1 // Copyright 2019 Google LLC 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #include "fcp/tracing/tracing_span_ref.h" 16 17 #include "fcp/tracing/tracing_recorder_impl.h" 18 #include "fcp/tracing/tracing_span_impl.h" 19 20 namespace fcp { 21 Top()22TracingSpanRef fcp::TracingSpanRef::Top() { 23 tracing_internal::TracingSpanImpl* top = 24 tracing_internal::TracingSpanImpl::Top(); 25 return top ? top->Ref() 26 : tracing_internal::TracingRecorderImpl::GetCurrent() 27 ->GetRootSpan() 28 ->Ref(); 29 } 30 } // namespace fcp 31