovat kniznicu libpthread prepinacom -lpthread */

/* Parameters to print_function. */

struct char_print_parms
{
/* The character to print. */
  char character;
/* The number of times to print it. */
  int count;
};

/* Prints a number of characters to stderr, as given by PARAMETERS,
which is a pointer to a struct char_print_parms. */

void * char_print (void *parameters) {
/* Cast the cookie pointer to the right type. */
  struct char_print_parms *p = (struct char_print_parms *) parameters;
  int i;

  for (i = 0; i < p->count; ++i)
    fputc (p->character, stderr);
  return NULL;
}

/* The main program. */

int main (int argc, char *argv[]) {
  pthread_t thread1_id;
  pthread_t thread2_id;
  struct char_print_parms thread1_args;
  struct char_print_parms thread2_args;

/* Create a new thread to print 30000 x's. */
  thread1_args.character = 'x';
  thread1_args.count = 30000;
  pthread_create (&thread1_id, NULL, &char_print, &thread1_args);

/* Create a new thread to print 20000 o's. */
  thread2_args.character = 'o';
  thread2_args.count = 20000;
  pthread_create (&thread2_id, NULL, &char_print, &thread2_args);

/* Make sure the first thread has finished. */
  pthread_join (thread1_id, NULL);
/* Make sure the second thread has finished. */
  pthread_join (thread2_id, NULL);

/* Now we can safely return. */
  return 0;
}