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GFileMonitorSource: return "interesting" value

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Return an "interesting" boolean from the event handler function on
GFileMonitorSource.

An event was "interesting" if it will result in a signal actually being
dispatched to the user.  It is "uninteresting" if it only hit an
already-dirty rate limiter.

We will use this information to do some backing off in the backends when
faced with a flood of uninteresting events.
This commit is contained in:
Ryan Lortie 2015-01-15 15:39:43 -05:00
parent 3d2d4b8efe
commit 9adf948a2b
2 changed files with 24 additions and 13 deletions
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35
gio/glocalfilemonitor.c
View File

@ -177,7 +177,7 @@ g_file_monitor_source_add_pending_change (GFileMonitorSource *fms,
g_hash_table_insert (fms->pending_changes_table, change->child, iter);
}
static void
static gboolean
g_file_monitor_source_set_pending_change_dirty (GFileMonitorSource *fms,
GSequenceIter *iter)
{
@ -185,12 +185,15 @@ g_file_monitor_source_set_pending_change_dirty (GFileMonitorSource *fms,
change = g_sequence_get (iter);
if (!change->dirty)
{
change->dirty = TRUE;
/* if it was already dirty then this change is 'uninteresting' */
if (change->dirty)
return FALSE;
g_sequence_sort_changed (iter, pending_change_compare_ready_time, fms);
}
change->dirty = TRUE;
g_sequence_sort_changed (iter, pending_change_compare_ready_time, fms);
return TRUE;
}
static gboolean
@ -239,12 +242,13 @@ g_file_monitor_source_queue_event (GFileMonitorSource *fms,
g_queue_push_tail (&fms->event_queue, event);
}
static void
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);
@ -255,11 +259,14 @@ g_file_monitor_source_file_changed (GFileMonitorSource *fms,
{
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
g_file_monitor_source_set_pending_change_dirty (fms, pending);
interesting = g_file_monitor_source_set_pending_change_dirty (fms, pending);
g_file_monitor_source_update_ready_time (fms);
return interesting;
}
static void
@ -324,7 +331,7 @@ is_basename (const gchar *name)
return !strchr (name, '/');
}
void
gboolean
g_file_monitor_source_handle_event (GFileMonitorSource *fms,
GFileMonitorEvent event_type,
const gchar *child,
@ -332,11 +339,13 @@ g_file_monitor_source_handle_event (GFileMonitorSource *fms,
GFile *other,
gint64 event_time)
{
gboolean interesting = TRUE;
g_assert (!child || is_basename (child));
g_assert (!rename_to || is_basename (rename_to));
if (fms->basename && (!child || !g_str_equal (child, fms->basename)))
return;
return TRUE;
g_mutex_lock (&fms->lock);
@ -344,7 +353,7 @@ g_file_monitor_source_handle_event (GFileMonitorSource *fms,
if (!fms->instance)
{
g_mutex_unlock (&fms->lock);
return;
return TRUE;
}
switch (event_type)
@ -356,7 +365,7 @@ g_file_monitor_source_handle_event (GFileMonitorSource *fms,
case G_FILE_MONITOR_EVENT_CHANGED:
g_assert (!other && !rename_to);
g_file_monitor_source_file_changed (fms, child, event_time);
interesting = g_file_monitor_source_file_changed (fms, child, event_time);
break;
case G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT:
@ -426,6 +435,8 @@ g_file_monitor_source_handle_event (GFileMonitorSource *fms,
g_file_monitor_source_update_ready_time (fms);
g_mutex_unlock (&fms->lock);
return interesting;
}
static gint64

2
gio/glocalfilemonitor.h
View File

@ -91,7 +91,7 @@ g_local_file_monitor_new_in_worker (const gchar *pathname,
/* for implementations of GLocalFileMonitor */
GLIB_AVAILABLE_IN_2_44
void
gboolean
g_file_monitor_source_handle_event (GFileMonitorSource *fms,
GFileMonitorEvent event_type,
const gchar *child,