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glib/gio/glocalfilemonitor.c
Ondrej Holy a8f97cbe8e glocalfile: Rename g_local_file_is_remote 
The g_local_file_is_remote function is misleading as it works only for
NFS filesystem types and only for locations in home directorly. Let's
rename it to g_local_file_is_nfs_home to make it obvious.
2020-06-19 11:34:42 +02:00

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/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2006-2007 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* Author: Alexander Larsson <alexl@redhat.com>
*/
#include "config.h"
#include "gioenumtypes.h"
#include "glocalfilemonitor.h"
#include "giomodule-priv.h"
#include "gioerror.h"
#include "glibintl.h"
#include "glocalfile.h"
#include "glib-private.h"
#include <string.h>
#define DEFAULT_RATE_LIMIT 800 * G_TIME_SPAN_MILLISECOND
#define VIRTUAL_CHANGES_DONE_DELAY 2 * G_TIME_SPAN_SECOND
/* GFileMonitorSource is a GSource responsible for emitting the changed
* signals in the owner-context of the GFileMonitor.
*
* It contains functionality for cross-thread queuing of events. It
* also handles merging of CHANGED events and emission of CHANGES_DONE
* events.
*
* We use the "priv" pointer in the external struct to store it.
*/
struct _GFileMonitorSource {
GSource source;
GMutex lock;
GWeakRef instance_ref;
GFileMonitorFlags flags;
gchar *dirname;
gchar *basename;
gchar *filename;
GSequence *pending_changes; /* sorted by ready time */
GHashTable *pending_changes_table;
GQueue event_queue;
gint64 rate_limit;
};
/* PendingChange is a struct to keep track of a file that needs to have
* (at least) a CHANGES_DONE_HINT event sent for it in the near future.
*
* If 'dirty' is TRUE then a CHANGED event also needs to be sent.
*
* last_emission is the last time a CHANGED event was emitted. It is
* used to calculate the time to send the next event.
*/
typedef struct {
gchar *child;
guint64 last_emission : 63;
guint64 dirty : 1;
} PendingChange;
/* QueuedEvent is a signal that will be sent immediately, as soon as the
* source gets a chance to dispatch. The existence of any queued event
* implies that the source is ready now.
*/
typedef struct
{
GFileMonitorEvent event_type;
GFile *child;
GFile *other;
} QueuedEvent;
static gint64
pending_change_get_ready_time (const PendingChange *change,
GFileMonitorSource *fms)
{
if (change->dirty)
return change->last_emission + fms->rate_limit;
else
return change->last_emission + VIRTUAL_CHANGES_DONE_DELAY;
}
static int
pending_change_compare_ready_time (gconstpointer a_p,
gconstpointer b_p,
gpointer user_data)
{
GFileMonitorSource *fms = user_data;
const PendingChange *a = a_p;
const PendingChange *b = b_p;
gint64 ready_time_a;
gint64 ready_time_b;
ready_time_a = pending_change_get_ready_time (a, fms);
ready_time_b = pending_change_get_ready_time (b, fms);
if (ready_time_a < ready_time_b)
return -1;
else
return ready_time_a > ready_time_b;
}
static void
pending_change_free (gpointer data)
{
PendingChange *change = data;
g_free (change->child);
g_slice_free (PendingChange, change);
}
static void
queued_event_free (QueuedEvent *event)
{
g_object_unref (event->child);
if (event->other)
g_object_unref (event->other);
g_slice_free (QueuedEvent, event);
}
static gint64
g_file_monitor_source_get_ready_time (GFileMonitorSource *fms)
{
GSequenceIter *iter;
if (fms->event_queue.length)
return 0;
iter = g_sequence_get_begin_iter (fms->pending_changes);
if (g_sequence_iter_is_end (iter))
return -1;
return pending_change_get_ready_time (g_sequence_get (iter), fms);
}
static void
g_file_monitor_source_update_ready_time (GFileMonitorSource *fms)
{
g_source_set_ready_time ((GSource *) fms, g_file_monitor_source_get_ready_time (fms));
}
static GSequenceIter *
g_file_monitor_source_find_pending_change (GFileMonitorSource *fms,
const gchar *child)
{
return g_hash_table_lookup (fms->pending_changes_table, child);
}
static void
g_file_monitor_source_add_pending_change (GFileMonitorSource *fms,
const gchar *child,
gint64 now)
{
PendingChange *change;
GSequenceIter *iter;
change = g_slice_new (PendingChange);
change->child = g_strdup (child);
change->last_emission = now;
change->dirty = FALSE;
iter = g_sequence_insert_sorted (fms->pending_changes, change, pending_change_compare_ready_time, fms);
g_hash_table_insert (fms->pending_changes_table, change->child, iter);
}
static gboolean
g_file_monitor_source_set_pending_change_dirty (GFileMonitorSource *fms,
GSequenceIter *iter)
{
PendingChange *change;
change = g_sequence_get (iter);
/* if it was already dirty then this change is 'uninteresting' */
if (change->dirty)
return FALSE;
change->dirty = TRUE;
g_sequence_sort_changed (iter, pending_change_compare_ready_time, fms);
return TRUE;
}
static gboolean
g_file_monitor_source_get_pending_change_dirty (GFileMonitorSource *fms,
GSequenceIter *iter)
{
PendingChange *change;
change = g_sequence_get (iter);
return change->dirty;
}
static void
g_file_monitor_source_remove_pending_change (GFileMonitorSource *fms,
GSequenceIter *iter,
const gchar *child)
{
/* must remove the hash entry first -- its key is owned by the data
* which will be freed when removing the sequence iter
*/
g_hash_table_remove (fms->pending_changes_table, child);
g_sequence_remove (iter);
}
static void
g_file_monitor_source_queue_event (GFileMonitorSource *fms,
GFileMonitorEvent event_type,
const gchar *child,
GFile *other)
{
QueuedEvent *event;
event = g_slice_new (QueuedEvent);
event->event_type = event_type;
if (child != NULL && fms->dirname != NULL)
event->child = g_local_file_new_from_dirname_and_basename (fms->dirname, child);
else if (child != NULL)
{
gchar *dirname = g_path_get_dirname (fms->filename);
event->child = g_local_file_new_from_dirname_and_basename (dirname, child);
g_free (dirname);
}
else if (fms->dirname)
event->child = _g_local_file_new (fms->dirname);
else if (fms->filename)
event->child = _g_local_file_new (fms->filename);
event->other = other;
if (other)
g_object_ref (other);
g_queue_push_tail (&fms->event_queue, event);
}
static gboolean
g_file_monitor_source_file_changed (GFileMonitorSource *fms,
const gchar *child,
gint64 now)
{
GSequenceIter *pending;
gboolean interesting;
pending = g_file_monitor_source_find_pending_change (fms, child);
/* If there is no pending change, emit one and create a record,
* else: just mark the existing record as dirty.
*/
if (!pending)
{
g_file_monitor_source_queue_event (fms, G_FILE_MONITOR_EVENT_CHANGED, child, NULL);
g_file_monitor_source_add_pending_change (fms, child, now);
interesting = TRUE;
}
else
interesting = g_file_monitor_source_set_pending_change_dirty (fms, pending);
g_file_monitor_source_update_ready_time (fms);
return interesting;
}
static void
g_file_monitor_source_file_changes_done (GFileMonitorSource *fms,
const gchar *child)
{
GSequenceIter *pending;
pending = g_file_monitor_source_find_pending_change (fms, child);
if (pending)
{
/* If it is dirty, make sure we push out the last CHANGED event */
if (g_file_monitor_source_get_pending_change_dirty (fms, pending))
g_file_monitor_source_queue_event (fms, G_FILE_MONITOR_EVENT_CHANGED, child, NULL);
g_file_monitor_source_queue_event (fms, G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT, child, NULL);
g_file_monitor_source_remove_pending_change (fms, pending, child);
}
}
static void
g_file_monitor_source_file_created (GFileMonitorSource *fms,
const gchar *child,
gint64 event_time)
{
/* Unlikely, but if we have pending changes for this filename, make
* sure we flush those out first, before creating the new ones.
*/
g_file_monitor_source_file_changes_done (fms, child);
/* Emit CREATE and add a pending changes record */
g_file_monitor_source_queue_event (fms, G_FILE_MONITOR_EVENT_CREATED, child, NULL);
g_file_monitor_source_add_pending_change (fms, child, event_time);
}
static void
g_file_monitor_source_send_event (GFileMonitorSource *fms,
GFileMonitorEvent event_type,
const gchar *child,
GFile *other)
{
/* always flush any pending changes before we queue a new event */
g_file_monitor_source_file_changes_done (fms, child);
g_file_monitor_source_queue_event (fms, event_type, child, other);
}
static void
g_file_monitor_source_send_synthetic_created (GFileMonitorSource *fms,
const gchar *child)
{
g_file_monitor_source_file_changes_done (fms, child);
g_file_monitor_source_queue_event (fms, G_FILE_MONITOR_EVENT_CREATED, child, NULL);
g_file_monitor_source_queue_event (fms, G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT, child, NULL);
}
#ifndef G_DISABLE_ASSERT
static gboolean
is_basename (const gchar *name)
{
if (name[0] == '.' && ((name[1] == '.' && name[2] == '\0') || name[1] == '\0'))
return FALSE;
return !strchr (name, '/');
}
#endif /* !G_DISABLE_ASSERT */
gboolean
g_file_monitor_source_handle_event (GFileMonitorSource *fms,
GFileMonitorEvent event_type,
const gchar *child,
const gchar *rename_to,
GFile *other,
gint64 event_time)
{
gboolean interesting = TRUE;
GFileMonitor *instance = NULL;
g_assert (!child || is_basename (child));
g_assert (!rename_to || is_basename (rename_to));
if (fms->basename && (!child || !g_str_equal (child, fms->basename))
&& (!rename_to || !g_str_equal (rename_to, fms->basename)))
return TRUE;
g_mutex_lock (&fms->lock);
/* monitor is already gone -- don't bother */
instance = g_weak_ref_get (&fms->instance_ref);
if (instance == NULL)
{
g_mutex_unlock (&fms->lock);
return TRUE;
}
switch (event_type)
{
case G_FILE_MONITOR_EVENT_CREATED:
g_assert (!other && !rename_to);
g_file_monitor_source_file_created (fms, child, event_time);
break;
case G_FILE_MONITOR_EVENT_CHANGED:
g_assert (!other && !rename_to);
interesting = g_file_monitor_source_file_changed (fms, child, event_time);
break;
case G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT:
g_assert (!other && !rename_to);
g_file_monitor_source_file_changes_done (fms, child);
break;
case G_FILE_MONITOR_EVENT_MOVED_IN:
g_assert (!rename_to);
if (fms->flags & G_FILE_MONITOR_WATCH_MOVES)
g_file_monitor_source_send_event (fms, G_FILE_MONITOR_EVENT_MOVED_IN, child, other);
else
g_file_monitor_source_send_synthetic_created (fms, child);
break;
case G_FILE_MONITOR_EVENT_MOVED_OUT:
g_assert (!rename_to);
if (fms->flags & G_FILE_MONITOR_WATCH_MOVES)
g_file_monitor_source_send_event (fms, G_FILE_MONITOR_EVENT_MOVED_OUT, child, other);
else if (other && (fms->flags & G_FILE_MONITOR_SEND_MOVED))
g_file_monitor_source_send_event (fms, G_FILE_MONITOR_EVENT_MOVED, child, other);
else
g_file_monitor_source_send_event (fms, G_FILE_MONITOR_EVENT_DELETED, child, NULL);
break;
case G_FILE_MONITOR_EVENT_RENAMED:
g_assert (!other && rename_to);
if (fms->flags & (G_FILE_MONITOR_WATCH_MOVES | G_FILE_MONITOR_SEND_MOVED))
{
GFile *other;
const gchar *dirname;
gchar *allocated_dirname = NULL;
GFileMonitorEvent event;
event = (fms->flags & G_FILE_MONITOR_WATCH_MOVES) ? G_FILE_MONITOR_EVENT_RENAMED : G_FILE_MONITOR_EVENT_MOVED;
if (fms->dirname != NULL)
dirname = fms->dirname;
else
{
allocated_dirname = g_path_get_dirname (fms->filename);
dirname = allocated_dirname;
}
other = g_local_file_new_from_dirname_and_basename (dirname, rename_to);
g_file_monitor_source_file_changes_done (fms, rename_to);
g_file_monitor_source_send_event (fms, event, child, other);
g_object_unref (other);
g_free (allocated_dirname);
}
else
{
g_file_monitor_source_send_event (fms, G_FILE_MONITOR_EVENT_DELETED, child, NULL);
g_file_monitor_source_send_synthetic_created (fms, rename_to);
}
break;
case G_FILE_MONITOR_EVENT_DELETED:
case G_FILE_MONITOR_EVENT_ATTRIBUTE_CHANGED:
case G_FILE_MONITOR_EVENT_PRE_UNMOUNT:
case G_FILE_MONITOR_EVENT_UNMOUNTED:
g_assert (!other && !rename_to);
g_file_monitor_source_send_event (fms, event_type, child, NULL);
break;
case G_FILE_MONITOR_EVENT_MOVED:
/* was never available in this API */
default:
g_assert_not_reached ();
}
g_file_monitor_source_update_ready_time (fms);
g_mutex_unlock (&fms->lock);
g_clear_object (&instance);
return interesting;
}
static gint64
g_file_monitor_source_get_rate_limit (GFileMonitorSource *fms)
{
gint64 rate_limit;
g_mutex_lock (&fms->lock);
rate_limit = fms->rate_limit;
g_mutex_unlock (&fms->lock);
return rate_limit;
}
static gboolean
g_file_monitor_source_set_rate_limit (GFileMonitorSource *fms,
gint64 rate_limit)
{
gboolean changed;
g_mutex_lock (&fms->lock);
if (rate_limit != fms->rate_limit)
{
fms->rate_limit = rate_limit;
g_sequence_sort (fms->pending_changes, pending_change_compare_ready_time, fms);
g_file_monitor_source_update_ready_time (fms);
changed = TRUE;
}
else
changed = FALSE;
g_mutex_unlock (&fms->lock);
return changed;
}
static gboolean
g_file_monitor_source_dispatch (GSource *source,
GSourceFunc callback,
gpointer user_data)
{
GFileMonitorSource *fms = (GFileMonitorSource *) source;
QueuedEvent *event;
GQueue event_queue;
gint64 now;
GFileMonitor *instance = NULL;
/* make sure the monitor still exists */
instance = g_weak_ref_get (&fms->instance_ref);
if (instance == NULL)
return FALSE;
now = g_source_get_time (source);
/* Acquire the lock once and grab all events in one go, handling the
* queued events first. This avoids strange possibilities in cases of
* long delays, such as CHANGED events coming before CREATED events.
*
* We do this by converting the applicable pending changes into queued
* events (after the ones already queued) and then stealing the entire
* event queue in one go.
*/
g_mutex_lock (&fms->lock);
/* Create events for any pending changes that are due to fire */
while (!g_sequence_is_empty (fms->pending_changes))
{
GSequenceIter *iter = g_sequence_get_begin_iter (fms->pending_changes);
PendingChange *pending = g_sequence_get (iter);
/* We've gotten to a pending change that's not ready. Stop. */
if (pending_change_get_ready_time (pending, fms) > now)
break;
if (pending->dirty)
{
/* It's time to send another CHANGED and update the record */
g_file_monitor_source_queue_event (fms, G_FILE_MONITOR_EVENT_CHANGED, pending->child, NULL);
pending->last_emission = now;
pending->dirty = FALSE;
g_sequence_sort_changed (iter, pending_change_compare_ready_time, fms);
}
else
{
/* It's time to send CHANGES_DONE and remove the pending record */
g_file_monitor_source_queue_event (fms, G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT, pending->child, NULL);
g_file_monitor_source_remove_pending_change (fms, iter, pending->child);
}
}
/* Steal the queue */
memcpy (&event_queue, &fms->event_queue, sizeof event_queue);
memset (&fms->event_queue, 0, sizeof fms->event_queue);
g_file_monitor_source_update_ready_time (fms);
g_clear_object (&instance);
g_mutex_unlock (&fms->lock);
/* We now have our list of events to deliver */
while ((event = g_queue_pop_head (&event_queue)))
{
/* an event handler could destroy 'instance', so check each time */
instance = g_weak_ref_get (&fms->instance_ref);
if (instance != NULL)
g_file_monitor_emit_event (instance, event->child, event->other, event->event_type);
g_clear_object (&instance);
queued_event_free (event);
}
return TRUE;
}
static void
g_file_monitor_source_dispose (GFileMonitorSource *fms)
{
GHashTableIter iter;
gpointer seqiter;
QueuedEvent *event;
g_mutex_lock (&fms->lock);
g_hash_table_iter_init (&iter, fms->pending_changes_table);
while (g_hash_table_iter_next (&iter, NULL, &seqiter))
{
g_hash_table_iter_remove (&iter);
g_sequence_remove (seqiter);
}
while ((event = g_queue_pop_head (&fms->event_queue)))
queued_event_free (event);
g_assert (g_sequence_is_empty (fms->pending_changes));
g_assert (g_hash_table_size (fms->pending_changes_table) == 0);
g_assert (fms->event_queue.length == 0);
g_weak_ref_set (&fms->instance_ref, NULL);
g_file_monitor_source_update_ready_time (fms);
g_mutex_unlock (&fms->lock);
g_source_destroy ((GSource *) fms);
}
static void
g_file_monitor_source_finalize (GSource *source)
{
GFileMonitorSource *fms = (GFileMonitorSource *) source;
/* should already have been cleared in dispose of the monitor */
g_assert (g_weak_ref_get (&fms->instance_ref) == NULL);
g_weak_ref_clear (&fms->instance_ref);
g_assert (g_sequence_is_empty (fms->pending_changes));
g_assert (g_hash_table_size (fms->pending_changes_table) == 0);
g_assert (fms->event_queue.length == 0);
g_hash_table_unref (fms->pending_changes_table);
g_sequence_free (fms->pending_changes);
g_free (fms->dirname);
g_free (fms->basename);
g_free (fms->filename);
g_mutex_clear (&fms->lock);
}
static guint
str_hash0 (gconstpointer str)
{
return str ? g_str_hash (str) : 0;
}
static gboolean
str_equal0 (gconstpointer a,
gconstpointer b)
{
return g_strcmp0 (a, b) == 0;
}
static GFileMonitorSource *
g_file_monitor_source_new (gpointer instance,
const gchar *filename,
gboolean is_directory,
GFileMonitorFlags flags)
{
static GSourceFuncs source_funcs = {
NULL, NULL,
g_file_monitor_source_dispatch,
g_file_monitor_source_finalize
};
GFileMonitorSource *fms;
GSource *source;
source = g_source_new (&source_funcs, sizeof (GFileMonitorSource));
fms = (GFileMonitorSource *) source;
g_source_set_name (source, "GFileMonitorSource");
g_mutex_init (&fms->lock);
g_weak_ref_init (&fms->instance_ref, instance);
fms->pending_changes = g_sequence_new (pending_change_free);
fms->pending_changes_table = g_hash_table_new (str_hash0, str_equal0);
fms->rate_limit = DEFAULT_RATE_LIMIT;
fms->flags = flags;
if (is_directory)
{
fms->dirname = g_strdup (filename);
fms->basename = NULL;
fms->filename = NULL;
}
else if (flags & G_FILE_MONITOR_WATCH_HARD_LINKS)
{
fms->dirname = NULL;
fms->basename = NULL;
fms->filename = g_strdup (filename);
}
else
{
fms->dirname = g_path_get_dirname (filename);
fms->basename = g_path_get_basename (filename);
fms->filename = NULL;
}
return fms;
}
G_DEFINE_ABSTRACT_TYPE (GLocalFileMonitor, g_local_file_monitor, G_TYPE_FILE_MONITOR)
enum {
PROP_0,
PROP_RATE_LIMIT,
};
static void
g_local_file_monitor_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec)
{
GLocalFileMonitor *monitor = G_LOCAL_FILE_MONITOR (object);
gint64 rate_limit;
g_assert (prop_id == PROP_RATE_LIMIT);
rate_limit = g_file_monitor_source_get_rate_limit (monitor->source);
rate_limit /= G_TIME_SPAN_MILLISECOND;
g_value_set_int (value, rate_limit);
}
static void
g_local_file_monitor_set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec)
{
GLocalFileMonitor *monitor = G_LOCAL_FILE_MONITOR (object);
gint64 rate_limit;
g_assert (prop_id == PROP_RATE_LIMIT);
rate_limit = g_value_get_int (value);
rate_limit *= G_TIME_SPAN_MILLISECOND;
if (g_file_monitor_source_set_rate_limit (monitor->source, rate_limit))
g_object_notify (object, "rate-limit");
}
#ifndef G_OS_WIN32
static void
g_local_file_monitor_mounts_changed (GUnixMountMonitor *mount_monitor,
gpointer user_data)
{
GLocalFileMonitor *local_monitor = user_data;
GUnixMountEntry *mount;
gboolean is_mounted;
GFile *file;
/* Emulate unmount detection */
mount = g_unix_mount_at (local_monitor->source->dirname, NULL);
is_mounted = mount != NULL;
if (mount)
g_unix_mount_free (mount);
if (local_monitor->was_mounted != is_mounted)
{
if (local_monitor->was_mounted && !is_mounted)
{
file = g_file_new_for_path (local_monitor->source->dirname);
g_file_monitor_emit_event (G_FILE_MONITOR (local_monitor), file, NULL, G_FILE_MONITOR_EVENT_UNMOUNTED);
g_object_unref (file);
}
local_monitor->was_mounted = is_mounted;
}
}
#endif
static void
g_local_file_monitor_start (GLocalFileMonitor *local_monitor,
const gchar *filename,
gboolean is_directory,
GFileMonitorFlags flags,
GMainContext *context)
{
GLocalFileMonitorClass *class = G_LOCAL_FILE_MONITOR_GET_CLASS (local_monitor);
GFileMonitorSource *source;
g_return_if_fail (G_IS_LOCAL_FILE_MONITOR (local_monitor));
g_assert (!local_monitor->source);
source = g_file_monitor_source_new (local_monitor, filename, is_directory, flags);
local_monitor->source = source; /* owns the ref */
if (is_directory && !class->mount_notify && (flags & G_FILE_MONITOR_WATCH_MOUNTS))
{
#ifdef G_OS_WIN32
/*claim everything was mounted */
local_monitor->was_mounted = TRUE;
#else
GUnixMountEntry *mount;
/* Emulate unmount detection */
mount = g_unix_mount_at (local_monitor->source->dirname, NULL);
local_monitor->was_mounted = mount != NULL;
if (mount)
g_unix_mount_free (mount);
local_monitor->mount_monitor = g_unix_mount_monitor_get ();
g_signal_connect_object (local_monitor->mount_monitor, "mounts-changed",
G_CALLBACK (g_local_file_monitor_mounts_changed), local_monitor, 0);
#endif
}
g_source_attach ((GSource *) source, context);
G_LOCAL_FILE_MONITOR_GET_CLASS (local_monitor)->start (local_monitor,
source->dirname, source->basename, source->filename,
source);
}
static void
g_local_file_monitor_dispose (GObject *object)
{
GLocalFileMonitor *local_monitor = G_LOCAL_FILE_MONITOR (object);
g_file_monitor_source_dispose (local_monitor->source);
G_OBJECT_CLASS (g_local_file_monitor_parent_class)->dispose (object);
}
static void
g_local_file_monitor_finalize (GObject *object)
{
GLocalFileMonitor *local_monitor = G_LOCAL_FILE_MONITOR (object);
g_source_unref ((GSource *) local_monitor->source);
G_OBJECT_CLASS (g_local_file_monitor_parent_class)->finalize (object);
}
static void
g_local_file_monitor_init (GLocalFileMonitor* local_monitor)
{
}
static void g_local_file_monitor_class_init (GLocalFileMonitorClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
gobject_class->get_property = g_local_file_monitor_get_property;
gobject_class->set_property = g_local_file_monitor_set_property;
gobject_class->dispose = g_local_file_monitor_dispose;
gobject_class->finalize = g_local_file_monitor_finalize;
g_object_class_override_property (gobject_class, PROP_RATE_LIMIT, "rate-limit");
}
static GLocalFileMonitor *
g_local_file_monitor_new (gboolean is_remote_fs,
gboolean is_directory,
GError **error)
{
GType type = G_TYPE_INVALID;
if (is_remote_fs)
type = _g_io_module_get_default_type (G_NFS_FILE_MONITOR_EXTENSION_POINT_NAME,
"GIO_USE_FILE_MONITOR",
G_STRUCT_OFFSET (GLocalFileMonitorClass, is_supported));
/* Fallback rather to poll file monitor for remote files, see gfile.c. */
if (type == G_TYPE_INVALID && (!is_remote_fs || is_directory))
type = _g_io_module_get_default_type (G_LOCAL_FILE_MONITOR_EXTENSION_POINT_NAME,
"GIO_USE_FILE_MONITOR",
G_STRUCT_OFFSET (GLocalFileMonitorClass, is_supported));
if (type == G_TYPE_INVALID)
{
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_FAILED,
_("Unable to find default local file monitor type"));
return NULL;
}
return g_object_new (type, NULL);
}
GFileMonitor *
g_local_file_monitor_new_for_path (const gchar *pathname,
gboolean is_directory,
GFileMonitorFlags flags,
GError **error)
{
GLocalFileMonitor *monitor;
gboolean is_remote_fs;
is_remote_fs = g_local_file_is_nfs_home (pathname);
monitor = g_local_file_monitor_new (is_remote_fs, is_directory, error);
if (monitor)
g_local_file_monitor_start (monitor, pathname, is_directory, flags, g_main_context_get_thread_default ());
return G_FILE_MONITOR (monitor);
}
GFileMonitor *
g_local_file_monitor_new_in_worker (const gchar *pathname,
gboolean is_directory,
GFileMonitorFlags flags,
GFileMonitorCallback callback,
gpointer user_data,
GClosureNotify destroy_user_data,
GError **error)
{
GLocalFileMonitor *monitor;
gboolean is_remote_fs;
is_remote_fs = g_local_file_is_nfs_home (pathname);
monitor = g_local_file_monitor_new (is_remote_fs, is_directory, error);
if (monitor)
{
if (callback)
g_signal_connect_data (monitor, "changed", G_CALLBACK (callback),
user_data, destroy_user_data, 0 /* flags */);
g_local_file_monitor_start (monitor, pathname, is_directory, flags, GLIB_PRIVATE_CALL(g_get_worker_context) ());
}
return G_FILE_MONITOR (monitor);
}
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