gio/inotify/ginotifyfilemonitor.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 2.1 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, see <http://www.gnu.org/licenses/>.
  18  *
  19  * Authors: Alexander Larsson <alexl@redhat.com>
  20  *          John McCutchan <john@johnmccutchan.com>
  21  *          Sebastian Dröge <slomo@circular-chaos.org>
  22  *          Ryan Lortie <desrt@desrt.ca>
  23  */
  24
  25 #include "config.h"
  26
  27 #include "ginotifyfilemonitor.h"
  28 #include <gio/giomodule.h>
  29
  30 #define USE_INOTIFY 1
  31 #include "inotify-helper.h"
  32
  33 struct _GInotifyFileMonitor
  34 {
  35   GLocalFileMonitor parent_instance;
  36
  37   inotify_sub *sub;
  38 };
  39
  40 G_DEFINE_TYPE_WITH_CODE (GInotifyFileMonitor, g_inotify_file_monitor, G_TYPE_LOCAL_FILE_MONITOR,
  41                          g_io_extension_point_implement (G_LOCAL_FILE_MONITOR_EXTENSION_POINT_NAME,
  42                                                          g_define_type_id, "inotify", 20))
  43
  44 static gboolean
  45 g_inotify_file_monitor_is_supported (void)
  46 {
  47   return _ih_startup ();
  48 }
  49
  50 static void
  51 g_inotify_file_monitor_start (GLocalFileMonitor  *local_monitor,
  52                               const gchar        *dirname,
  53                               const gchar        *basename,
  54                               const gchar        *filename,
  55                               GFileMonitorSource *source)
  56 {
  57   GInotifyFileMonitor *inotify_monitor = G_INOTIFY_FILE_MONITOR (local_monitor);
  58   gboolean success;
  59
  60   /* should already have been called, from is_supported() */
  61   success = _ih_startup ();
  62   g_assert (success);
  63
  64   inotify_monitor->sub = _ih_sub_new (dirname, basename, filename, source);
  65   _ih_sub_add (inotify_monitor->sub);
  66 }
  67
  68 static gboolean
  69 g_inotify_file_monitor_cancel (GFileMonitor *monitor)
  70 {
  71   GInotifyFileMonitor *inotify_monitor = G_INOTIFY_FILE_MONITOR (monitor);
  72
  73   if (inotify_monitor->sub)
  74     {
  75       _ih_sub_cancel (inotify_monitor->sub);
  76       _ih_sub_free (inotify_monitor->sub);
  77       inotify_monitor->sub = NULL;
  78     }
  79
  80   return TRUE;
  81 }
  82
  83 static void
  84 g_inotify_file_monitor_finalize (GObject *object)
  85 {
  86   GInotifyFileMonitor *inotify_monitor = G_INOTIFY_FILE_MONITOR (object);
  87
  88   /* must surely have been cancelled already */
  89   g_assert (!inotify_monitor->sub);
  90
  91   G_OBJECT_CLASS (g_inotify_file_monitor_parent_class)->finalize (object);
  92 }
  93
  94 static void
  95 g_inotify_file_monitor_init (GInotifyFileMonitor* monitor)
  96 {
  97 }
  98
  99 static void
 100 g_inotify_file_monitor_class_init (GInotifyFileMonitorClass* klass)
 101 {
 102   GObjectClass* gobject_class = G_OBJECT_CLASS (klass);
 103   GFileMonitorClass *file_monitor_class = G_FILE_MONITOR_CLASS (klass);
 104   GLocalFileMonitorClass *local_file_monitor_class = G_LOCAL_FILE_MONITOR_CLASS (klass);
 105
 106   local_file_monitor_class->is_supported = g_inotify_file_monitor_is_supported;
 107   local_file_monitor_class->start = g_inotify_file_monitor_start;
 108   local_file_monitor_class->mount_notify = TRUE;
 109   file_monitor_class->cancel = g_inotify_file_monitor_cancel;
 110
 111   gobject_class->finalize = g_inotify_file_monitor_finalize;
 112 }