[gnome-builder] vala-pack: add helper to run command while context is locked

[Christian Hergert <chergert src gnome org>]

commit 9e1374ace54f9ff7370e3bc1bac344a2c7d5ac1c
Author: Christian Hergert <chergert redhat com>
Date:   Fri Nov 10 18:39:56 2017 -0800

    vala-pack: add helper to run command while context is locked

 src/plugins/vala-pack/ide-vala-index.vala |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/src/plugins/vala-pack/ide-vala-index.vala b/src/plugins/vala-pack/ide-vala-index.vala
index c0bccd6..474b7ca 100644
--- a/src/plugins/vala-pack/ide-vala-index.vala
+++ b/src/plugins/vala-pack/ide-vala-index.vala
@@ -542,6 +542,13 @@ namespace Ide
 
                        return null;
                }
+
+               public void do_locked (GLib.Func func)
+               {
+                       lock (this.code_context) {
+                               func (this);
+                       }
+               }
        }
 }