mirror of
https://gitlab.gnome.org/GNOME/gtk.git
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161 lines
3.7 KiB
C
161 lines
3.7 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <gtk/gtk.h>
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#include "config.h"
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#ifdef USE_PTHREADS
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#include <pthread.h>
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static int nthreads = 0;
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static pthread_mutex_t nthreads_mutex = PTHREAD_MUTEX_INITIALIZER;
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void
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close_cb (GtkWidget *w, gint *flag)
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{
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*flag = 1;
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}
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gint
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delete_cb (GtkWidget *w, GdkEvent *event, gint *flag)
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{
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*flag = 1;
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return TRUE;
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}
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void *
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counter (void *data)
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{
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gchar *name = data;
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gint flag = 0;
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gint counter = 0;
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gchar buffer[32];
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GtkWidget *window;
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GtkWidget *vbox;
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GtkWidget *label;
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GtkWidget *button;
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gdk_threads_enter();
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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gtk_window_set_title (GTK_WINDOW (window), name);
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gtk_widget_set_size_request (window, 100, 50);
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vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, FALSE, 0);
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g_signal_connect (window, "delete-event",
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G_CALLBACK (delete_cb), &flag);
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gtk_container_add (GTK_CONTAINER (window), vbox);
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label = gtk_label_new ("0");
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gtk_box_pack_start (GTK_BOX (vbox), label, TRUE, FALSE, 0);
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button = gtk_button_new_with_label ("Close");
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g_signal_connect (button, "clicked",
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G_CALLBACK (close_cb), &flag);
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gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
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gtk_widget_show_all (window);
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/* Since flag is only checked or set inside the GTK lock,
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* we don't have to worry about locking it explicitly
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*/
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while (!flag)
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{
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sprintf(buffer, "%d", counter);
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gtk_label_set_text (GTK_LABEL (label), buffer);
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gdk_threads_leave();
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counter++;
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/* Give someone else a chance to get the lock next time.
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* Only necessary because we don't do anything else while
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* releasing the lock.
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*/
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sleep(0);
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gdk_threads_enter();
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}
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gtk_widget_destroy (window);
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pthread_mutex_lock (&nthreads_mutex);
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nthreads--;
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if (nthreads == 0)
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gtk_main_quit();
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pthread_mutex_unlock (&nthreads_mutex);
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gdk_threads_leave();
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return NULL;
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}
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#endif
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int
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main (int argc, char **argv)
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{
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#ifdef USE_PTHREADS
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int i;
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if (!gdk_threads_init())
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{
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fprintf(stderr, "Could not initialize threads\n");
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exit(1);
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}
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gtk_init ();
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pthread_mutex_lock (&nthreads_mutex);
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for (i=0; i<5; i++)
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{
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char buffer[5][10];
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pthread_t thread;
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sprintf(buffer[i], "Thread %i", i);
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if (pthread_create (&thread, NULL, counter, buffer[i]))
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{
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fprintf(stderr, "Couldn't create thread\n");
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exit(1);
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}
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nthreads++;
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}
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pthread_mutex_unlock (&nthreads_mutex);
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gdk_threads_enter();
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gtk_main();
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gdk_threads_leave();
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fprintf(stderr, "Done\n");
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#else /* !USE_PTHREADS */
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fprintf (stderr, "GTK+ not compiled with threads support\n");
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exit (1);
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#endif /* USE_PTHREADS */
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return 0;
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}
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