Add shutdown to thread interface.

Let the optimize config control index and summary executor too.

2 files changed, 2 insertions, 1 deletions

diff --git a/vespalib/src/vespa/vespalib/util/threadexecutor.h b/vespalib/src/vespa/vespalib/util/threadexecutor.h
index 202e516bc60..61a5d9d5ac7 100644
--- a/vespalib/src/vespa/vespalib/util/threadexecutor.h
+++ b/vespalib/src/vespa/vespalib/util/threadexecutor.h
@@ -40,6 +40,7 @@ public:
 class SyncableThreadExecutor : public ThreadExecutor, public Syncable
 {
 public:
+    virtual SyncableThreadExecutor & shutdown() = 0;
 };
 
 } // namespace vespalib
diff --git a/vespalib/src/vespa/vespalib/util/threadstackexecutorbase.h b/vespalib/src/vespa/vespalib/util/threadstackexecutorbase.h
index 2c0bc56d6df..6333a8fc66e 100644
--- a/vespalib/src/vespa/vespalib/util/threadstackexecutorbase.h
+++ b/vespalib/src/vespa/vespalib/util/threadstackexecutorbase.h
@@ -226,7 +226,7 @@ public:
      *
      * @return this object; for chaining
      **/
-    ThreadStackExecutorBase &shutdown();
+    ThreadStackExecutorBase &shutdown() override;
 
     /**
      * Will invoke shutdown then sync.