gdb/testsuite/gdb.threads/schedlock.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2002, 2003, 2004, 2007, 2008, 2009, 2010, 2011
   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 #include <stdio.h>
  20 #include <unistd.h>
  21 #include <stdlib.h>
  22 #include <pthread.h>
  23
  24 void *thread_function(void *arg); /* Pointer to function executed by each thread */
  25
  26 #define NUM 1
  27
  28 unsigned int args[NUM+1];
  29
  30 int main() {
  31     int res;
  32     pthread_t threads[NUM];
  33     void *thread_result;
  34     long i;
  35
  36     for (i = 1; i <= NUM; i++)
  37       {
  38         args[i] = 1;
  39         res = pthread_create(&threads[i - 1],
  40                              NULL,
  41                              thread_function,
  42                              (void *) i);
  43       }
  44
  45     /* schedlock.exp: last thread start.  */
  46     args[0] = 1;
  47     thread_function ((void *) 0);
  48
  49     exit(EXIT_SUCCESS);
  50 }
  51
  52 void *thread_function(void *arg) {
  53     int my_number =  (long) arg;
  54     int *myp = (int *) &args[my_number];
  55
  56     /* Don't run forever.  Run just short of it :)  */
  57     while (*myp > 0)
  58       {
  59         /* schedlock.exp: main loop.  */
  60         (*myp) ++;
  61       }
  62
  63     pthread_exit(NULL);
  64 }
  65