[tracker-miners/wip/carlosg/shuffle-libtracker-miner: 104/116] libtracker-miner: Dispose cached events on MONITOR_EVENT_DELETED

[Carlos Garnacho <carlosg src gnome org>]

commit 4203a26a604f1fa1442d5d65c7826701544f9cfd
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Mar 4 13:28:12 2019 +0100

    libtracker-miner: Dispose cached events on MONITOR_EVENT_DELETED
    
    I don't know if this is possible, but in case that happens we should
    drop the event either way, and neutralize CREATED+DELETED events early
    on.

 src/libtracker-miner/tracker-monitor.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)
---
diff --git a/src/libtracker-miner/tracker-monitor.c b/src/libtracker-miner/tracker-monitor.c
index 342caaaa6..e4276dbb4 100644
--- a/src/libtracker-miner/tracker-monitor.c
+++ b/src/libtracker-miner/tracker-monitor.c
@@ -659,6 +659,7 @@ monitor_event_cb (GFileMonitor      *file_monitor,
        gchar *other_file_uri;
        gboolean is_directory = FALSE;
        TrackerMonitorPrivate *priv;
+       gpointer value;
 
        monitor = user_data;
        priv = tracker_monitor_get_instance_private (monitor);
@@ -707,6 +708,18 @@ monitor_event_cb (GFileMonitor      *file_monitor,
                }
                break;
        case G_FILE_MONITOR_EVENT_DELETED:
+               if (g_hash_table_lookup_extended (priv->cached_events,
+                                                 file, NULL, &value) &&
+                   GPOINTER_TO_UINT (value) == G_FILE_MONITOR_EVENT_CREATED) {
+                       /* Consume both the cached CREATED event and this one */
+                       g_hash_table_remove (priv->cached_events, file);
+                       break;
+               }
+
+               /* In any case, cached events are stale */
+               g_hash_table_remove (priv->cached_events, file);
+
+               /* Fall through */
        case G_FILE_MONITOR_EVENT_ATTRIBUTE_CHANGED:
                emit_signal_for_event (monitor, event_type,
                                       is_directory, file, NULL);