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

   1 /* Manythreads test program.
   2    Copyright 2004
   3    Free Software Foundation, Inc.
   4
   5    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 <stdio.h>
  27 #include <limits.h>
  28
  29 void *
  30 thread_function (void *arg)
  31 {
  32   int x = (int)arg;
  33
  34   printf ("Thread <%d> executing\n", x);
  35
  36   return NULL;
  37 }
  38
  39 int
  40 main (int argc, char **argv)
  41 {
  42   pthread_attr_t attr;
  43   pthread_t threads[256];
  44   int i, j;
  45
  46   pthread_attr_init (&attr);
  47   pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN);
  48
  49   /* Create a ton of quick-executing threads, then wait for them to
  50      complete.  */
  51   for (i = 0; i < 1000; ++i)
  52     {
  53       for (j = 0; j < 256; ++j)
  54         {
  55           pthread_create (&threads[j], &attr, thread_function,
  56                           (void *)(i * 1000 + j));
  57         }
  58
  59       for (j = 0; j < 256; ++j)
  60         {
  61           pthread_join (threads[j], NULL);
  62         }
  63     }
  64
  65   pthread_attr_destroy (&attr);
  66
  67   return 0;
  68 }