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

void *print_message_function( void *ptr );

main()

{

     pthread_t thread1, thread2;

     const char *message1 = "Thread 1";

     const char *message2 = "Thread 2";

     int  iret1, iret2;

 

    /* Create independent threads each of which will execute function */

 

     iret1 = pthread_create( &thread1, NULL, print_message_function, (void*) message1);

     if(iret1)

     {

         fprintf(stderr,"Error - pthread_create() return code: %d\n",iret1);

         exit(EXIT_FAILURE);

     }

 

     iret2 = pthread_create( &thread2, NULL, print_message_function, (void*) message2);

     if(iret2)

     {

         fprintf(stderr,"Error - pthread_create() return code: %d\n",iret2);

         exit(EXIT_FAILURE);

     }

 

     printf("pthread_create() for thread 1 returns: %d\n",iret1);

     printf("pthread_create() for thread 2 returns: %d\n",iret2);


     /* Wait till threads are complete before main continues. Unless we  */

     /* wait we run the risk of executing an exit which will terminate   */

     /* the process and all threads before the threads have completed.   */
 

     pthread_join( thread1, NULL);

     pthread_join( thread2, NULL);

     exit(EXIT_SUCCESS);

}

 

void *print_message_function( void *ptr )

{

     char *message;

     message = (char *) ptr;

     printf("%s \n", message);

}
