* 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, write to the
- * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
- * Boston, MA 02111-1307, USA.
+ * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* Author: Alexander Larsson <alexl@redhat.com>
*/
-#include <config.h>
+#include "config.h"
#include <string.h>
#include "gfilemonitor.h"
-#include "gio-marshal.h"
+#include "gioenumtypes.h"
+#include "gfile.h"
#include "gvfs.h"
#include "glibintl.h"
+
+struct _FileChange;
+typedef struct _FileChange FileChange;
+static void file_change_free (FileChange *change);
+
+/**
+ * SECTION:gfilemonitor
+ * @short_description: File Monitor
+ * @include: gio/gio.h
+ *
+ * Monitors a file or directory for changes.
+ *
+ * To obtain a #GFileMonitor for a file or directory, use
+ * g_file_monitor(), g_file_monitor_file(), or
+ * g_file_monitor_directory().
+ *
+ * To get informed about changes to the file or directory you are
+ * monitoring, connect to the #GFileMonitor::changed signal. The
+ * signal will be emitted in the
+ * [thread-default main context][g-main-context-push-thread-default]
+ * of the thread that the monitor was created in
+ * (though if the global default main context is blocked, this may
+ * cause notifications to be blocked even if the thread-default
+ * context is still running).
+ **/
+
+G_LOCK_DEFINE_STATIC(cancelled);
+
enum {
CHANGED,
LAST_SIGNAL
};
-G_DEFINE_ABSTRACT_TYPE (GFileMonitor, g_file_monitor, G_TYPE_OBJECT);
+typedef struct {
+ GFile *file;
+ guint32 last_sent_change_time; /* 0 == not sent */
+ guint32 send_delayed_change_at; /* 0 == never */
+ guint32 send_virtual_changes_done_at; /* 0 == never */
+} RateLimiter;
struct _GFileMonitorPrivate {
gboolean cancelled;
int rate_limit_msec;
/* Rate limiting change events */
- guint32 last_sent_change_time; /* Some monitonic clock in msecs */
- GFile *last_sent_change_file;
-
- guint send_delayed_change_timeout;
+ GHashTable *rate_limiter;
- /* Virtual CHANGES_DONE_HINT emission */
- GSource *virtual_changes_done_timeout;
- GFile *virtual_changes_done_file;
+ GMutex mutex;
+ GSource *pending_file_change_source;
+ GSList *pending_file_changes; /* FileChange */
+
+ GSource *timeout;
+ guint32 timeout_fires_at;
+
+ GMainContext *context;
+};
+
+enum {
+ PROP_0,
+ PROP_RATE_LIMIT,
+ PROP_CANCELLED,
+ PROP_CONTEXT
};
+/* work around a limitation of the aliasing foo */
+#undef g_file_monitor
+
+G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GFileMonitor, g_file_monitor, G_TYPE_OBJECT)
+
+static void
+g_file_monitor_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GFileMonitor *monitor;
+
+ monitor = G_FILE_MONITOR (object);
+
+ switch (prop_id)
+ {
+ case PROP_RATE_LIMIT:
+ g_file_monitor_set_rate_limit (monitor, g_value_get_int (value));
+ break;
+
+ case PROP_CONTEXT:
+ monitor->priv->context = g_value_dup_boxed (value);
+ if (monitor->priv->context == NULL)
+ monitor->priv->context = g_main_context_ref_thread_default ();
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+g_file_monitor_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GFileMonitor *monitor;
+ GFileMonitorPrivate *priv;
+
+ monitor = G_FILE_MONITOR (object);
+ priv = monitor->priv;
+
+ switch (prop_id)
+ {
+ case PROP_RATE_LIMIT:
+ g_value_set_int (value, priv->rate_limit_msec);
+ break;
+
+ case PROP_CANCELLED:
+ G_LOCK (cancelled);
+ g_value_set_boolean (value, priv->cancelled);
+ G_UNLOCK (cancelled);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
#define DEFAULT_RATE_LIMIT_MSECS 800
#define DEFAULT_VIRTUAL_CHANGES_DONE_DELAY_SECS 2
static guint signals[LAST_SIGNAL] = { 0 };
static void
+rate_limiter_free (RateLimiter *limiter)
+{
+ g_object_unref (limiter->file);
+ g_slice_free (RateLimiter, limiter);
+}
+
+static void
g_file_monitor_finalize (GObject *object)
{
GFileMonitor *monitor;
monitor = G_FILE_MONITOR (object);
- if (monitor->priv->last_sent_change_file)
- g_object_unref (monitor->priv->last_sent_change_file);
+ if (monitor->priv->timeout)
+ {
+ g_source_destroy (monitor->priv->timeout);
+ g_source_unref (monitor->priv->timeout);
+ }
- if (monitor->priv->send_delayed_change_timeout != 0)
- g_source_remove (monitor->priv->send_delayed_change_timeout);
+ g_hash_table_destroy (monitor->priv->rate_limiter);
- if (monitor->priv->virtual_changes_done_file)
- g_object_unref (monitor->priv->virtual_changes_done_file);
+ g_main_context_unref (monitor->priv->context);
+ g_mutex_clear (&monitor->priv->mutex);
- if (monitor->priv->virtual_changes_done_timeout)
- g_source_destroy (monitor->priv->virtual_changes_done_timeout);
-
- if (G_OBJECT_CLASS (g_file_monitor_parent_class)->finalize)
- (*G_OBJECT_CLASS (g_file_monitor_parent_class)->finalize) (object);
+ G_OBJECT_CLASS (g_file_monitor_parent_class)->finalize (object);
}
static void
g_file_monitor_dispose (GObject *object)
{
GFileMonitor *monitor;
+ GFileMonitorPrivate *priv;
monitor = G_FILE_MONITOR (object);
+ priv = monitor->priv;
+
+ if (priv->pending_file_change_source)
+ {
+ g_source_destroy (priv->pending_file_change_source);
+ g_source_unref (priv->pending_file_change_source);
+ priv->pending_file_change_source = NULL;
+ }
+ g_slist_free_full (priv->pending_file_changes, (GDestroyNotify) file_change_free);
+ priv->pending_file_changes = NULL;
/* Make sure we cancel on last unref */
- if (!monitor->priv->cancelled)
- g_file_monitor_cancel (monitor);
-
- if (G_OBJECT_CLASS (g_file_monitor_parent_class)->dispose)
- (*G_OBJECT_CLASS (g_file_monitor_parent_class)->dispose) (object);
+ g_file_monitor_cancel (monitor);
+
+ G_OBJECT_CLASS (g_file_monitor_parent_class)->dispose (object);
}
static void
g_file_monitor_class_init (GFileMonitorClass *klass)
{
- GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
-
- g_type_class_add_private (klass, sizeof (GFileMonitorPrivate));
-
- gobject_class->finalize = g_file_monitor_finalize;
- gobject_class->dispose = g_file_monitor_dispose;
-
+ GObjectClass *object_class;
+
+ object_class = G_OBJECT_CLASS (klass);
+ object_class->finalize = g_file_monitor_finalize;
+ object_class->dispose = g_file_monitor_dispose;
+ object_class->get_property = g_file_monitor_get_property;
+ object_class->set_property = g_file_monitor_set_property;
+
+ /**
+ * GFileMonitor::changed:
+ * @monitor: a #GFileMonitor.
+ * @file: a #GFile.
+ * @other_file: (allow-none): a #GFile or #NULL.
+ * @event_type: a #GFileMonitorEvent.
+ *
+ * Emitted when @file has been changed.
+ *
+ * If using #G_FILE_MONITOR_SEND_MOVED flag and @event_type is
+ * #G_FILE_MONITOR_EVENT_MOVED, @file will be set to a #GFile containing the
+ * old path, and @other_file will be set to a #GFile containing the new path.
+ *
+ * In all the other cases, @other_file will be set to #NULL.
+ **/
signals[CHANGED] =
g_signal_new (I_("changed"),
G_TYPE_FILE_MONITOR,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GFileMonitorClass, changed),
NULL, NULL,
- _gio_marshal_VOID__OBJECT_OBJECT_INT,
- G_TYPE_NONE,3,
- G_TYPE_FILE,
- G_TYPE_FILE,
- G_TYPE_INT);
+ NULL,
+ G_TYPE_NONE, 3,
+ G_TYPE_FILE, G_TYPE_FILE, G_TYPE_FILE_MONITOR_EVENT);
+
+ g_object_class_install_property (object_class,
+ PROP_RATE_LIMIT,
+ g_param_spec_int ("rate-limit",
+ P_("Rate limit"),
+ P_("The limit of the monitor to watch for changes, in milliseconds"),
+ 0, G_MAXINT,
+ DEFAULT_RATE_LIMIT_MSECS,
+ G_PARAM_READWRITE|
+ G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
+
+ g_object_class_install_property (object_class,
+ PROP_CANCELLED,
+ g_param_spec_boolean ("cancelled",
+ P_("Cancelled"),
+ P_("Whether the monitor has been cancelled"),
+ FALSE,
+ G_PARAM_READABLE|
+ G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
+
+ g_object_class_install_property (object_class,
+ PROP_CONTEXT,
+ g_param_spec_boxed ("context",
+ P_("Context"),
+ P_("The main context to dispatch from"),
+ G_TYPE_MAIN_CONTEXT, G_PARAM_WRITABLE |
+ G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
}
static void
g_file_monitor_init (GFileMonitor *monitor)
{
- monitor->priv = G_TYPE_INSTANCE_GET_PRIVATE (monitor,
- G_TYPE_FILE_MONITOR,
- GFileMonitorPrivate);
+ monitor->priv = g_file_monitor_get_instance_private (monitor);
monitor->priv->rate_limit_msec = DEFAULT_RATE_LIMIT_MSECS;
+ monitor->priv->rate_limiter = g_hash_table_new_full (g_file_hash, (GEqualFunc)g_file_equal,
+ NULL, (GDestroyNotify) rate_limiter_free);
+ g_mutex_init (&monitor->priv->mutex);
}
/**
* g_file_monitor_is_cancelled:
- * @monitor:
+ * @monitor: a #GFileMonitor
*
+ * Returns whether the monitor is canceled.
+ *
* Returns: %TRUE if monitor is canceled. %FALSE otherwise.
**/
gboolean
g_file_monitor_is_cancelled (GFileMonitor *monitor)
{
+ gboolean res;
+
g_return_val_if_fail (G_IS_FILE_MONITOR (monitor), FALSE);
- return monitor->priv->cancelled;
+ G_LOCK (cancelled);
+ res = monitor->priv->cancelled;
+ G_UNLOCK (cancelled);
+
+ return res;
}
/**
* g_file_monitor_cancel:
- * @monitor:
+ * @monitor: a #GFileMonitor.
+ *
+ * Cancels a file monitor.
*
* Returns: %TRUE if monitor was cancelled.
**/
g_return_val_if_fail (G_IS_FILE_MONITOR (monitor), FALSE);
+ G_LOCK (cancelled);
if (monitor->priv->cancelled)
- return TRUE;
+ {
+ G_UNLOCK (cancelled);
+ return TRUE;
+ }
monitor->priv->cancelled = TRUE;
+ G_UNLOCK (cancelled);
+ g_object_notify (G_OBJECT (monitor), "cancelled");
+
klass = G_FILE_MONITOR_GET_CLASS (monitor);
return (* klass->cancel) (monitor);
}
/**
* g_file_monitor_set_rate_limit:
* @monitor: a #GFileMonitor.
- * @limit_msecs: a integer with the limit in milliseconds to
- * poll for changes.
+ * @limit_msecs: a non-negative integer with the limit in milliseconds
+ * to poll for changes
*
- * Sets the rate limit to which the @monitor will poll for changes
- * on the device.
- *
- **/
+ * Sets the rate limit to which the @monitor will report
+ * consecutive change events to the same file.
+ */
void
g_file_monitor_set_rate_limit (GFileMonitor *monitor,
- int limit_msecs)
+ gint limit_msecs)
{
+ GFileMonitorPrivate *priv;
+
g_return_if_fail (G_IS_FILE_MONITOR (monitor));
+ g_return_if_fail (limit_msecs >= 0);
+
+ priv = monitor->priv;
+ if (priv->rate_limit_msec != limit_msecs)
+ {
+ monitor->priv->rate_limit_msec = limit_msecs;
+ g_object_notify (G_OBJECT (monitor), "rate-limit");
+ }
+}
+
+struct _FileChange {
+ GFile *child;
+ GFile *other_file;
+ GFileMonitorEvent event_type;
+};
+
+static void
+file_change_free (FileChange *change)
+{
+ g_object_unref (change->child);
+ if (change->other_file)
+ g_object_unref (change->other_file);
+
+ g_slice_free (FileChange, change);
+}
+
+static gboolean
+emit_cb (gpointer data)
+{
+ GFileMonitor *monitor = G_FILE_MONITOR (data);
+ GSList *pending, *iter;
+
+ g_mutex_lock (&monitor->priv->mutex);
+ pending = g_slist_reverse (monitor->priv->pending_file_changes);
+ monitor->priv->pending_file_changes = NULL;
+ if (monitor->priv->pending_file_change_source)
+ {
+ g_source_unref (monitor->priv->pending_file_change_source);
+ monitor->priv->pending_file_change_source = NULL;
+ }
+ g_mutex_unlock (&monitor->priv->mutex);
+
+ g_object_ref (monitor);
+ for (iter = pending; iter; iter = iter->next)
+ {
+ FileChange *change = iter->data;
+
+ g_signal_emit (monitor, signals[CHANGED], 0,
+ change->child, change->other_file, change->event_type);
+ file_change_free (change);
+ }
+ g_slist_free (pending);
+ g_object_unref (monitor);
+
+ return FALSE;
+}
+
+static void
+emit_in_idle (GFileMonitor *monitor,
+ GFile *child,
+ GFile *other_file,
+ GFileMonitorEvent event_type)
+{
+ GSource *source;
+ FileChange *change;
+ GFileMonitorPrivate *priv;
+
+ priv = monitor->priv;
+
+ change = g_slice_new (FileChange);
- monitor->priv->rate_limit_msec = limit_msecs;
+ change->child = g_object_ref (child);
+ if (other_file)
+ change->other_file = g_object_ref (other_file);
+ else
+ change->other_file = NULL;
+ change->event_type = event_type;
+
+ g_mutex_lock (&monitor->priv->mutex);
+ if (!priv->pending_file_change_source)
+ {
+ source = g_idle_source_new ();
+ priv->pending_file_change_source = source;
+ g_source_set_priority (source, 0);
+
+ /* We don't ref monitor here - instead dispose will free any
+ * pending idles.
+ */
+ g_source_set_callback (source, emit_cb, monitor, NULL);
+ g_source_set_name (source, "[gio] emit_cb");
+ g_source_attach (source, monitor->priv->context);
+ }
+ /* We reverse this in the processor */
+ priv->pending_file_changes = g_slist_prepend (priv->pending_file_changes, change);
+ g_mutex_unlock (&monitor->priv->mutex);
}
static guint32
get_time_msecs (void)
{
- return g_thread_gettime() / (1000 * 1000);
+ return g_get_monotonic_time () / G_TIME_SPAN_MILLISECOND;
}
static guint32
/* Change event rate limiting support: */
+static RateLimiter *
+new_limiter (GFileMonitor *monitor,
+ GFile *file)
+{
+ RateLimiter *limiter;
+
+ limiter = g_slice_new0 (RateLimiter);
+ limiter->file = g_object_ref (file);
+ g_hash_table_insert (monitor->priv->rate_limiter, file, limiter);
+
+ return limiter;
+}
+
static void
-update_last_sent_change (GFileMonitor *monitor, GFile *file, guint32 time_now)
+rate_limiter_send_virtual_changes_done_now (GFileMonitor *monitor,
+ RateLimiter *limiter)
{
- if (monitor->priv->last_sent_change_file != file)
+ if (limiter->send_virtual_changes_done_at != 0)
{
- if (monitor->priv->last_sent_change_file)
- {
- g_object_unref (monitor->priv->last_sent_change_file);
- monitor->priv->last_sent_change_file = NULL;
- }
- if (file)
- monitor->priv->last_sent_change_file = g_object_ref (file);
+ emit_in_idle (monitor, limiter->file, NULL,
+ G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT);
+ limiter->send_virtual_changes_done_at = 0;
}
-
- monitor->priv->last_sent_change_time = time_now;
}
static void
-send_delayed_change_now (GFileMonitor *monitor)
+rate_limiter_send_delayed_change_now (GFileMonitor *monitor,
+ RateLimiter *limiter,
+ guint32 time_now)
{
- if (monitor->priv->send_delayed_change_timeout)
+ if (limiter->send_delayed_change_at != 0)
{
- g_signal_emit (monitor, signals[CHANGED], 0,
- monitor->priv->last_sent_change_file, NULL,
- G_FILE_MONITOR_EVENT_CHANGED);
-
- g_source_remove (monitor->priv->send_delayed_change_timeout);
- monitor->priv->send_delayed_change_timeout = 0;
-
- /* Same file, new last_sent time */
- monitor->priv->last_sent_change_time = get_time_msecs ();
+ emit_in_idle (monitor,
+ limiter->file, NULL,
+ G_FILE_MONITOR_EVENT_CHANGED);
+ limiter->send_delayed_change_at = 0;
+ limiter->last_sent_change_time = time_now;
}
}
+typedef struct {
+ guint32 min_time;
+ guint32 time_now;
+ GFileMonitor *monitor;
+} ForEachData;
+
static gboolean
-delayed_changed_event_timeout (gpointer data)
+calc_min_time (GFileMonitor *monitor,
+ RateLimiter *limiter,
+ guint32 time_now,
+ guint32 *min_time)
{
- GFileMonitor *monitor = data;
+ gboolean delete_me;
+ guint32 expire_at;
- send_delayed_change_now (monitor);
-
- return FALSE;
-}
+ delete_me = TRUE;
-static void
-schedule_delayed_change (GFileMonitor *monitor, GFile *file, guint32 delay_msec)
-{
- if (monitor->priv->send_delayed_change_timeout == 0) /* Only set the timeout once */
+ if (limiter->last_sent_change_time != 0)
{
- monitor->priv->send_delayed_change_timeout =
- g_timeout_add (delay_msec, delayed_changed_event_timeout, monitor);
+ /* Set a timeout at 2*rate limit so that we can clear out the change from the hash eventually */
+ expire_at = limiter->last_sent_change_time + 2 * monitor->priv->rate_limit_msec;
+
+ if (time_difference (time_now, expire_at) > 0)
+ {
+ delete_me = FALSE;
+ *min_time = MIN (*min_time,
+ time_difference (time_now, expire_at));
+ }
}
-}
-static void
-cancel_delayed_change (GFileMonitor *monitor)
-{
- if (monitor->priv->send_delayed_change_timeout != 0)
+ if (limiter->send_delayed_change_at != 0)
{
- g_source_remove (monitor->priv->send_delayed_change_timeout);
- monitor->priv->send_delayed_change_timeout = 0;
+ delete_me = FALSE;
+ *min_time = MIN (*min_time,
+ time_difference (time_now, limiter->send_delayed_change_at));
}
-}
-/* Virtual changes_done_hint support: */
-
-static void
-send_virtual_changes_done_now (GFileMonitor *monitor)
-{
- if (monitor->priv->virtual_changes_done_timeout)
+ if (limiter->send_virtual_changes_done_at != 0)
{
- g_signal_emit (monitor, signals[CHANGED], 0,
- monitor->priv->virtual_changes_done_file, NULL,
- G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT);
-
- g_source_destroy (monitor->priv->virtual_changes_done_timeout);
- monitor->priv->virtual_changes_done_timeout = NULL;
-
- g_object_unref (monitor->priv->virtual_changes_done_file);
- monitor->priv->virtual_changes_done_file = NULL;
+ delete_me = FALSE;
+ *min_time = MIN (*min_time,
+ time_difference (time_now, limiter->send_virtual_changes_done_at));
}
+
+ return delete_me;
}
static gboolean
-virtual_changes_done_timeout (gpointer data)
+foreach_rate_limiter_fire (gpointer key,
+ gpointer value,
+ gpointer user_data)
{
- GFileMonitor *monitor = data;
+ RateLimiter *limiter = value;
+ ForEachData *data = user_data;
- send_virtual_changes_done_now (monitor);
+ if (limiter->send_delayed_change_at != 0 &&
+ time_difference (data->time_now, limiter->send_delayed_change_at) == 0)
+ rate_limiter_send_delayed_change_now (data->monitor, limiter, data->time_now);
- return FALSE;
+ if (limiter->send_virtual_changes_done_at != 0 &&
+ time_difference (data->time_now, limiter->send_virtual_changes_done_at) == 0)
+ rate_limiter_send_virtual_changes_done_now (data->monitor, limiter);
+
+ return calc_min_time (data->monitor, limiter, data->time_now, &data->min_time);
}
-static void
-schedule_virtual_change_done (GFileMonitor *monitor, GFile *file)
+static gboolean
+rate_limiter_timeout (gpointer timeout_data)
{
+ GFileMonitor *monitor = timeout_data;
+ ForEachData data;
GSource *source;
- source = g_timeout_source_new_seconds (DEFAULT_VIRTUAL_CHANGES_DONE_DELAY_SECS);
+ data.min_time = G_MAXUINT32;
+ data.monitor = monitor;
+ data.time_now = get_time_msecs ();
+ g_hash_table_foreach_remove (monitor->priv->rate_limiter,
+ foreach_rate_limiter_fire,
+ &data);
+
+ /* Remove old timeout */
+ if (monitor->priv->timeout)
+ {
+ g_source_destroy (monitor->priv->timeout);
+ g_source_unref (monitor->priv->timeout);
+ monitor->priv->timeout = NULL;
+ monitor->priv->timeout_fires_at = 0;
+ }
+
+ /* Set up new timeout */
+ if (data.min_time != G_MAXUINT32)
+ {
+ source = g_timeout_source_new (data.min_time + 1); /* + 1 to make sure we've really passed the time */
+ g_source_set_callback (source, rate_limiter_timeout, monitor, NULL);
+ g_source_attach (source, monitor->priv->context);
+
+ monitor->priv->timeout = source;
+ monitor->priv->timeout_fires_at = data.time_now + data.min_time;
+ }
- g_source_set_callback (source, virtual_changes_done_timeout, monitor, NULL);
- g_source_attach (source, NULL);
- monitor->priv->virtual_changes_done_timeout = source;
- monitor->priv->virtual_changes_done_file = g_object_ref (file);
- g_source_unref (source);
+ return FALSE;
+}
+
+static gboolean
+foreach_rate_limiter_update (gpointer key,
+ gpointer value,
+ gpointer user_data)
+{
+ RateLimiter *limiter = value;
+ ForEachData *data = user_data;
+
+ return calc_min_time (data->monitor, limiter, data->time_now, &data->min_time);
}
static void
-cancel_virtual_changes_done (GFileMonitor *monitor)
+update_rate_limiter_timeout (GFileMonitor *monitor,
+ guint new_time)
{
- if (monitor->priv->virtual_changes_done_timeout)
+ ForEachData data;
+ GSource *source;
+
+ if (monitor->priv->timeout_fires_at != 0 && new_time != 0 &&
+ time_difference (new_time, monitor->priv->timeout_fires_at) == 0)
+ return; /* Nothing to do, we already fire earlier than that */
+
+ data.min_time = G_MAXUINT32;
+ data.monitor = monitor;
+ data.time_now = get_time_msecs ();
+ g_hash_table_foreach_remove (monitor->priv->rate_limiter,
+ foreach_rate_limiter_update,
+ &data);
+
+ /* Remove old timeout */
+ if (monitor->priv->timeout)
+ {
+ g_source_destroy (monitor->priv->timeout);
+ g_source_unref (monitor->priv->timeout);
+ monitor->priv->timeout_fires_at = 0;
+ monitor->priv->timeout = NULL;
+ }
+
+ /* Set up new timeout */
+ if (data.min_time != G_MAXUINT32)
{
- g_source_destroy (monitor->priv->virtual_changes_done_timeout);
- monitor->priv->virtual_changes_done_timeout = NULL;
+ source = g_timeout_source_new (data.min_time + 1); /* + 1 to make sure we've really passed the time */
+ g_source_set_callback (source, rate_limiter_timeout, monitor, NULL);
+ g_source_attach (source, monitor->priv->context);
- g_object_unref (monitor->priv->virtual_changes_done_file);
- monitor->priv->virtual_changes_done_file = NULL;
+ monitor->priv->timeout = source;
+ monitor->priv->timeout_fires_at = data.time_now + data.min_time;
}
}
/**
* g_file_monitor_emit_event:
- * @monitor:
- * @file:
- * @other_file:
- * @event_type:
+ * @monitor: a #GFileMonitor.
+ * @child: a #GFile.
+ * @other_file: a #GFile.
+ * @event_type: a set of #GFileMonitorEvent flags.
*
+ * Emits the #GFileMonitor::changed signal if a change
+ * has taken place. Should be called from file monitor
+ * implementations only.
+ *
+ * The signal will be emitted from an idle handler (in the
+ * [thread-default main context][g-main-context-push-thread-default]).
**/
void
-g_file_monitor_emit_event (GFileMonitor *monitor,
- GFile *file,
- GFile *other_file,
- GFileMonitorEvent event_type)
+g_file_monitor_emit_event (GFileMonitor *monitor,
+ GFile *child,
+ GFile *other_file,
+ GFileMonitorEvent event_type)
{
guint32 time_now, since_last;
gboolean emit_now;
+ RateLimiter *limiter;
g_return_if_fail (G_IS_FILE_MONITOR (monitor));
- g_return_if_fail (G_IS_FILE (file));
+ g_return_if_fail (G_IS_FILE (child));
+
+ limiter = g_hash_table_lookup (monitor->priv->rate_limiter, child);
if (event_type != G_FILE_MONITOR_EVENT_CHANGED)
{
- send_delayed_change_now (monitor);
- update_last_sent_change (monitor, NULL, 0);
- if (event_type == G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT)
- cancel_virtual_changes_done (monitor);
- else
- send_virtual_changes_done_now (monitor);
- g_signal_emit (monitor, signals[CHANGED], 0, file, other_file, event_type);
+ if (limiter)
+ {
+ rate_limiter_send_delayed_change_now (monitor, limiter, get_time_msecs ());
+ if (event_type == G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT)
+ limiter->send_virtual_changes_done_at = 0;
+ else
+ rate_limiter_send_virtual_changes_done_now (monitor, limiter);
+ update_rate_limiter_timeout (monitor, 0);
+ }
+ emit_in_idle (monitor, child, other_file, event_type);
}
else
{
+ /* Changed event, rate limit */
time_now = get_time_msecs ();
emit_now = TRUE;
- if (monitor->priv->last_sent_change_file)
+ if (limiter)
{
- since_last = time_difference (monitor->priv->last_sent_change_time, time_now);
+ since_last = time_difference (limiter->last_sent_change_time, time_now);
if (since_last < monitor->priv->rate_limit_msec)
{
/* We ignore this change, but arm a timer so that we can fire it later if we
don't get any other events (that kill this timeout) */
emit_now = FALSE;
- schedule_delayed_change (monitor, file,
- monitor->priv->rate_limit_msec - since_last);
+ if (limiter->send_delayed_change_at == 0)
+ {
+ limiter->send_delayed_change_at = time_now + monitor->priv->rate_limit_msec;
+ update_rate_limiter_timeout (monitor, limiter->send_delayed_change_at);
+ }
}
}
+ if (limiter == NULL)
+ limiter = new_limiter (monitor, child);
+
if (emit_now)
{
- g_signal_emit (monitor, signals[CHANGED], 0, file, other_file, event_type);
+ emit_in_idle (monitor, child, other_file, event_type);
- cancel_delayed_change (monitor);
- update_last_sent_change (monitor, file, time_now);
+ limiter->last_sent_change_time = time_now;
+ limiter->send_delayed_change_at = 0;
+ /* Set a timeout of 2*rate limit so that we can clear out the change from the hash eventually */
+ update_rate_limiter_timeout (monitor, time_now + 2 * monitor->priv->rate_limit_msec);
}
-
+
/* Schedule a virtual change done. This is removed if we get a real one, and
postponed if we get more change events. */
- cancel_virtual_changes_done (monitor);
- schedule_virtual_change_done (monitor, file);
+
+ limiter->send_virtual_changes_done_at = time_now + DEFAULT_VIRTUAL_CHANGES_DONE_DELAY_SECS * 1000;
+ update_rate_limiter_timeout (monitor, limiter->send_virtual_changes_done_at);
}
}
projects / platform / upstream / glib.git / blobdiff