testthreads.c 3.78 KB
Newer Older
Cody Russell's avatar
Cody Russell committed
1
/* GTK - The GIMP Toolkit
Owen Taylor's avatar
Owen Taylor committed
2 3 4
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * This library is free software; you can redistribute it and/or
5
 * modify it under the terms of the GNU Lesser General Public
Owen Taylor's avatar
Owen Taylor committed
6 7 8 9 10 11
 * 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
12
 * Lesser General Public License for more details.
Owen Taylor's avatar
Owen Taylor committed
13
 *
14
 * You should have received a copy of the GNU Lesser General Public
Owen Taylor's avatar
Owen Taylor committed
15 16 17 18
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
19 20

/*
21
 * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
22 23 24 25 26
 * file for a list of people on the GTK+ Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 
 */

Owen Taylor's avatar
Owen Taylor committed
27
#include <stdio.h>
28
#include <unistd.h>
Owen Taylor's avatar
Owen Taylor committed
29
#include <gtk/gtk.h>
30
#include "config.h"
Owen Taylor's avatar
Owen Taylor committed
31 32

#ifdef USE_PTHREADS
33 34
#include <pthread.h>

Owen Taylor's avatar
Owen Taylor committed
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
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;

64
  gdk_threads_enter();
Owen Taylor's avatar
Owen Taylor committed
65 66 67 68 69 70 71

  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);

72 73
  g_signal_connect (window, "delete-event",
                    G_CALLBACK (delete_cb), &flag);
Owen Taylor's avatar
Owen Taylor committed
74 75 76 77 78 79 80

  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");
81 82
  g_signal_connect (button, "clicked",
                    G_CALLBACK (close_cb), &flag);
Owen Taylor's avatar
Owen Taylor committed
83 84 85 86 87 88 89 90 91 92
  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);
Owen Taylor's avatar
Owen Taylor committed
93
      gtk_label_set_text (GTK_LABEL (label), buffer);
94
      gdk_threads_leave();
Owen Taylor's avatar
Owen Taylor committed
95 96 97 98 99 100 101
      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);
      
102
      gdk_threads_enter();
Owen Taylor's avatar
Owen Taylor committed
103 104 105 106 107 108 109 110 111 112
    }

  gtk_widget_destroy (window);

  pthread_mutex_lock (&nthreads_mutex);
  nthreads--;
  if (nthreads == 0)
    gtk_main_quit();
  pthread_mutex_unlock (&nthreads_mutex);

113
  gdk_threads_leave();
Owen Taylor's avatar
Owen Taylor committed
114 115 116 117 118 119 120 121 122 123 124 125

  return NULL;
}

#endif

int 
main (int argc, char **argv)
{
#ifdef USE_PTHREADS
  int i;

126
  if (!gdk_threads_init())
Owen Taylor's avatar
Owen Taylor committed
127 128 129 130 131 132 133 134 135 136 137
    {
      fprintf(stderr, "Could not initialize threads\n");
      exit(1);
    }

  gtk_init (&argc, &argv);

  pthread_mutex_lock (&nthreads_mutex);

  for (i=0; i<5; i++)
    {
138
      char buffer[5][10];
Owen Taylor's avatar
Owen Taylor committed
139 140
      pthread_t thread;
      
141 142
      sprintf(buffer[i], "Thread %i", i);
      if (pthread_create (&thread, NULL, counter, buffer[i]))
Owen Taylor's avatar
Owen Taylor committed
143 144 145 146 147 148 149 150 151
	{
	  fprintf(stderr, "Couldn't create thread\n");
	  exit(1);
	}
      nthreads++;
    }

  pthread_mutex_unlock (&nthreads_mutex);

152
  gdk_threads_enter();
Owen Taylor's avatar
Owen Taylor committed
153
  gtk_main();
154
  gdk_threads_leave();
Owen Taylor's avatar
Owen Taylor committed
155 156 157 158 159 160 161 162
  fprintf(stderr, "Done\n");
#else /* !USE_PTHREADS */
  fprintf (stderr, "GTK+ not compiled with threads support\n");
  exit (1);
#endif /* USE_PTHREADS */  

  return 0;
}