examples/C/thread.c

   1 #include <stdio.h>
   2 #include <pthread.h>
   3 #include <stdlib.h>
   4
   5 void *thr_fn1(void *arg)
   6 {
   7         printf("thread 1 returning\n");
   8         return((void *) 1);
   9 }
  10
  11 void *thr_fn2(void *arg)
  12 {
  13         printf("thread 2 exiting\n");
  14         pthread_exit((void *) 2);
  15 }
  16
  17 int main(void)
  18 {
  19         int err;
  20         pthread_t tid1, tid2;
  21         void *tret;
  22
  23         err = pthread_create(&tid1, NULL, thr_fn1, NULL);
  24         if (err != 0) {
  25                 fprintf(stderr, "can't create thread 1: %s\n", strerror(err));
  26                 exit(1);
  27         }
  28
  29         err = pthread_create(&tid2, NULL, thr_fn2, NULL);
  30         if (err != 0) {
  31                 fprintf(stderr, "can't create thread 2: %s\n", strerror(err));
  32                 exit(1);
  33         }
  34
  35         err = pthread_join(tid1, &tret);
  36         if (err != 0) {
  37                 fprintf(stderr, "can't join with thread 1: %s\n",
  38                         strerror(err));
  39                 exit(1);
  40         }
  41         printf("thread 1 exit code: %d\n", (int) tret);
  42
  43         err = pthread_join(tid2, &tret);
  44         if (err != 0) {
  45                 fprintf(stderr, "can't join with thread 2: %s\n",
  46                         strerror(err));
  47                 exit(1);
  48         }
  49         printf("thread 2 exit code: %d\n", (int) tret);
  50
  51         return 0;
  52 }