1 /* GIO - GLib Input, Output and Streaming Library 2 * 3 * Copyright (C) 2006-2007 Red Hat, Inc. 4 * 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. 9 * 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. 14 * 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. 19 * 20 * Author: Vlad Grecescu <b100dian (at) gmail.com> 21 * 22 */ 23 24 #define _WIN32_WINNT 0x0400 25 26 #include "config.h" 27 #include "gwin32directorymonitor.h" 28 #include "giomodule.h" 29 #include <windows.h> 30 31 G_DEFINE_TYPE_WITH_CODE (GWin32DirectoryMonitor, 32 g_win32_directory_monitor, 33 G_TYPE_LOCAL_DIRECTORY_MONITOR, 34 g_io_extension_point_implement (G_LOCAL_DIRECTORY_MONITOR_EXTENSION_POINT_NAME, 35 g_define_type_id, 36 "readdirectorychanges", 37 20)) 38 39 struct _GWin32DirectoryMonitorPrivate { 40 OVERLAPPED overlapped; 41 DWORD buffer_allocated_bytes; 42 gchar *file_notify_buffer; 43 DWORD buffer_filled_bytes; 44 HANDLE hDirectory; 45 /* Needed in the APC where we only have this private struct */ 46 GFileMonitor *self; 47 }; 48 49 static void g_win32_directory_monitor_finalize (GObject *base); 50 static gboolean g_win32_directory_monitor_cancel (GFileMonitor *base); 51 52 static GObject *g_win32_directory_monitor_constructor (GType type, 53 guint n_construct_properties, 54 GObjectConstructParam *construct_properties); 55 56 static gboolean 57 g_win32_directory_monitor_is_supported (void) 58 { 59 return TRUE; 60 } 61 62 static void 63 g_win32_directory_monitor_finalize (GObject *base) 64 { 65 GWin32DirectoryMonitor *self; 66 self = G_WIN32_DIRECTORY_MONITOR (base); 67 68 g_free (self->priv->file_notify_buffer); 69 g_free (self->priv); 70 71 if (G_OBJECT_CLASS (g_win32_directory_monitor_parent_class)->finalize) 72 (*G_OBJECT_CLASS (g_win32_directory_monitor_parent_class)->finalize) (base); 73 } 74 75 static gboolean 76 g_win32_directory_monitor_cancel (GFileMonitor *base) 77 { 78 GWin32DirectoryMonitor *self; 79 self = G_WIN32_DIRECTORY_MONITOR (base); 80 81 /* This triggers a last callback() with nBytes=0 */ 82 if (self->priv->hDirectory != INVALID_HANDLE_VALUE) 83 CloseHandle (self->priv->hDirectory); 84 85 if (G_FILE_MONITOR_CLASS (g_win32_directory_monitor_parent_class)->cancel) 86 (*G_FILE_MONITOR_CLASS (g_win32_directory_monitor_parent_class)->cancel) (base); 87 return TRUE; 88 } 89 90 static void CALLBACK 91 g_win32_directory_monitor_callback (DWORD error, 92 DWORD nBytes, 93 LPOVERLAPPED lpOverlapped) 94 { 95 gulong offset; 96 PFILE_NOTIFY_INFORMATION pfile_notify_walker; 97 gulong file_name_len; 98 gchar *file_name; 99 gchar *path; 100 GFile *file; 101 GWin32DirectoryMonitorPrivate *priv = (GWin32DirectoryMonitorPrivate *) lpOverlapped; 102 103 static GFileMonitorEvent events[] = 104 { 105 0, 106 G_FILE_MONITOR_EVENT_CREATED, /* FILE_ACTION_ADDED */ 107 G_FILE_MONITOR_EVENT_DELETED, /* FILE_ACTION_REMOVED */ 108 G_FILE_MONITOR_EVENT_CHANGED, /* FILE_ACTION_MODIFIED */ 109 G_FILE_MONITOR_EVENT_DELETED, /* FILE_ACTION_RENAMED_OLD_NAME */ 110 G_FILE_MONITOR_EVENT_CREATED, /* FILE_ACTION_RENAMED_NEW_NAME */ 111 }; 112 113 if (!nBytes) /* Monitor was cancelled/finalized */ 114 return; 115 116 if (g_file_monitor_is_cancelled (G_FILE_MONITOR (priv->self))) 117 return; /* and ReadDirectoryChangesW doesn't get called this time */ 118 119 offset = 0; 120 do { 121 pfile_notify_walker = (PFILE_NOTIFY_INFORMATION)(priv->file_notify_buffer + offset); 122 offset += pfile_notify_walker->NextEntryOffset; 123 file_name = g_utf16_to_utf8 (pfile_notify_walker->FileName, pfile_notify_walker->FileNameLength / sizeof(WCHAR), NULL, &file_name_len, NULL); 124 path = g_build_filename(G_LOCAL_DIRECTORY_MONITOR (priv->self)->dirname, file_name, NULL); 125 file = g_file_new_for_path (path); 126 g_file_monitor_emit_event (priv->self, file, NULL, events [pfile_notify_walker->Action]); 127 g_object_unref (file); 128 g_free (path); 129 g_free (file_name); 130 } while (pfile_notify_walker->NextEntryOffset); 131 132 ReadDirectoryChangesW (priv->hDirectory, 133 (gpointer)priv->file_notify_buffer, 134 priv->buffer_allocated_bytes, 135 FALSE, 136 FILE_NOTIFY_CHANGE_FILE_NAME | 137 FILE_NOTIFY_CHANGE_DIR_NAME | 138 FILE_NOTIFY_CHANGE_ATTRIBUTES | 139 FILE_NOTIFY_CHANGE_SIZE, 140 &priv->buffer_filled_bytes, 141 &priv->overlapped, 142 g_win32_directory_monitor_callback); 143 } 144 145 static GObject * 146 g_win32_directory_monitor_constructor (GType type, 147 guint n_construct_properties, 148 GObjectConstructParam *construct_properties) { 149 GObject *obj; 150 GWin32DirectoryMonitorClass *klass; 151 GObjectClass *parent_class; 152 GWin32DirectoryMonitor *self; 153 wchar_t *wdirname; 154 gboolean result; 155 156 klass = G_WIN32_DIRECTORY_MONITOR_CLASS (g_type_class_peek (G_TYPE_WIN32_DIRECTORY_MONITOR)); 157 parent_class = G_OBJECT_CLASS (g_type_class_peek_parent (klass)); 158 obj = parent_class->constructor (type, n_construct_properties, construct_properties); 159 self = G_WIN32_DIRECTORY_MONITOR (obj); 160 wdirname = g_utf8_to_utf16 (G_LOCAL_DIRECTORY_MONITOR (obj)->dirname, -1, NULL, NULL, NULL); 161 162 self->priv->hDirectory = CreateFileW (wdirname, 163 FILE_LIST_DIRECTORY, 164 FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE, 165 166 NULL, 167 OPEN_EXISTING, 168 FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OVERLAPPED, 169 NULL); 170 g_free (wdirname); 171 if (self->priv->hDirectory == INVALID_HANDLE_VALUE) 172 { 173 /* Ignore errors */ 174 return obj; 175 } 176 177 result = ReadDirectoryChangesW (self->priv->hDirectory, 178 (gpointer)self->priv->file_notify_buffer, 179 self->priv->buffer_allocated_bytes, 180 FALSE, 181 FILE_NOTIFY_CHANGE_FILE_NAME | 182 FILE_NOTIFY_CHANGE_DIR_NAME | 183 FILE_NOTIFY_CHANGE_ATTRIBUTES | 184 FILE_NOTIFY_CHANGE_SIZE, 185 &self->priv->buffer_filled_bytes, 186 &self->priv->overlapped, 187 g_win32_directory_monitor_callback); 188 /* Ignore errors */ 189 190 return obj; 191 } 192 193 static void 194 g_win32_directory_monitor_class_init (GWin32DirectoryMonitorClass *klass) 195 { 196 g_win32_directory_monitor_parent_class = g_type_class_peek_parent (klass); 197 198 G_OBJECT_CLASS (klass)->constructor = g_win32_directory_monitor_constructor; 199 G_OBJECT_CLASS (klass)->finalize = g_win32_directory_monitor_finalize; 200 G_FILE_MONITOR_CLASS (klass)->cancel = g_win32_directory_monitor_cancel; 201 202 G_LOCAL_DIRECTORY_MONITOR_CLASS (klass)->mount_notify = FALSE; 203 G_LOCAL_DIRECTORY_MONITOR_CLASS (klass)->is_supported = g_win32_directory_monitor_is_supported; 204 } 205 206 static void 207 g_win32_directory_monitor_init (GWin32DirectoryMonitor *self) 208 { 209 self->priv = (GWin32DirectoryMonitorPrivate*)g_new0 (GWin32DirectoryMonitorPrivate, 1); 210 g_assert (self->priv != 0); 211 212 self->priv->buffer_allocated_bytes = 32768; 213 self->priv->file_notify_buffer = g_new0 (gchar, self->priv->buffer_allocated_bytes); 214 g_assert (self->priv->file_notify_buffer); 215 216 self->priv->self = G_FILE_MONITOR (self); 217 } 218
