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      1 /* GIO - GLib Input, Output and Streaming Library
      2  *
      3  * Copyright (C) 2006-2007 Red Hat, Inc.
      4  * Copyright (C) 2007 Sebastian Drge.
      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 (at) redhat.com>
     22  *          John McCutchan <john (at) johnmccutchan.com>
     23  *          Sebastian Drge <slomo (at) circular-chaos.org>
     24  */
     25 
     26 #include "config.h"
     27 
     28 #include "gfamfilemonitor.h"
     29 #include "giomodule.h"
     30 
     31 #include "fam-helper.h"
     32 
     33 struct _GFamFileMonitor
     34 {
     35   GLocalFileMonitor parent_instance;
     36   fam_sub *sub;
     37 };
     38 
     39 static gboolean g_fam_file_monitor_cancel (GFileMonitor* monitor);
     40 
     41 G_DEFINE_DYNAMIC_TYPE (GFamFileMonitor, g_fam_file_monitor, G_TYPE_LOCAL_FILE_MONITOR)
     42 
     43 static void
     44 g_fam_file_monitor_finalize (GObject *object)
     45 {
     46   GFamFileMonitor *fam_monitor = G_FAM_FILE_MONITOR (object);
     47   fam_sub *sub = fam_monitor->sub;
     48 
     49   if (sub) {
     50     if (!_fam_sub_cancel (sub))
     51       g_warning ("Unexpected error cancelling fam monitor");
     52     fam_monitor->sub = NULL;
     53   }
     54 
     55   if (G_OBJECT_CLASS (g_fam_file_monitor_parent_class)->finalize)
     56     (*G_OBJECT_CLASS (g_fam_file_monitor_parent_class)->finalize) (object);
     57 }
     58 
     59 static GObject *
     60 g_fam_file_monitor_constructor (GType type,
     61                                 guint n_construct_properties,
     62                                 GObjectConstructParam *construct_properties)
     63 {
     64   GObject *obj;
     65   GFamFileMonitorClass *klass;
     66   GObjectClass *parent_class;
     67   GFamFileMonitor *fam_monitor;
     68   const gchar *filename = NULL;
     69   fam_sub *sub = NULL;
     70 
     71   klass = G_FAM_FILE_MONITOR_CLASS (g_type_class_peek (G_TYPE_FAM_FILE_MONITOR));
     72   parent_class = G_OBJECT_CLASS (g_type_class_peek_parent (klass));
     73   obj = parent_class->constructor (type,
     74                                    n_construct_properties,
     75                                    construct_properties);
     76 
     77   fam_monitor = G_FAM_FILE_MONITOR (obj);
     78 
     79   filename = G_LOCAL_FILE_MONITOR (obj)->filename;
     80 
     81   g_assert (filename != NULL);
     82 
     83   sub = _fam_sub_add (filename, FALSE, fam_monitor);
     84   /* FIXME: what to do about errors here? we can't return NULL or another
     85    * kind of error and an assertion is probably too hard */
     86   g_assert (sub != NULL);
     87 
     88   fam_monitor->sub = sub;
     89 
     90   return obj;
     91 }
     92 
     93 static void
     94 g_fam_file_monitor_class_finalize (GFamFileMonitorClass *klass)
     95 {
     96 }
     97 
     98 static gboolean
     99 g_fam_file_monitor_is_supported (void)
    100 {
    101   return _fam_sub_startup ();
    102 }
    103 
    104 static void
    105 g_fam_file_monitor_class_init (GFamFileMonitorClass* klass)
    106 {
    107   GObjectClass* gobject_class = G_OBJECT_CLASS (klass);
    108   GFileMonitorClass *file_monitor_class = G_FILE_MONITOR_CLASS (klass);
    109   GLocalFileMonitorClass *local_file_monitor_class = G_LOCAL_FILE_MONITOR_CLASS (klass);
    110 
    111   gobject_class->finalize = g_fam_file_monitor_finalize;
    112   gobject_class->constructor = g_fam_file_monitor_constructor;
    113   file_monitor_class->cancel = g_fam_file_monitor_cancel;
    114 
    115   local_file_monitor_class->is_supported = g_fam_file_monitor_is_supported;
    116 }
    117 
    118 static void
    119 g_fam_file_monitor_init (GFamFileMonitor* monitor)
    120 {
    121 
    122 }
    123 
    124 static gboolean
    125 g_fam_file_monitor_cancel (GFileMonitor* monitor)
    126 {
    127   GFamFileMonitor *fam_monitor = G_FAM_FILE_MONITOR (monitor);
    128   fam_sub *sub = fam_monitor->sub;
    129 
    130   if (sub) {
    131     if (!_fam_sub_cancel (sub))
    132       g_warning ("Unexpected error cancelling fam monitor");
    133     fam_monitor->sub = NULL;
    134   }
    135 
    136   if (G_FILE_MONITOR_CLASS (g_fam_file_monitor_parent_class)->cancel)
    137     (*G_FILE_MONITOR_CLASS (g_fam_file_monitor_parent_class)->cancel) (monitor);
    138 
    139   return TRUE;
    140 }
    141 
    142 void
    143 g_fam_file_monitor_register (GIOModule *module)
    144 {
    145   g_fam_file_monitor_register_type (G_TYPE_MODULE (module));
    146   g_io_extension_point_implement (G_LOCAL_FILE_MONITOR_EXTENSION_POINT_NAME,
    147 				  G_TYPE_FAM_FILE_MONITOR,
    148 				  "fam",
    149 				  10);
    150 }
    151 
    152