gio/inotify/ginotifydirectorymonitor.c

   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 "ginotifydirectorymonitor.h"
  29 #include "giomodule.h"
  30
  31 #define USE_INOTIFY 1
  32 #include "inotify-helper.h"
  33
  34 #include "gioalias.h"
  35
  36 struct _GInotifyDirectoryMonitor
  37 {
  38   GLocalDirectoryMonitor parent_instance;
  39   inotify_sub *sub;
  40 };
  41
  42 static gboolean g_inotify_directory_monitor_cancel (GFileMonitor* monitor);
  43
  44 #define g_inotify_directory_monitor_get_type _g_inotify_directory_monitor_get_type
  45 G_DEFINE_TYPE_WITH_CODE (GInotifyDirectoryMonitor, g_inotify_directory_monitor, G_TYPE_LOCAL_DIRECTORY_MONITOR,
  46                          g_io_extension_point_implement (G_LOCAL_DIRECTORY_MONITOR_EXTENSION_POINT_NAME,
  47                                                          g_define_type_id,
  48                                                          "inotify",
  49                                                          20))
  50
  51 static void
  52 g_inotify_directory_monitor_finalize (GObject *object)
  53 {
  54   GInotifyDirectoryMonitor *inotify_monitor = G_INOTIFY_DIRECTORY_MONITOR (object);
  55   inotify_sub *sub = inotify_monitor->sub;
  56
  57   if (sub)
  58     {
  59       _ih_sub_cancel (sub);
  60       _ih_sub_free (sub);
  61       inotify_monitor->sub = NULL;
  62     }
  63
  64   if (G_OBJECT_CLASS (g_inotify_directory_monitor_parent_class)->finalize)
  65     (*G_OBJECT_CLASS (g_inotify_directory_monitor_parent_class)->finalize) (object);
  66 }
  67
  68 static GObject *
  69 g_inotify_directory_monitor_constructor (GType type,
  70                                          guint n_construct_properties,
  71                                          GObjectConstructParam *construct_properties)
  72 {
  73   GObject *obj;
  74   GInotifyDirectoryMonitorClass *klass;
  75   GObjectClass *parent_class;
  76   GInotifyDirectoryMonitor *inotify_monitor;
  77   const gchar *dirname = NULL;
  78   inotify_sub *sub = NULL;
  79
  80   klass = G_INOTIFY_DIRECTORY_MONITOR_CLASS (g_type_class_peek (G_TYPE_INOTIFY_DIRECTORY_MONITOR));
  81   parent_class = G_OBJECT_CLASS (g_type_class_peek_parent (klass));
  82   obj = parent_class->constructor (type,
  83                                    n_construct_properties,
  84                                    construct_properties);
  85
  86   inotify_monitor = G_INOTIFY_DIRECTORY_MONITOR (obj);
  87
  88   dirname = G_LOCAL_DIRECTORY_MONITOR (obj)->dirname;
  89   g_assert (dirname != NULL);
  90
  91   /* Will never fail as is_supported() should be called before instanciating
  92    * anyway */
  93   g_assert (_ih_startup ());
  94
  95   sub = _ih_sub_new (dirname, NULL, inotify_monitor);
  96   /* FIXME: what to do about errors here? we can't return NULL or another
  97    * kind of error and an assertion is probably too hard */
  98   g_assert (sub != NULL);
  99   g_assert (_ih_sub_add (sub));
 100
 101   inotify_monitor->sub = sub;
 102
 103   return obj;
 104 }
 105
 106 static gboolean
 107 g_inotify_directory_monitor_is_supported (void)
 108 {
 109   return _ih_startup ();
 110 }
 111
 112 static void
 113 g_inotify_directory_monitor_class_init (GInotifyDirectoryMonitorClass* klass)
 114 {
 115   GObjectClass* gobject_class = G_OBJECT_CLASS (klass);
 116   GFileMonitorClass *directory_monitor_class = G_FILE_MONITOR_CLASS (klass);
 117   GLocalDirectoryMonitorClass *local_directory_monitor_class = G_LOCAL_DIRECTORY_MONITOR_CLASS (klass);
 118
 119   gobject_class->finalize = g_inotify_directory_monitor_finalize;
 120   gobject_class->constructor = g_inotify_directory_monitor_constructor;
 121   directory_monitor_class->cancel = g_inotify_directory_monitor_cancel;
 122
 123   local_directory_monitor_class->mount_notify = TRUE;
 124   local_directory_monitor_class->is_supported = g_inotify_directory_monitor_is_supported;
 125 }
 126
 127 static void
 128 g_inotify_directory_monitor_init (GInotifyDirectoryMonitor* monitor)
 129 {
 130 }
 131
 132 static gboolean
 133 g_inotify_directory_monitor_cancel (GFileMonitor* monitor)
 134 {
 135   GInotifyDirectoryMonitor *inotify_monitor = G_INOTIFY_DIRECTORY_MONITOR (monitor);
 136   inotify_sub *sub = inotify_monitor->sub;
 137
 138   if (sub)
 139     {
 140       _ih_sub_cancel (sub);
 141       _ih_sub_free (sub);
 142       inotify_monitor->sub = NULL;
 143     }
 144
 145   if (G_FILE_MONITOR_CLASS (g_inotify_directory_monitor_parent_class)->cancel)
 146     (*G_FILE_MONITOR_CLASS (g_inotify_directory_monitor_parent_class)->cancel) (monitor);
 147
 148   return TRUE;
 149 }
 150