gnu/dist/gdb6/gdb/testsuite/gdb.threads/staticthreads.c

   1 /* This test program is part of GDB, The GNU debugger.
   2
   3    Copyright 2004 Free Software Foundation, Inc.
   4
   5    Originally written by Jeff Johnston <jjohnstn@redhat.com>,
   6    contributed by Red Hat
   7
   8    This file is part of GDB.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 59 Temple Place - Suite 330,
  23    Boston, MA 02111-1307, USA.  */
  24
  25 #include <pthread.h>
  26 #include <semaphore.h>
  27 #include <stdio.h>
  28 #include <limits.h>
  29 #include <errno.h>
  30
  31 sem_t semaphore;
  32
  33 void *
  34 thread_function (void *arg)
  35 {
  36   printf ("Thread executing\n");
  37   while (sem_wait (&semaphore) != 0)
  38     {
  39       if (errno != EINTR)
  40         {
  41           perror ("thread_function");
  42           return;
  43         }
  44     }
  45   return NULL;
  46 }
  47
  48 int
  49 main (int argc, char **argv)
  50 {
  51   pthread_attr_t attr;
  52
  53   pthread_attr_init (&attr);
  54   pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN);
  55
  56   if (sem_init (&semaphore, 0, 0) == -1)
  57     {
  58       perror ("semaphore");
  59       return -1;
  60     }
  61
  62
  63   /* Create a thread, wait for it to complete.  */
  64   {
  65     pthread_t thread;
  66     pthread_create (&thread, &attr, thread_function, NULL);
  67     sem_post (&semaphore);
  68     pthread_join (thread, NULL);
  69   }
  70
  71   pthread_attr_destroy (&attr);
  72   return 0;
  73 }