/******************************************************** * An example source module to accompany... * * "Using POSIX Threads: Programming with Pthreads" *     by Brad nichols, Dick Buttlar, Jackie Farrell *     O'Reilly & Associates, Inc. * ******************************************************** * ident.c * * Demonstrate use of pthread_self() and pthread_equal() */#include <stdio.h>#include <pthread.h>pthread_t io_thread;void * io_routine(void *notused){  pthread_t thread;  thread = pthread_self();  if (pthread_equal(io_thread, thread))     printf("hey it is me!\n");  else     printf("thats\' not me!\n");	  return(NULL);}main(void){  extern pthread_t io_thread;  pthread_create(&io_thread,		 NULL,		 io_routine,		 NULL);  pthread_join(io_thread, NULL);}