Only expose sync for the master thread.

2 files changed, 5 insertions, 2 deletions

diff --git a/searchcorespi/src/vespa/searchcorespi/index/i_thread_service.h b/searchcorespi/src/vespa/searchcorespi/index/i_thread_service.h
index b4e51e2dd1b..f973908b62d 100644
--- a/searchcorespi/src/vespa/searchcorespi/index/i_thread_service.h
+++ b/searchcorespi/src/vespa/searchcorespi/index/i_thread_service.h
@@ -9,7 +9,7 @@ namespace searchcorespi::index {
 /**
  * Interface for a single thread used for write tasks.
  */
-struct IThreadService : public vespalib::SyncableThreadExecutor
+struct IThreadService : public vespalib::ThreadExecutor
 {
     IThreadService(const IThreadService &) = delete;
     IThreadService & operator = (const IThreadService &) = delete;
@@ -25,6 +25,9 @@ struct IThreadService : public vespalib::SyncableThreadExecutor
      * Returns whether the current thread is the underlying thread.
      */
     virtual bool isCurrentThread() const = 0;
+};
+
+struct ISyncableThreadService : public IThreadService, vespalib::Syncable {
 
 };
 
diff --git a/searchcorespi/src/vespa/searchcorespi/index/ithreadingservice.h b/searchcorespi/src/vespa/searchcorespi/index/ithreadingservice.h
index 72362688659..c95a42f601b 100644
--- a/searchcorespi/src/vespa/searchcorespi/index/ithreadingservice.h
+++ b/searchcorespi/src/vespa/searchcorespi/index/ithreadingservice.h
@@ -69,7 +69,7 @@ struct IThreadingService
      */
     virtual void blocking_master_execute(vespalib::Executor::Task::UP task) = 0;
 
-    virtual IThreadService &master() = 0;
+    virtual ISyncableThreadService &master() = 0;
     virtual IThreadService &index() = 0;
     virtual vespalib::ThreadExecutor &summary() = 0;
     virtual vespalib::ThreadExecutor &shared() = 0;