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/* This testcase is part of GDB, the GNU debugger.
Copyright 2002, 2003, 2004, 2007, 2008, 2009 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
This file is copied from schedlock.c. */
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <pthread.h>
void *thread_function (void *arg); /* Function executed by each thread. */
#define NUM 5
unsigned int args[NUM+1];
int
main ()
{
int res;
pthread_t threads[NUM];
void *thread_result;
long i;
/* To keep the test determinative, initialize args first,
then start all the threads. Otherwise, the way watchthreads.exp
is written, we have to worry about things like threads[0] getting
to 29 hits of args[0] before args[1] gets changed. */
for (i = 0; i < NUM; i++)
{
/* The call to usleep is so that when the watchpoint triggers,
the pc is still on the same line. */
args[i] = 1; usleep (1); /* Init value. */
}
for (i = 0; i < NUM; i++)
{
res = pthread_create (&threads[i],
NULL,
thread_function,
(void *) i);
}
args[i] = 1;
thread_function ((void *) i);
exit (EXIT_SUCCESS);
}
void *
thread_function (void *arg)
{
int my_number = (long) arg;
int *myp = (int *) &args[my_number];
/* Don't run forever. Run just short of it :) */
while (*myp > 0)
{
(*myp) ++; usleep (1); /* Loop increment. */
}
pthread_exit (NULL);
}
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