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, see <http://www.gnu.org/licenses/>.
18 * Author: Vlad Grecescu <b100dian@gmail.com>
23 #include "gwin32directorymonitor.h"
26 G_DEFINE_TYPE_WITH_CODE (GWin32DirectoryMonitor,
27 g_win32_directory_monitor,
28 G_TYPE_LOCAL_DIRECTORY_MONITOR,
29 g_io_extension_point_implement (G_LOCAL_DIRECTORY_MONITOR_EXTENSION_POINT_NAME,
31 "readdirectorychanges",
34 struct _GWin32DirectoryMonitorPrivate {
35 OVERLAPPED overlapped;
36 DWORD buffer_allocated_bytes;
37 gchar *file_notify_buffer;
38 DWORD buffer_filled_bytes;
40 /* Needed in the APC where we only have this private struct */
44 static void g_win32_directory_monitor_finalize (GObject *base);
45 static gboolean g_win32_directory_monitor_cancel (GFileMonitor *base);
47 static GObject *g_win32_directory_monitor_constructor (GType type,
48 guint n_construct_properties,
49 GObjectConstructParam *construct_properties);
52 g_win32_directory_monitor_is_supported (void)
58 g_win32_directory_monitor_finalize (GObject *base)
60 GWin32DirectoryMonitor *self;
61 self = G_WIN32_DIRECTORY_MONITOR (base);
63 if (self->priv->hDirectory == INVALID_HANDLE_VALUE)
65 /* If we don't have a directory handle we can free
66 * self->priv->file_notify_buffer and self->priv here. The
67 * callback won't be called obviously any more (and presumably
68 * never has been called).
70 g_free (self->priv->file_notify_buffer);
71 self->priv->file_notify_buffer = NULL;
76 /* If we have a directory handle, the OVERLAPPED struct is
77 * passed once more to the callback as a result of the
78 * CloseHandle() done in the cancel method, so self->priv has to
79 * be kept around. The GWin32DirectoryMonitor object is
80 * disappearing, so can't leave a pointer to it in
83 self->priv->self = NULL;
86 if (G_OBJECT_CLASS (g_win32_directory_monitor_parent_class)->finalize)
87 (*G_OBJECT_CLASS (g_win32_directory_monitor_parent_class)->finalize) (base);
91 g_win32_directory_monitor_cancel (GFileMonitor *base)
93 GWin32DirectoryMonitor *self;
94 self = G_WIN32_DIRECTORY_MONITOR (base);
96 /* This triggers a last callback() with nBytes==0. */
98 /* Actually I am not so sure about that, it seems to trigger a last
99 * callback allright, but the way to recognize that it is the final
100 * one is not to check for nBytes==0, I think that was a
103 if (self->priv->hDirectory != INVALID_HANDLE_VALUE)
104 CloseHandle (self->priv->hDirectory);
106 if (G_FILE_MONITOR_CLASS (g_win32_directory_monitor_parent_class)->cancel)
107 (*G_FILE_MONITOR_CLASS (g_win32_directory_monitor_parent_class)->cancel) (base);
112 g_win32_directory_monitor_callback (DWORD error,
114 LPOVERLAPPED lpOverlapped)
117 PFILE_NOTIFY_INFORMATION pfile_notify_walker;
122 GWin32DirectoryMonitorPrivate *priv = (GWin32DirectoryMonitorPrivate *) lpOverlapped;
124 static GFileMonitorEvent events[] =
127 G_FILE_MONITOR_EVENT_CREATED, /* FILE_ACTION_ADDED */
128 G_FILE_MONITOR_EVENT_DELETED, /* FILE_ACTION_REMOVED */
129 G_FILE_MONITOR_EVENT_CHANGED, /* FILE_ACTION_MODIFIED */
130 G_FILE_MONITOR_EVENT_DELETED, /* FILE_ACTION_RENAMED_OLD_NAME */
131 G_FILE_MONITOR_EVENT_CREATED, /* FILE_ACTION_RENAMED_NEW_NAME */
134 /* If priv->self is NULL the GWin32DirectoryMonitor object has been destroyed. */
135 if (priv->self == NULL ||
136 g_file_monitor_is_cancelled (priv->self) ||
137 priv->file_notify_buffer == NULL)
139 g_free (priv->file_notify_buffer);
146 pfile_notify_walker = (PFILE_NOTIFY_INFORMATION)(priv->file_notify_buffer + offset);
147 if (pfile_notify_walker->Action > 0)
149 file_name = g_utf16_to_utf8 (pfile_notify_walker->FileName, pfile_notify_walker->FileNameLength / sizeof(WCHAR), NULL, &file_name_len, NULL);
150 path = g_build_filename(G_LOCAL_DIRECTORY_MONITOR (priv->self)->dirname, file_name, NULL);
151 file = g_file_new_for_path (path);
152 g_file_monitor_emit_event (priv->self, file, NULL, events [pfile_notify_walker->Action]);
153 g_object_unref (file);
157 offset += pfile_notify_walker->NextEntryOffset;
158 } while (pfile_notify_walker->NextEntryOffset);
160 ReadDirectoryChangesW (priv->hDirectory,
161 (gpointer)priv->file_notify_buffer,
162 priv->buffer_allocated_bytes,
164 FILE_NOTIFY_CHANGE_FILE_NAME |
165 FILE_NOTIFY_CHANGE_DIR_NAME |
166 FILE_NOTIFY_CHANGE_ATTRIBUTES |
167 FILE_NOTIFY_CHANGE_SIZE,
168 &priv->buffer_filled_bytes,
170 g_win32_directory_monitor_callback);
174 g_win32_directory_monitor_constructor (GType type,
175 guint n_construct_properties,
176 GObjectConstructParam *construct_properties) {
178 GWin32DirectoryMonitorClass *klass;
179 GObjectClass *parent_class;
180 GWin32DirectoryMonitor *self;
183 klass = G_WIN32_DIRECTORY_MONITOR_CLASS (g_type_class_peek (G_TYPE_WIN32_DIRECTORY_MONITOR));
184 parent_class = G_OBJECT_CLASS (g_type_class_peek_parent (klass));
185 obj = parent_class->constructor (type, n_construct_properties, construct_properties);
186 self = G_WIN32_DIRECTORY_MONITOR (obj);
187 wdirname = g_utf8_to_utf16 (G_LOCAL_DIRECTORY_MONITOR (obj)->dirname, -1, NULL, NULL, NULL);
189 self->priv->hDirectory = CreateFileW (wdirname,
191 FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
195 FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OVERLAPPED,
198 if (self->priv->hDirectory == INVALID_HANDLE_VALUE)
204 ReadDirectoryChangesW (self->priv->hDirectory,
205 (gpointer)self->priv->file_notify_buffer,
206 self->priv->buffer_allocated_bytes,
208 FILE_NOTIFY_CHANGE_FILE_NAME |
209 FILE_NOTIFY_CHANGE_DIR_NAME |
210 FILE_NOTIFY_CHANGE_ATTRIBUTES |
211 FILE_NOTIFY_CHANGE_SIZE,
212 &self->priv->buffer_filled_bytes,
213 &self->priv->overlapped,
214 g_win32_directory_monitor_callback);
221 g_win32_directory_monitor_class_init (GWin32DirectoryMonitorClass *klass)
223 g_win32_directory_monitor_parent_class = g_type_class_peek_parent (klass);
225 G_OBJECT_CLASS (klass)->constructor = g_win32_directory_monitor_constructor;
226 G_OBJECT_CLASS (klass)->finalize = g_win32_directory_monitor_finalize;
227 G_FILE_MONITOR_CLASS (klass)->cancel = g_win32_directory_monitor_cancel;
229 G_LOCAL_DIRECTORY_MONITOR_CLASS (klass)->mount_notify = FALSE;
230 G_LOCAL_DIRECTORY_MONITOR_CLASS (klass)->is_supported = g_win32_directory_monitor_is_supported;
234 g_win32_directory_monitor_init (GWin32DirectoryMonitor *self)
236 self->priv = (GWin32DirectoryMonitorPrivate*)g_new0 (GWin32DirectoryMonitorPrivate, 1);
237 g_assert (self->priv != 0);
239 self->priv->buffer_allocated_bytes = 32768;
240 self->priv->file_notify_buffer = g_new0 (gchar, self->priv->buffer_allocated_bytes);
241 g_assert (self->priv->file_notify_buffer);
243 self->priv->self = G_FILE_MONITOR (self);