1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
3 /* GIO - GLib Input, Output and Streaming Library
5 * Copyright (C) 2006-2007 Red Hat, Inc.
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General
18 * Public License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20 * Boston, MA 02111-1307, USA.
22 * Author: Alexander Larsson <alexl@redhat.com>
23 * David Zeuthen <davidz@redhat.com>
31 #include "gunionvolumemonitor.h"
32 #include "gmountprivate.h"
33 #include "giomodule-priv.h"
35 #include "gunixvolumemonitor.h"
37 #include "gnativevolumemonitor.h"
43 struct _GUnionVolumeMonitor {
44 GVolumeMonitor parent;
49 static void g_union_volume_monitor_remove_monitor (GUnionVolumeMonitor *union_monitor,
50 GVolumeMonitor *child_monitor);
53 #define g_union_volume_monitor_get_type _g_union_volume_monitor_get_type
54 G_DEFINE_TYPE (GUnionVolumeMonitor, g_union_volume_monitor, G_TYPE_VOLUME_MONITOR);
56 static GStaticRecMutex the_volume_monitor_mutex = G_STATIC_REC_MUTEX_INIT;
58 static GUnionVolumeMonitor *the_volume_monitor = NULL;
61 g_union_volume_monitor_finalize (GObject *object)
63 GUnionVolumeMonitor *monitor;
64 GVolumeMonitor *child_monitor;
66 monitor = G_UNION_VOLUME_MONITOR (object);
68 while (monitor->monitors != NULL)
70 child_monitor = monitor->monitors->data;
71 g_union_volume_monitor_remove_monitor (monitor,
73 g_object_unref (child_monitor);
76 G_OBJECT_CLASS (g_union_volume_monitor_parent_class)->finalize (object);
80 g_union_volume_monitor_dispose (GObject *object)
82 GUnionVolumeMonitor *monitor;
84 monitor = G_UNION_VOLUME_MONITOR (object);
86 g_static_rec_mutex_lock (&the_volume_monitor_mutex);
87 the_volume_monitor = NULL;
88 g_static_rec_mutex_unlock (&the_volume_monitor_mutex);
90 G_OBJECT_CLASS (g_union_volume_monitor_parent_class)->dispose (object);
94 get_mounts (GVolumeMonitor *volume_monitor)
96 GUnionVolumeMonitor *monitor;
97 GVolumeMonitor *child_monitor;
101 monitor = G_UNION_VOLUME_MONITOR (volume_monitor);
105 g_static_rec_mutex_lock (&the_volume_monitor_mutex);
107 for (l = monitor->monitors; l != NULL; l = l->next)
109 child_monitor = l->data;
111 res = g_list_concat (res, g_volume_monitor_get_mounts (child_monitor));
114 g_static_rec_mutex_unlock (&the_volume_monitor_mutex);
120 get_volumes (GVolumeMonitor *volume_monitor)
122 GUnionVolumeMonitor *monitor;
123 GVolumeMonitor *child_monitor;
127 monitor = G_UNION_VOLUME_MONITOR (volume_monitor);
131 g_static_rec_mutex_lock (&the_volume_monitor_mutex);
133 for (l = monitor->monitors; l != NULL; l = l->next)
135 child_monitor = l->data;
137 res = g_list_concat (res, g_volume_monitor_get_volumes (child_monitor));
140 g_static_rec_mutex_unlock (&the_volume_monitor_mutex);
146 get_connected_drives (GVolumeMonitor *volume_monitor)
148 GUnionVolumeMonitor *monitor;
149 GVolumeMonitor *child_monitor;
153 monitor = G_UNION_VOLUME_MONITOR (volume_monitor);
157 g_static_rec_mutex_lock (&the_volume_monitor_mutex);
159 for (l = monitor->monitors; l != NULL; l = l->next)
161 child_monitor = l->data;
163 res = g_list_concat (res, g_volume_monitor_get_connected_drives (child_monitor));
166 g_static_rec_mutex_unlock (&the_volume_monitor_mutex);
172 get_volume_for_uuid (GVolumeMonitor *volume_monitor, const char *uuid)
174 GUnionVolumeMonitor *monitor;
175 GVolumeMonitor *child_monitor;
179 monitor = G_UNION_VOLUME_MONITOR (volume_monitor);
183 g_static_rec_mutex_lock (&the_volume_monitor_mutex);
185 for (l = monitor->monitors; l != NULL; l = l->next)
187 child_monitor = l->data;
189 volume = g_volume_monitor_get_volume_for_uuid (child_monitor, uuid);
195 g_static_rec_mutex_unlock (&the_volume_monitor_mutex);
201 get_mount_for_uuid (GVolumeMonitor *volume_monitor, const char *uuid)
203 GUnionVolumeMonitor *monitor;
204 GVolumeMonitor *child_monitor;
208 monitor = G_UNION_VOLUME_MONITOR (volume_monitor);
212 g_static_rec_mutex_lock (&the_volume_monitor_mutex);
214 for (l = monitor->monitors; l != NULL; l = l->next)
216 child_monitor = l->data;
218 mount = g_volume_monitor_get_mount_for_uuid (child_monitor, uuid);
224 g_static_rec_mutex_unlock (&the_volume_monitor_mutex);
230 g_union_volume_monitor_class_init (GUnionVolumeMonitorClass *klass)
232 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
233 GVolumeMonitorClass *monitor_class = G_VOLUME_MONITOR_CLASS (klass);
235 gobject_class->finalize = g_union_volume_monitor_finalize;
236 gobject_class->dispose = g_union_volume_monitor_dispose;
238 monitor_class->get_connected_drives = get_connected_drives;
239 monitor_class->get_volumes = get_volumes;
240 monitor_class->get_mounts = get_mounts;
241 monitor_class->get_volume_for_uuid = get_volume_for_uuid;
242 monitor_class->get_mount_for_uuid = get_mount_for_uuid;
246 child_volume_added (GVolumeMonitor *child_monitor,
247 GVolume *child_volume,
248 GUnionVolumeMonitor *union_monitor)
250 g_signal_emit_by_name (union_monitor,
256 child_volume_removed (GVolumeMonitor *child_monitor,
257 GVolume *child_volume,
258 GUnionVolumeMonitor *union_monitor)
260 g_signal_emit_by_name (union_monitor,
266 child_volume_changed (GVolumeMonitor *child_monitor,
267 GVolume *child_volume,
268 GUnionVolumeMonitor *union_monitor)
270 g_signal_emit_by_name (union_monitor,
276 child_mount_added (GVolumeMonitor *child_monitor,
278 GUnionVolumeMonitor *union_monitor)
280 g_signal_emit_by_name (union_monitor,
286 child_mount_removed (GVolumeMonitor *child_monitor,
288 GUnionVolumeMonitor *union_monitor)
290 g_signal_emit_by_name (union_monitor,
296 child_mount_pre_unmount (GVolumeMonitor *child_monitor,
298 GUnionVolumeMonitor *union_monitor)
300 g_signal_emit_by_name (union_monitor,
307 child_mount_changed (GVolumeMonitor *child_monitor,
309 GUnionVolumeMonitor *union_monitor)
311 g_signal_emit_by_name (union_monitor,
317 child_drive_connected (GVolumeMonitor *child_monitor,
319 GUnionVolumeMonitor *union_monitor)
321 g_signal_emit_by_name (union_monitor,
327 child_drive_disconnected (GVolumeMonitor *child_monitor,
329 GUnionVolumeMonitor *union_monitor)
331 g_signal_emit_by_name (union_monitor,
332 "drive_disconnected",
337 child_drive_changed (GVolumeMonitor *child_monitor,
339 GUnionVolumeMonitor *union_monitor)
341 g_signal_emit_by_name (union_monitor,
347 g_union_volume_monitor_add_monitor (GUnionVolumeMonitor *union_monitor,
348 GVolumeMonitor *volume_monitor)
350 if (g_list_find (union_monitor->monitors, volume_monitor))
353 union_monitor->monitors =
354 g_list_prepend (union_monitor->monitors,
355 g_object_ref (volume_monitor));
357 g_signal_connect (volume_monitor, "volume_added", (GCallback)child_volume_added, union_monitor);
358 g_signal_connect (volume_monitor, "volume_removed", (GCallback)child_volume_removed, union_monitor);
359 g_signal_connect (volume_monitor, "volume_changed", (GCallback)child_volume_changed, union_monitor);
360 g_signal_connect (volume_monitor, "mount_added", (GCallback)child_mount_added, union_monitor);
361 g_signal_connect (volume_monitor, "mount_removed", (GCallback)child_mount_removed, union_monitor);
362 g_signal_connect (volume_monitor, "mount_pre_unmount", (GCallback)child_mount_pre_unmount, union_monitor);
363 g_signal_connect (volume_monitor, "mount_changed", (GCallback)child_mount_changed, union_monitor);
364 g_signal_connect (volume_monitor, "drive_connected", (GCallback)child_drive_connected, union_monitor);
365 g_signal_connect (volume_monitor, "drive_disconnected", (GCallback)child_drive_disconnected, union_monitor);
366 g_signal_connect (volume_monitor, "drive_changed", (GCallback)child_drive_changed, union_monitor);
370 g_union_volume_monitor_remove_monitor (GUnionVolumeMonitor *union_monitor,
371 GVolumeMonitor *child_monitor)
375 l = g_list_find (union_monitor->monitors, child_monitor);
379 union_monitor->monitors = g_list_delete_link (union_monitor->monitors, l);
381 g_signal_handlers_disconnect_by_func (child_monitor, child_volume_added, union_monitor);
382 g_signal_handlers_disconnect_by_func (child_monitor, child_volume_removed, union_monitor);
383 g_signal_handlers_disconnect_by_func (child_monitor, child_volume_changed, union_monitor);
384 g_signal_handlers_disconnect_by_func (child_monitor, child_mount_added, union_monitor);
385 g_signal_handlers_disconnect_by_func (child_monitor, child_mount_removed, union_monitor);
386 g_signal_handlers_disconnect_by_func (child_monitor, child_mount_pre_unmount, union_monitor);
387 g_signal_handlers_disconnect_by_func (child_monitor, child_mount_changed, union_monitor);
388 g_signal_handlers_disconnect_by_func (child_monitor, child_drive_connected, union_monitor);
389 g_signal_handlers_disconnect_by_func (child_monitor, child_drive_disconnected, union_monitor);
390 g_signal_handlers_disconnect_by_func (child_monitor, child_drive_changed, union_monitor);
394 get_default_native_class (gpointer data)
396 GNativeVolumeMonitorClass *klass, *native_class, **native_class_out;
397 const char *use_this;
398 GIOExtensionPoint *ep;
399 GIOExtension *extension;
402 native_class_out = data;
404 use_this = g_getenv ("GIO_USE_VOLUME_MONITOR");
406 /* Ensure vfs in modules loaded */
407 _g_io_modules_ensure_loaded ();
409 ep = g_io_extension_point_lookup (G_NATIVE_VOLUME_MONITOR_EXTENSION_POINT_NAME);
414 extension = g_io_extension_point_get_extension_by_name (ep, use_this);
417 klass = G_NATIVE_VOLUME_MONITOR_CLASS (g_io_extension_ref_class (extension));
418 if (G_VOLUME_MONITOR_CLASS (klass)->is_supported())
419 native_class = klass;
421 g_type_class_unref (klass);
425 if (native_class == NULL)
427 for (l = g_io_extension_point_get_extensions (ep); l != NULL; l = l->next)
430 klass = G_NATIVE_VOLUME_MONITOR_CLASS (g_io_extension_ref_class (extension));
431 if (G_VOLUME_MONITOR_CLASS (klass)->is_supported())
433 native_class = klass;
437 g_type_class_unref (klass);
443 *native_class_out = native_class;
444 return G_TYPE_FROM_CLASS (native_class);
447 return G_TYPE_INVALID;
450 /* We return the class, with a ref taken.
451 * This way we avoid unloading the class/module
452 * between selecting the type and creating the
453 * instance on the first call.
455 static GNativeVolumeMonitorClass *
456 get_native_class (void)
458 static GOnce once_init = G_ONCE_INIT;
459 GTypeClass *type_class;
462 g_once (&once_init, (GThreadFunc)get_default_native_class, &type_class);
464 if (type_class == NULL && once_init.retval != GUINT_TO_POINTER(G_TYPE_INVALID))
465 type_class = g_type_class_ref ((GType)once_init.retval);
467 return (GNativeVolumeMonitorClass *)type_class;
471 g_union_volume_monitor_init (GUnionVolumeMonitor *union_monitor)
476 populate_union_monitor (GUnionVolumeMonitor *union_monitor)
478 GVolumeMonitor *monitor;
479 GNativeVolumeMonitorClass *native_class;
480 GVolumeMonitorClass *klass;
481 GIOExtensionPoint *ep;
482 GIOExtension *extension;
485 native_class = get_native_class ();
487 if (native_class != NULL)
489 monitor = g_object_new (G_TYPE_FROM_CLASS (native_class), NULL);
490 g_union_volume_monitor_add_monitor (union_monitor, monitor);
491 g_object_unref (monitor);
492 g_type_class_unref (native_class);
495 ep = g_io_extension_point_lookup (G_VOLUME_MONITOR_EXTENSION_POINT_NAME);
496 for (l = g_io_extension_point_get_extensions (ep); l != NULL; l = l->next)
500 klass = G_VOLUME_MONITOR_CLASS (g_io_extension_ref_class (extension));
501 if (klass->is_supported == NULL || klass->is_supported())
503 monitor = g_object_new (g_io_extension_get_type (extension), NULL);
504 g_union_volume_monitor_add_monitor (union_monitor, monitor);
505 g_object_unref (monitor);
507 g_type_class_unref (klass);
511 static GUnionVolumeMonitor *
512 g_union_volume_monitor_new (void)
514 GUnionVolumeMonitor *monitor;
516 monitor = g_object_new (G_TYPE_UNION_VOLUME_MONITOR, NULL);
522 * g_volume_monitor_get:
524 * Gets the volume monitor used by gio.
526 * Returns: a reference to the #GVolumeMonitor used by gio. Call
527 * g_object_unref() when done with it.
530 g_volume_monitor_get (void)
534 g_static_rec_mutex_lock (&the_volume_monitor_mutex);
536 if (the_volume_monitor)
537 vm = G_VOLUME_MONITOR (g_object_ref (the_volume_monitor));
540 the_volume_monitor = g_union_volume_monitor_new ();
541 populate_union_monitor (the_volume_monitor);
542 vm = G_VOLUME_MONITOR (the_volume_monitor);
545 g_static_rec_mutex_unlock (&the_volume_monitor_mutex);
551 * _g_mount_get_for_mount_path:
552 * @mountpoint: a string.
553 * @cancellable: a #GCancellable, or %NULL
555 * Returns: a #GMount for given @mount_path or %NULL.
558 _g_mount_get_for_mount_path (const char *mount_path,
559 GCancellable *cancellable)
561 GNativeVolumeMonitorClass *klass;
564 klass = get_native_class ();
570 if (klass->get_mount_for_mount_path)
572 g_static_rec_mutex_lock (&the_volume_monitor_mutex);
573 mount = klass->get_mount_for_mount_path (mount_path, cancellable);
574 g_static_rec_mutex_unlock (&the_volume_monitor_mutex);
577 /* TODO: How do we know this succeeded? Keep in mind that the native
578 * volume monitor may fail (e.g. not being able to connect to
579 * hald). Is the get_mount_for_mount_path() method allowed to
580 * return NULL? Seems like it is ... probably the method needs
581 * to take a boolean and write if it succeeds or not.. Messy.
585 g_type_class_unref (klass);
591 * g_volume_monitor_adopt_orphan_mount:
592 * @mount: a #GMount object to find a parent for
594 * This function should be called by any #GVolumeMonitor
595 * implementation when a new #GMount object is created that is not
596 * associated with a #GVolume object. It must be called just before
597 * emitting the @mount_added signal.
599 * If the return value is not %NULL, the caller must associate the
600 * returned #GVolume object with the #GMount. This involves returning
601 * it in it's g_mount_get_volume() implementation. The caller must
602 * also listen for the "removed" signal on the returned object
603 * and give up it's reference when handling that signal
605 * Similary, if implementing g_volume_monitor_adopt_orphan_mount(),
606 * the implementor must take a reference to @mount and return it in
607 * it's g_volume_get_mount() implemented. Also, the implementor must
608 * listen for the "unmounted" signal on @mount and give up it's
609 * reference upon handling that signal.
611 * There are two main use cases for this function.
613 * One is when implementing a user space file system driver that reads
614 * blocks of a block device that is already represented by the native
615 * volume monitor (for example a CD Audio file system driver). Such
616 * a driver will generate it's own #GMount object that needs to be
617 * assoicated with the #GVolume object that represents the volume.
619 * The other is for implementing a #GVolumeMonitor whose sole purpose
620 * is to return #GVolume objects representing entries in the users
621 * "favorite servers" list or similar.
623 * Returns: the #GVolume object that is the parent for @mount or %NULL
624 * if no wants to adopt the #GMount.
627 g_volume_monitor_adopt_orphan_mount (GMount *mount)
629 GVolumeMonitor *child_monitor;
630 GVolumeMonitorClass *child_monitor_class;
634 g_return_val_if_fail (mount != NULL, NULL);
636 if (the_volume_monitor == NULL)
641 g_static_rec_mutex_lock (&the_volume_monitor_mutex);
643 for (l = the_volume_monitor->monitors; l != NULL; l = l->next)
645 child_monitor = l->data;
646 child_monitor_class = G_VOLUME_MONITOR_GET_CLASS (child_monitor);
648 if (child_monitor_class->adopt_orphan_mount != NULL)
650 volume = child_monitor_class->adopt_orphan_mount (mount, child_monitor);
656 g_static_rec_mutex_unlock (&the_volume_monitor_mutex);
662 #define __G_UNION_VOLUME_MONITOR_C__
663 #include "gioaliasdef.c"