gdb/testsuite/gdb.threads/schedlock.c

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