1/* GIO - GLib Input, Output and Streaming Library
2 *
3 * Copyright (C) 2006-2007 Red Hat, Inc.
4 * Copyright (C) 2007 Sebastian Dröge.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General
17 * Public License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
19 * Boston, MA 02111-1307, USA.
20 *
21 * Authors: Alexander Larsson <alexl@redhat.com>
22 *          John McCutchan <john@johnmccutchan.com>
23 *          Sebastian Dröge <slomo@circular-chaos.org>
24 */
25
26#include "config.h"
27
28#include "ginotifyfilemonitor.h"
29#include <gio/giomodule.h>
30
31#define USE_INOTIFY 1
32#include "inotify-helper.h"
33
34#include "gioalias.h"
35
36struct _GInotifyFileMonitor
37{
38  GLocalFileMonitor parent_instance;
39  gchar *filename;
40  gchar *dirname;
41  inotify_sub *sub;
42};
43
44static gboolean g_inotify_file_monitor_cancel (GFileMonitor* monitor);
45
46#define g_inotify_file_monitor_get_type _g_inotify_file_monitor_get_type
47G_DEFINE_TYPE_WITH_CODE (GInotifyFileMonitor, g_inotify_file_monitor, G_TYPE_LOCAL_FILE_MONITOR,
48			 g_io_extension_point_implement (G_LOCAL_FILE_MONITOR_EXTENSION_POINT_NAME,
49							 g_define_type_id,
50							 "inotify",
51							 20))
52
53static void
54g_inotify_file_monitor_finalize (GObject *object)
55{
56  GInotifyFileMonitor *inotify_monitor = G_INOTIFY_FILE_MONITOR (object);
57  inotify_sub *sub = inotify_monitor->sub;
58
59  if (sub)
60    {
61      _ih_sub_cancel (sub);
62      _ih_sub_free (sub);
63      inotify_monitor->sub = NULL;
64    }
65
66  if (inotify_monitor->filename)
67    {
68      g_free (inotify_monitor->filename);
69      inotify_monitor->filename = NULL;
70    }
71
72  if (inotify_monitor->dirname)
73    {
74      g_free (inotify_monitor->dirname);
75      inotify_monitor->dirname = NULL;
76    }
77
78  if (G_OBJECT_CLASS (g_inotify_file_monitor_parent_class)->finalize)
79    (*G_OBJECT_CLASS (g_inotify_file_monitor_parent_class)->finalize) (object);
80}
81
82static GObject *
83g_inotify_file_monitor_constructor (GType                  type,
84                                    guint                  n_construct_properties,
85                                    GObjectConstructParam *construct_properties)
86{
87  GObject *obj;
88  GInotifyFileMonitorClass *klass;
89  GObjectClass *parent_class;
90  GInotifyFileMonitor *inotify_monitor;
91  const gchar *filename = NULL;
92  inotify_sub *sub = NULL;
93
94  klass = G_INOTIFY_FILE_MONITOR_CLASS (g_type_class_peek (G_TYPE_INOTIFY_FILE_MONITOR));
95  parent_class = G_OBJECT_CLASS (g_type_class_peek_parent (klass));
96  obj = parent_class->constructor (type,
97                                   n_construct_properties,
98                                   construct_properties);
99
100  inotify_monitor = G_INOTIFY_FILE_MONITOR (obj);
101
102  filename = G_LOCAL_FILE_MONITOR (obj)->filename;
103
104  g_assert (filename != NULL);
105
106  inotify_monitor->filename = g_path_get_basename (filename);
107  inotify_monitor->dirname = g_path_get_dirname (filename);
108
109  /* Will never fail as is_supported() should be called before instanciating
110   * anyway */
111  g_assert (_ih_startup ());
112
113  sub = _ih_sub_new (inotify_monitor->dirname, inotify_monitor->filename, inotify_monitor);
114
115  /* FIXME: what to do about errors here? we can't return NULL or another
116   * kind of error and an assertion is probably too hard */
117  g_assert (sub != NULL);
118  g_assert (_ih_sub_add (sub));
119
120  inotify_monitor->sub = sub;
121
122  return obj;
123}
124
125static gboolean
126g_inotify_file_monitor_is_supported (void)
127{
128  return _ih_startup ();
129}
130
131static void
132g_inotify_file_monitor_class_init (GInotifyFileMonitorClass* klass)
133{
134  GObjectClass* gobject_class = G_OBJECT_CLASS (klass);
135  GFileMonitorClass *file_monitor_class = G_FILE_MONITOR_CLASS (klass);
136  GLocalFileMonitorClass *local_file_monitor_class = G_LOCAL_FILE_MONITOR_CLASS (klass);
137
138  gobject_class->finalize = g_inotify_file_monitor_finalize;
139  gobject_class->constructor = g_inotify_file_monitor_constructor;
140  file_monitor_class->cancel = g_inotify_file_monitor_cancel;
141
142  local_file_monitor_class->is_supported = g_inotify_file_monitor_is_supported;
143}
144
145static void
146g_inotify_file_monitor_init (GInotifyFileMonitor* monitor)
147{
148}
149
150static gboolean
151g_inotify_file_monitor_cancel (GFileMonitor* monitor)
152{
153  GInotifyFileMonitor *inotify_monitor = G_INOTIFY_FILE_MONITOR (monitor);
154  inotify_sub *sub = inotify_monitor->sub;
155
156  if (sub)
157    {
158      _ih_sub_cancel (sub);
159      _ih_sub_free (sub);
160      inotify_monitor->sub = NULL;
161    }
162
163  if (G_FILE_MONITOR_CLASS (g_inotify_file_monitor_parent_class)->cancel)
164    (*G_FILE_MONITOR_CLASS (g_inotify_file_monitor_parent_class)->cancel) (monitor);
165
166  return TRUE;
167}
168
169