summaryrefslogtreecommitdiff
path: root/gtk/testthreads.c
blob: c10cbecdaed5a4368399382fad39068183c0bc59 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
/* 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.
 */

/*
 * Modified by the GTK+ Team and others 1997-1999.  See the AUTHORS
 * 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/. 
 */

#include <stdio.h>
#include <unistd.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_text (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[5][10];
      pthread_t thread;
      
      sprintf(buffer[i], "Thread %i", i);
      if (pthread_create (&thread, NULL, counter, buffer[i]))
	{
	  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;
}