Linux多线程学习（五）pthread_equal

#define _MULTI_THREADED#include <pthread.h>#include <stdio.h>pthread_t   theThread;

static void checkResults(char *string, int rc) {  if (rc) {    printf("Error on : %s, rc=%d",           string, rc);    exit(EXIT_FAILURE);  }  return;}
void *threadfunc(void *parm){  printf("Inside secondary thread\n");  theThread = pthread_self();  return NULL;}
static void checkResults(char *string, int rc) {  if (rc) {    printf("Error on : %s, rc=%d",           string, rc);    exit(EXIT_FAILURE);  }  return;}
int main(int argc, char **argv){  pthread_t             thread;  int                   rc=0;  printf("Enter Testcase - %s\n", argv[0]);  printf("Create thread using default attributes\n");  rc = pthread_create(&thread, NULL, threadfunc, NULL);  checkResults("pthread_create()\n", rc);  /* sleep() is not a very robust way to wait for the thread */  sleep(5);  printf("Check if global vs local pthread_t are equal\n");  if (!pthread_equal(thread, theThread)) {     printf("Unexpected results on pthread_equal()!\n");     exit(1);  }  printf("pthread_equal returns true\n");  printf("Main completed\n");  return 0;}