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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_PERFORMANCE_MANAGER_RESOURCE_ATTRIBUTION_MEMORY_MEASUREMENT_PROVIDER_H_
#define COMPONENTS_PERFORMANCE_MANAGER_RESOURCE_ATTRIBUTION_MEMORY_MEASUREMENT_PROVIDER_H_
#include <map>
#include <memory>
#include "base/functional/callback_forward.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "base/values.h"
#include "components/performance_manager/public/graph/node_data_describer.h"
#include "components/performance_manager/public/resource_attribution/memory_measurement_delegate.h"
#include "components/performance_manager/public/resource_attribution/query_results.h"
#include "components/performance_manager/public/resource_attribution/resource_contexts.h"
#include "components/performance_manager/resource_attribution/performance_manager_aliases.h"
namespace resource_attribution {
class MemoryMeasurementProvider
: public performance_manager::NodeDataDescriberDefaultImpl {
public:
explicit MemoryMeasurementProvider(Graph* graph);
~MemoryMeasurementProvider() override;
MemoryMeasurementProvider(const MemoryMeasurementProvider& other) = delete;
MemoryMeasurementProvider& operator=(const MemoryMeasurementProvider&) =
delete;
// The given `factory` will be used to create a MemoryMeasurementDelegate for
// ProcessNodes to be measured.
void SetDelegateFactoryForTesting(
MemoryMeasurementDelegate::Factory* factory);
// Results of a memory summary query. Each QueryResults object will contain a
// MemorySummaryResult.
using ResultCallback = base::OnceCallback<void(QueryResultMap)>;
// Requests memory summaries for all processes. `callback` will be invoked
// with the results.
void RequestMemorySummary(ResultCallback callback);
// NodeDataDescriber:
base::Value::Dict DescribeFrameNodeData(const FrameNode* node) const override;
base::Value::Dict DescribePageNodeData(const PageNode* node) const override;
base::Value::Dict DescribeProcessNodeData(
const ProcessNode* node) const override;
base::Value::Dict DescribeWorkerNodeData(
const WorkerNode* node) const override;
private:
void OnMemorySummary(
ResultCallback callback,
MemoryMeasurementDelegate::MemorySummaryMap process_summaries);
// Returns description of the most recent measurement of `context` for
// NodeDataDescriber, or an empty dict if there is none.
base::Value::Dict DescribeContextData(const ResourceContext& context) const;
SEQUENCE_CHECKER(sequence_checker_);
// Delegate that measures memory usage of ProcessNodes.
std::unique_ptr<MemoryMeasurementDelegate> measurement_delegate_
GUARDED_BY_CONTEXT(sequence_checker_);
raw_ptr<Graph> graph_ GUARDED_BY_CONTEXT(sequence_checker_) = nullptr;
// The last measurement, cached for the node data describers.
// TODO(crbug.com/325328567): Use a central cache for all Resource Attribution
// measurements.
QueryResultMap cached_results_ GUARDED_BY_CONTEXT(sequence_checker_);
base::WeakPtrFactory<MemoryMeasurementProvider> weak_factory_{this};
};
} // namespace resource_attribution
#endif // COMPONENTS_PERFORMANCE_MANAGER_RESOURCE_ATTRIBUTION_MEMORY_MEASUREMENT_PROVIDER_H_
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