/******************************************************************************
* FILE: th_hello.c
* DESCRIPTION:
*   A "hello world" Pthreads program.  Demonstrates thread creation and
*   termination.
*
*   To compile and run this program (in Cygwin):
*
*       $ gcc -lphtread th_hello.c
*       $ a.exe
*
* SOURCE: 9/20/98 Blaise Barney
*
* ADAPTED for Operating Systems Class, Fall 2006 (Chee Yap)
*
******************************************************************************/

#include <pthread.h>
#include <stdio.h>
#define NUM_THREADS	5

void *PrintHello(void *threadid)
{
   printf("\n%d: Hello World!\n", threadid);
   pthread_exit(NULL);
}

int main(int argc, char *argv[])
{
   pthread_t threads[NUM_THREADS];
   int rc, t;
   for(t=0;t<NUM_THREADS;t++){
      printf("Creating thread %d\n", t);
      rc = pthread_create(&threads[t], NULL, PrintHello, (void *)t);
      if (rc){
         printf("ERROR; return code from pthread_create() is %d\n", rc);
         exit(-1);
      }
   }
   pthread_exit(NULL);
}