Add convenience method for craeting a Cursor if tracelevel is high enough.

2 files changed, 6 insertions, 0 deletions

diff --git a/searchlib/src/vespa/searchlib/engine/trace.cpp b/searchlib/src/vespa/searchlib/engine/trace.cpp
index 14863bb0aea..ba92902d2fd 100644
--- a/searchlib/src/vespa/searchlib/engine/trace.cpp
+++ b/searchlib/src/vespa/searchlib/engine/trace.cpp
@@ -39,6 +39,11 @@ Trace::createCursor(vespalib::stringref name) {
     return trace;
 }
 
+Trace::Cursor *
+Trace::maybeCreateCursor(uint32_t level, vespalib::stringref name) {
+    return shouldTrace(level) ? & createCursor(name) : nullptr;
+}
+
 void
 Trace::addEvent(uint32_t level, vespalib::stringref event) {
     if (!shouldTrace(level)) { return; }
diff --git a/searchlib/src/vespa/searchlib/engine/trace.h b/searchlib/src/vespa/searchlib/engine/trace.h
index 32810daa01c..41f2c608615 100644
--- a/searchlib/src/vespa/searchlib/engine/trace.h
+++ b/searchlib/src/vespa/searchlib/engine/trace.h
@@ -62,6 +62,7 @@ public:
      * @return a Cursor to use for further tracing.
      */
     Cursor & createCursor(vespalib::stringref name);
+    Cursor * maybeCreateCursor(uint32_t level, vespalib::stringref name);
     /**
      * Will add a simple 'event' string. It will also add a timestamp relative to the creation of the trace.
      * @param level require for actually add the trace.