tests/test-pthread-thread.c

   1 /* Test of pthread_create () function.
   2    Copyright (C) 2011-2024 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 test_exit_status;
  67     }
  68   else
  69     {
  70       fputs ("pthread_create failed\n", stderr);
  71       return 1;
  72     }
  73 }