[tracker] libtracker-data: Add ENABLE_MUTEXES TrackerDBManager initialization flag

[Carlos Garnacho <carlosg src gnome org>]

commit 8868839eef189f2fd0388c1ddac24b0039f3d773
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sat Nov 5 20:35:09 2016 +0100

    libtracker-data: Add ENABLE_MUTEXES TrackerDBManager initialization flag

 src/libtracker-data/tracker-db-interface-sqlite.c |    5 ++---
 src/libtracker-data/tracker-db-manager.h          |    3 ++-
 src/libtracker-direct/tracker-direct.vala         |    2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/src/libtracker-data/tracker-db-interface-sqlite.c 
b/src/libtracker-data/tracker-db-interface-sqlite.c
index 62fcea5..083a15e 100644
--- a/src/libtracker-data/tracker-db-interface-sqlite.c
+++ b/src/libtracker-data/tracker-db-interface-sqlite.c
@@ -2520,9 +2520,8 @@ tracker_db_cursor_sqlite_new (TrackerDBStatement  *ref_stmt,
 
        cursor->finished = FALSE;
 
-       /* used for direct access as libtracker-sparql is thread-safe and
-          uses a single shared connection with SQLite mutex disabled */
-       cursor->threadsafe = threadsafe;
+       cursor->threadsafe = (tracker_db_manager_get_flags (NULL, NULL) &
+                             TRACKER_DB_MANAGER_ENABLE_MUTEXES) != 0;
 
        cursor->stmt = ref_stmt->stmt;
        ref_stmt->stmt_is_used = TRUE;
diff --git a/src/libtracker-data/tracker-db-manager.h b/src/libtracker-data/tracker-db-manager.h
index 396a13a..de0a48e 100644
--- a/src/libtracker-data/tracker-db-manager.h
+++ b/src/libtracker-data/tracker-db-manager.h
@@ -47,7 +47,8 @@ typedef enum {
        /* 1 << 3 Was low mem mode */
        TRACKER_DB_MANAGER_REMOVE_ALL            = 1 << 4,
        TRACKER_DB_MANAGER_READONLY              = 1 << 5,
-       TRACKER_DB_MANAGER_DO_NOT_CHECK_ONTOLOGY = 1 << 6
+       TRACKER_DB_MANAGER_DO_NOT_CHECK_ONTOLOGY = 1 << 6,
+       TRACKER_DB_MANAGER_ENABLE_MUTEXES        = 1 << 7,
 } TrackerDBManagerFlags;
 
 GType               tracker_db_get_type                       (void) G_GNUC_CONST;
diff --git a/src/libtracker-direct/tracker-direct.vala b/src/libtracker-direct/tracker-direct.vala
index a4f0d87..51499f3 100644
--- a/src/libtracker-direct/tracker-direct.vala
+++ b/src/libtracker-direct/tracker-direct.vala
@@ -36,7 +36,7 @@ public class Tracker.Direct.Connection : Tracker.Sparql.Connection {
                                        select_cache_size = int.parse (env_cache_size);
                                }
 
-                               Data.Manager.init (DBManagerFlags.READONLY, null, null, false, false, 
select_cache_size, 0, null, null);
+                               Data.Manager.init (DBManagerFlags.READONLY | DBManagerFlags.ENABLE_MUTEXES, 
null, null, false, false, select_cache_size, 0, null, null);
                        }
 
                        use_count++;