Linux多线程学习（五）pthread_equal

xiaoyeyopulei

于 2012-09-10 15:26:15 发布

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分类专栏： linux多线程文章标签：多线程 linux thread string attributes null

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本文展示了一个简单的多线程编程实例，使用 pthread 库创建并管理线程。通过比较全局与局部 pthread_t 变量来验证线程创建是否成功。

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#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;}