| // Copyright 2018 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SERVICES_AUDIO_TRACED_SERVICE_REF_H_ |
| #define SERVICES_AUDIO_TRACED_SERVICE_REF_H_ |
| |
| #include <memory> |
| |
| #include "base/macros.h" |
| |
| namespace service_manager { |
| class ServiceKeepaliveRef; |
| } |
| |
| namespace audio { |
| |
| // Wraps a service_manager::ServiceKeepaliveRef, and provides tracing |
| // information. |
| class TracedServiceRef final { |
| public: |
| TracedServiceRef(); |
| // |trace_name| must have static lifetime since it is used in trace macros. |
| // By convention, "audio::InterfaceName Binding" is used, e.g. |
| // "audio::StreamFactory Binding". |
| TracedServiceRef( |
| std::unique_ptr<service_manager::ServiceKeepaliveRef> keepalive_ref, |
| const char* trace_name); |
| TracedServiceRef(TracedServiceRef&& other); |
| TracedServiceRef& operator=(TracedServiceRef&& other); |
| |
| ~TracedServiceRef(); |
| |
| // This id can be used to add TRACE_EVENT_NESTABLE_ASYNC traces to the scope |
| // of the TracedServiceRef. |
| const void* id_for_trace() const { return keepalive_ref_.get(); } |
| |
| private: |
| std::unique_ptr<service_manager::ServiceKeepaliveRef> keepalive_ref_; |
| const char* trace_name_; |
| |
| DISALLOW_COPY_AND_ASSIGN(TracedServiceRef); |
| }; |
| |
| } // namespace audio |
| |
| #endif // SERVICES_AUDIO_TRACED_SERVICE_REF_H_ |