1  /* Test of pthread_create () function.
       2     Copyright (C) 2011-2023 Free Software Foundation, Inc.
       3  
       4     This program is free software: you can redistribute it and/or modify
       5     it under the terms of the GNU General Public License as published by
       6     the Free Software Foundation, either version 3 of the License, or
       7     (at your option) any later version.
       8  
       9     This program is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12     GNU General Public License for more details.
      13  
      14     You should have received a copy of the GNU General Public License
      15     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      16  
      17  /* Written by Bruno Haible <bruno@clisp.org>, 2011.  */
      18  
      19  #include <config.h>
      20  
      21  #include <pthread.h>
      22  
      23  #include <stdio.h>
      24  #include <string.h>
      25  
      26  #include "macros.h"
      27  
      28  static pthread_t main_thread_before;
      29  static pthread_t main_thread_after;
      30  static pthread_t worker_thread;
      31  
      32  #define MAGIC ((void *) 1266074729)
      33  static volatile int work_done;
      34  
      35  static void *
      36  worker_thread_func (_GL_UNUSED void *arg)
      37  {
      38    work_done = 1;
      39    return MAGIC;
      40  }
      41  
      42  int
      43  main ()
      44  {
      45    main_thread_before = pthread_self ();
      46  
      47    if (pthread_create (&worker_thread, NULL, worker_thread_func, NULL) == 0)
      48      {
      49        void *ret;
      50  
      51        /* Check that pthread_self () has the same value before than after the
      52           first call to pthread_create ().  */
      53        main_thread_after = pthread_self ();
      54        ASSERT (memcmp (&main_thread_before, &main_thread_after,
      55                        sizeof (pthread_t))
      56                == 0);
      57  
      58        ASSERT (pthread_join (worker_thread, &ret) == 0);
      59  
      60        /* Check the return value of the thread.  */
      61        ASSERT (ret == MAGIC);
      62  
      63        /* Check that worker_thread_func () has finished executing.  */
      64        ASSERT (work_done);
      65  
      66        return 0;
      67      }
      68    else
      69      {
      70        fputs ("pthread_create failed\n", stderr);
      71        return 1;
      72      }
      73  }