1 /* GIO - GLib Input, Output and Streaming Library
3 * Copyright (C) 2006-2007 Red Hat, Inc.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General
16 * Public License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
18 * Boston, MA 02111-1307, USA.
20 * Author: Vlad Grecescu <b100dian@gmail.com>
24 #define _WIN32_WINNT 0x0400
27 #include "gwin32directorymonitor.h"
28 #include "giomodule.h"
31 G_DEFINE_TYPE_WITH_CODE (GWin32DirectoryMonitor, g_win32_directory_monitor, G_TYPE_LOCAL_DIRECTORY_MONITOR,
32 g_io_extension_point_implement (G_LOCAL_DIRECTORY_MONITOR_EXTENSION_POINT_NAME,
34 "readdirectorychanges",
37 struct _GWin32DirectoryMonitorPrivate {
38 OVERLAPPED overlapped;
39 DWORD buffer_allocated_bytes;
40 gchar* file_notify_buffer;
41 DWORD buffer_filled_bytes;
43 /** needed in the APC where we only have this private struct */
47 static void g_win32_directory_monitor_finalize (GObject* base);
48 static gboolean g_win32_directory_monitor_cancel (GFileMonitor* base);
49 static GObject * g_win32_directory_monitor_constructor (GType type, guint n_construct_properties, GObjectConstructParam * construct_properties);
51 static gboolean g_win32_directory_monitor_is_supported(void) {
55 static void g_win32_directory_monitor_finalize (GObject* base) {
56 GWin32DirectoryMonitor * self;
57 self = G_WIN32_DIRECTORY_MONITOR (base);
59 g_free (self->priv->file_notify_buffer);
62 if (G_OBJECT_CLASS (g_win32_directory_monitor_parent_class)->finalize)
63 (*G_OBJECT_CLASS (g_win32_directory_monitor_parent_class)->finalize) (base);
67 static gboolean g_win32_directory_monitor_cancel (GFileMonitor* base) {
68 GWin32DirectoryMonitor * self;
69 self = G_WIN32_DIRECTORY_MONITOR (base);
71 /* this triggers a last callback() with nBytes=0 */
72 CloseHandle (self->priv->hDirectory);
74 if (G_FILE_MONITOR_CLASS (g_win32_directory_monitor_parent_class)->cancel)
75 (*G_FILE_MONITOR_CLASS (g_win32_directory_monitor_parent_class)->cancel) (base);
79 void CALLBACK g_win32_directory_monitor_callback (DWORD error, DWORD nBytes, GWin32DirectoryMonitorPrivate* lpOverlapped)
82 PFILE_NOTIFY_INFORMATION pfile_notify_walker;
87 static GFileMonitorEvent events[] = {0,
88 G_FILE_MONITOR_EVENT_CREATED, /* FILE_ACTION_ADDED */
89 G_FILE_MONITOR_EVENT_DELETED, /* FILE_ACTION_REMOVED */
90 G_FILE_MONITOR_EVENT_CHANGED, /* FILE_ACTION_MODIFIED */
91 G_FILE_MONITOR_EVENT_DELETED, /* FILE_ACTION_RENAMED_OLD_NAME */
92 G_FILE_MONITOR_EVENT_CREATED, /* FILE_ACTION_RENAMED_NEW_NAME */
95 if (!nBytes) /* monitor was cancelled/finalized */
98 if (g_file_monitor_is_cancelled (G_FILE_MONITOR (lpOverlapped->self)))
99 return; /* and ReadDirectoryChangesW doesn't get called this time */
103 pfile_notify_walker = (PFILE_NOTIFY_INFORMATION)(lpOverlapped->file_notify_buffer + offset);
104 offset += pfile_notify_walker->NextEntryOffset;
105 file_name = g_utf16_to_utf8 (pfile_notify_walker->FileName, pfile_notify_walker->FileNameLength / sizeof(WCHAR), NULL, &file_name_len, NULL);
106 file = g_file_new_for_path (file_name);
107 g_file_monitor_emit_event (lpOverlapped->self, file, NULL, events [pfile_notify_walker->Action]);
108 g_object_unref (file);
110 } while (pfile_notify_walker->NextEntryOffset);
112 ReadDirectoryChangesW (lpOverlapped->hDirectory, (gpointer)lpOverlapped->file_notify_buffer, lpOverlapped->buffer_allocated_bytes, FALSE,
113 FILE_NOTIFY_CHANGE_FILE_NAME | FILE_NOTIFY_CHANGE_DIR_NAME | FILE_NOTIFY_CHANGE_ATTRIBUTES |
114 FILE_NOTIFY_CHANGE_SIZE, &lpOverlapped->buffer_filled_bytes, &lpOverlapped->overlapped, g_win32_directory_monitor_callback);
117 static GObject * g_win32_directory_monitor_constructor (GType type, guint n_construct_properties, GObjectConstructParam * construct_properties) {
119 GWin32DirectoryMonitorClass * klass;
120 GObjectClass * parent_class;
121 GWin32DirectoryMonitor * self;
125 klass = G_WIN32_DIRECTORY_MONITOR_CLASS (g_type_class_peek (G_TYPE_WIN32_DIRECTORY_MONITOR));
126 parent_class = G_OBJECT_CLASS (g_type_class_peek_parent (klass));
127 obj = parent_class->constructor (type, n_construct_properties, construct_properties);
128 self = G_WIN32_DIRECTORY_MONITOR (obj);
129 dirname = G_LOCAL_DIRECTORY_MONITOR (obj)->dirname;
131 self->priv->hDirectory = CreateFile (dirname, FILE_LIST_DIRECTORY, FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
132 NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OVERLAPPED, NULL);
133 g_assert (self->priv->hDirectory != INVALID_HANDLE_VALUE); /* harsh */
135 result = ReadDirectoryChangesW (self->priv->hDirectory, (gpointer)self->priv->file_notify_buffer, self->priv->buffer_allocated_bytes, FALSE,
136 FILE_NOTIFY_CHANGE_FILE_NAME | FILE_NOTIFY_CHANGE_DIR_NAME | FILE_NOTIFY_CHANGE_ATTRIBUTES |
137 FILE_NOTIFY_CHANGE_SIZE, &self->priv->buffer_filled_bytes, &self->priv->overlapped, g_win32_directory_monitor_callback);
138 g_assert (result); /* harsh */
143 static void g_win32_directory_monitor_class_init (GWin32DirectoryMonitorClass * klass) {
145 g_win32_directory_monitor_parent_class = g_type_class_peek_parent (klass);
147 G_OBJECT_CLASS (klass)->constructor = g_win32_directory_monitor_constructor;
148 G_OBJECT_CLASS (klass)->finalize = g_win32_directory_monitor_finalize;
149 G_FILE_MONITOR_CLASS (klass)->cancel = g_win32_directory_monitor_cancel;
151 G_LOCAL_DIRECTORY_MONITOR_CLASS (klass)->mount_notify = FALSE;
152 G_LOCAL_DIRECTORY_MONITOR_CLASS (klass)->is_supported = g_win32_directory_monitor_is_supported;
155 static void g_win32_directory_monitor_init (GWin32DirectoryMonitor * self)
157 self->priv = (GWin32DirectoryMonitorPrivate*)g_new0 (GWin32DirectoryMonitorPrivate, 1);
158 g_assert (self->priv != 0);
160 self->priv->buffer_allocated_bytes = 32768;
161 self->priv->file_notify_buffer = g_new0 (gchar, self->priv->buffer_allocated_bytes);
162 g_assert (self->priv->file_notify_buffer);
164 self->priv->self = G_FILE_MONITOR (self);