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// 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/macros.h"
#include "base/profiler/tracked_time.h"
#include "base/trace_event/heap_profiler.h"
#include "base/tracked_objects.h"
// Two level indirection is required for correct macro substitution.
#define PASTE_COUNTER_ON_NAME2(name, counter) name##counter
#define PASTE_COUNTER_ON_NAME(name, counter) \
PASTE_COUNTER_ON_NAME2(name, counter)
#define COUNTER_BASED_VARIABLE_NAME_FOR_PROFILING \
PASTE_COUNTER_ON_NAME(some_profiler_variable_, __COUNTER__)
// 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 and heap profiler.
#define TRACK_RUN_IN_THIS_SCOPED_REGION(dispatch_function_name) \
const ::tracked_objects::Location& location = \
FROM_HERE_WITH_EXPLICIT_FUNCTION(#dispatch_function_name); \
TRACE_HEAP_PROFILER_API_SCOPED_TASK_EXECUTION \
COUNTER_BASED_VARIABLE_NAME_FOR_PROFILING(location.file_name()); \
::tracked_objects::ScopedProfile COUNTER_BASED_VARIABLE_NAME_FOR_PROFILING( \
location, ::tracked_objects::ScopedProfile::ENABLED)
// Same as TRACK_RUN_IN_THIS_SCOPED_REGION except that there's an extra param
// which is concatenated with the function name for better filtering.
#define TRACK_SCOPED_REGION(category_name, dispatch_function_name) \
const ::tracked_objects::Location& location = \
FROM_HERE_WITH_EXPLICIT_FUNCTION("[" category_name \
"]" dispatch_function_name); \
TRACE_HEAP_PROFILER_API_SCOPED_TASK_EXECUTION \
COUNTER_BASED_VARIABLE_NAME_FOR_PROFILING(location.file_name()); \
::tracked_objects::ScopedProfile COUNTER_BASED_VARIABLE_NAME_FOR_PROFILING( \
location, ::tracked_objects::ScopedProfile::ENABLED)
namespace tracked_objects {
class Births;
class BASE_EXPORT ScopedProfile {
public:
// Mode of operation. Specifies whether ScopedProfile should be a no-op or
// needs to create and tally a task.
enum Mode {
DISABLED, // Do nothing.
ENABLED // Create and tally a task.
};
ScopedProfile(const Location& location, Mode mode);
~ScopedProfile();
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_
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