[tracker/wip/carlosg/domain-ontologies: 48/116] libtracker-data: Add API to attach user data to TrackerDBInterfaces

[Carlos Garnacho <carlosg src gnome org>]

commit b2da37e87c84394362666bcd6bcf0303704b5265
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Jun 9 23:23:42 2017 +0200

    libtracker-data: Add API to attach user data to TrackerDBInterfaces
    
    This will be used to attach the data manager.

 src/libtracker-data/tracker-db-interface-sqlite.c |   26 +++++++++++++++++++++
 src/libtracker-data/tracker-db-interface.h        |    6 +++++
 2 files changed, 32 insertions(+), 0 deletions(-)
---
diff --git a/src/libtracker-data/tracker-db-interface-sqlite.c 
b/src/libtracker-data/tracker-db-interface-sqlite.c
index fd2c0d4..ff5298e 100644
--- a/src/libtracker-data/tracker-db-interface-sqlite.c
+++ b/src/libtracker-data/tracker-db-interface-sqlite.c
@@ -101,6 +101,10 @@ struct TrackerDBInterface {
 
        /* Wal */
        TrackerDBWalCallback wal_hook;
+
+       /* User data */
+       gpointer user_data;
+       GDestroyNotify user_data_destroy_notify;
 };
 
 struct TrackerDBInterfaceClass {
@@ -1910,6 +1914,9 @@ tracker_db_interface_sqlite_finalize (GObject *object)
        g_free (db_interface->filename);
        g_free (db_interface->busy_status);
 
+       if (db_interface->user_data && db_interface->user_data_destroy_notify)
+               db_interface->user_data_destroy_notify (db_interface->user_data);
+
        G_OBJECT_CLASS (tracker_db_interface_parent_class)->finalize (object);
 }
 
@@ -2947,3 +2954,22 @@ tracker_db_statement_sqlite_reset (TrackerDBStatement *stmt)
        sqlite3_reset (stmt->stmt);
        sqlite3_clear_bindings (stmt->stmt);
 }
+
+
+void
+tracker_db_interface_set_user_data (TrackerDBInterface *db_interface,
+                                    gpointer            user_data,
+                                    GDestroyNotify      destroy_notify)
+{
+       if (db_interface->user_data && db_interface->user_data_destroy_notify)
+               db_interface->user_data_destroy_notify (db_interface->user_data);
+
+       db_interface->user_data = user_data;
+       db_interface->user_data_destroy_notify = destroy_notify;
+}
+
+gpointer
+tracker_db_interface_get_user_data (TrackerDBInterface *db_interface)
+{
+       return db_interface->user_data;
+}
diff --git a/src/libtracker-data/tracker-db-interface.h b/src/libtracker-data/tracker-db-interface.h
index 0422f2b..16041cc 100644
--- a/src/libtracker-data/tracker-db-interface.h
+++ b/src/libtracker-data/tracker-db-interface.h
@@ -91,6 +91,12 @@ void                    tracker_db_interface_set_max_stmt_cache_size (TrackerDBI
                                                                       TrackerDBStatementCacheType cache_type,
                                                                       guint                       max_size);
 
+/* User data functions, mainly to attach the data manager */
+void                    tracker_db_interface_set_user_data           (TrackerDBInterface         *interface,
+                                                                      gpointer                    user_data,
+                                                                     GDestroyNotify              
destroy_notify);
+gpointer                tracker_db_interface_get_user_data           (TrackerDBInterface         *interface);
+
 /* Functions to create queries/procedures */
 TrackerDBStatement *    tracker_db_interface_create_statement        (TrackerDBInterface          *interface,
                                                                       TrackerDBStatementCacheType  
cache_type,