// Copyright (c) 2011 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 BASE_PROFILER_SCOPED_PROFILE_H_ #define BASE_PROFILER_SCOPED_PROFILE_H_ //------------------------------------------------------------------------------ // ScopedProfile provides basic helper functions for profiling a short // region of code within a scope. It is separate from the related ThreadData // class so that it can be included without much other cruft, and provide the // macros listed below. #include "base/base_export.h" #include "base/location.h" #include "base/profiler/tracked_time.h" #include "base/tracked_objects.h" #define PASTE_LINE_NUMBER_ON_NAME(name, line) name##line #define LINE_BASED_VARIABLE_NAME_FOR_PROFILING \ PASTE_LINE_NUMBER_ON_NAME(some_profiler_variable_, __LINE__) // Defines the containing scope as a profiled region. This allows developers to // profile their code and see results on their about:profiler page, as well as // on the UMA dashboard. #define TRACK_RUN_IN_THIS_SCOPED_REGION(dispatch_function_name) \ ::tracked_objects::ScopedProfile LINE_BASED_VARIABLE_NAME_FOR_PROFILING( \ FROM_HERE_WITH_EXPLICIT_FUNCTION(#dispatch_function_name)) namespace tracked_objects { class Births; class BASE_EXPORT ScopedProfile { public: explicit ScopedProfile(const Location& location); ~ScopedProfile(); // Stop tracing prior to the end destruction of the instance. void StopClockAndTally(); private: Births* birth_; // Place in code where tracking started. TaskStopwatch stopwatch_; DISALLOW_COPY_AND_ASSIGN(ScopedProfile); }; } // namespace tracked_objects #endif // BASE_PROFILER_SCOPED_PROFILE_H_