gdb/testsuite/gdb.threads/threadapply.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2002, 2003, 2004, 2007, 2008, 2009, 2010
   4    Free Software Foundation, Inc.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18
  19    This file is copied from schedlock.c.  */
  20
  21 #include <stdio.h>
  22 #include <unistd.h>
  23 #include <stdlib.h>
  24 #include <pthread.h>
  25
  26 void *thread_function(void *arg); /* Pointer to function executed by each thread */
  27
  28 #define NUM 5
  29
  30 unsigned int args[NUM+1];
  31
  32 int main() {
  33     int res;
  34     int all_started;
  35     pthread_t threads[NUM];
  36     void *thread_result;
  37     long i;
  38
  39     for (i = 0; i < NUM; i++)
  40       {
  41         args[i] = 1; /* Init value.  */
  42         res = pthread_create(&threads[i],
  43                              NULL,
  44                              thread_function,
  45                              (void *) i);
  46       }
  47
  48     all_started = 0;
  49     while (!all_started)
  50       {
  51         all_started = 1;
  52         for (i = 0; i < NUM; i++)
  53           {
  54             if (args[i] == 1)
  55               {
  56                 all_started = 0;
  57                 break;
  58               }
  59           }
  60       }
  61
  62     args[i] = 1;
  63     /* Break here */
  64     thread_function ((void *) i);
  65
  66     exit(EXIT_SUCCESS);
  67 }
  68
  69 void *thread_function(void *arg) {
  70     int my_number =  (long) arg;
  71     int *myp = (int *) &args[my_number];
  72
  73     /* Don't run forever.  Run just short of it :)  */
  74     while (*myp > 0)
  75       {
  76         (*myp) ++;  /* Loop increment.  */
  77       }
  78
  79     pthread_exit(NULL);
  80 }
  81