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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <gtk/gtk.h>
#include "../config.h"
#ifdef USE_PTHREADS
#include <pthread.h>
static int nthreads = 0;
static pthread_mutex_t nthreads_mutex = PTHREAD_MUTEX_INITIALIZER;
void
close_cb (GtkWidget *w, gint *flag)
{
*flag = 1;
}
gint
delete_cb (GtkWidget *w, GdkEvent *event, gint *flag)
{
*flag = 1;
return TRUE;
}
void *
counter (void *data)
{
gchar *name = data;
gint flag = 0;
gint counter = 0;
gchar buffer[32];
GtkWidget *window;
GtkWidget *vbox;
GtkWidget *label;
GtkWidget *button;
gdk_threads_enter();
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_title (GTK_WINDOW (window), name);
gtk_widget_set_usize (window, 100, 50);
vbox = gtk_vbox_new (FALSE, 0);
gtk_signal_connect (GTK_OBJECT (window), "delete_event",
GTK_SIGNAL_FUNC (delete_cb), &flag);
gtk_container_add (GTK_CONTAINER (window), vbox);
label = gtk_label_new ("0");
gtk_box_pack_start (GTK_BOX (vbox), label, TRUE, FALSE, 0);
button = gtk_button_new_with_label ("Close");
gtk_signal_connect (GTK_OBJECT (button), "clicked",
GTK_SIGNAL_FUNC (close_cb), &flag);
gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
gtk_widget_show_all (window);
/* Since flag is only checked or set inside the GTK lock,
* we don't have to worry about locking it explicitly
*/
while (!flag)
{
sprintf(buffer, "%d", counter);
gtk_label_set (GTK_LABEL (label), buffer);
gdk_threads_leave();
counter++;
/* Give someone else a chance to get the lock next time.
* Only necessary because we don't do anything else while
* releasing the lock.
*/
sleep(0);
gdk_threads_enter();
}
gtk_widget_destroy (window);
pthread_mutex_lock (&nthreads_mutex);
nthreads--;
if (nthreads == 0)
gtk_main_quit();
pthread_mutex_unlock (&nthreads_mutex);
gdk_threads_leave();
return NULL;
}
#endif
int
main (int argc, char **argv)
{
#ifdef USE_PTHREADS
int i;
if (!gdk_threads_init())
{
fprintf(stderr, "Could not initialize threads\n");
exit(1);
}
gtk_init (&argc, &argv);
pthread_mutex_lock (&nthreads_mutex);
for (i=0; i<5; i++)
{
char buffer[10];
pthread_t thread;
sprintf(buffer, "Thread %i", i);
if (pthread_create (&thread, NULL, counter, buffer))
{
fprintf(stderr, "Couldn't create thread\n");
exit(1);
}
nthreads++;
}
pthread_mutex_unlock (&nthreads_mutex);
gdk_threads_enter();
gtk_main();
gdk_threads_leave();
fprintf(stderr, "Done\n");
#else /* !USE_PTHREADS */
fprintf (stderr, "GTK+ not compiled with threads support\n");
exit (1);
#endif /* USE_PTHREADS */
return 0;
}
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