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// Copyright 2024 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_SCENARIOS_LOADING_SCENARIO_DATA_H_
#define COMPONENTS_PERFORMANCE_MANAGER_SCENARIOS_LOADING_SCENARIO_DATA_H_
#include <map>
#include <vector>
#include "components/performance_manager/graph/node_inline_data.h"
namespace performance_manager {
class ProcessNode;
// Counts of pages in each loading state. Per-process loading counts are stored
// inline in ProcessNode; global counts are stored in LoadingScenarioObserver.
class LoadingScenarioCounts : public NodeInlineData<LoadingScenarioCounts> {
public:
LoadingScenarioCounts() = default;
~LoadingScenarioCounts() = default;
// Move-only.
LoadingScenarioCounts(const LoadingScenarioCounts&) = delete;
LoadingScenarioCounts& operator=(const LoadingScenarioCounts&) = delete;
LoadingScenarioCounts(LoadingScenarioCounts&&) = default;
LoadingScenarioCounts& operator=(LoadingScenarioCounts&&) = default;
// Focused pages that are loading.
size_t focused_loading_pages() const { return focused_loading_pages_; }
// Visible pages (including focused) that are loading.
size_t visible_loading_pages() const { return visible_loading_pages_; }
// All pages (including focused and visible) that are loading.
size_t loading_pages() const { return loading_pages_; }
void IncrementLoadingPageCounts(bool visible, bool focused);
void DecrementLoadingPageCounts(bool visible, bool focused);
private:
size_t focused_loading_pages_ = 0;
size_t visible_loading_pages_ = 0;
size_t loading_pages_ = 0;
};
// A cache of the number of frames hosted in each process in a page. Used to
// detect when the last frame in a given process is removed from the page.
// Stored inline in PageNode.
class LoadingScenarioPageFrameCounts
: public NodeInlineData<LoadingScenarioPageFrameCounts> {
public:
LoadingScenarioPageFrameCounts();
~LoadingScenarioPageFrameCounts();
// Move-only.
LoadingScenarioPageFrameCounts(const LoadingScenarioPageFrameCounts&) =
delete;
LoadingScenarioPageFrameCounts& operator=(
const LoadingScenarioPageFrameCounts&) = delete;
LoadingScenarioPageFrameCounts(LoadingScenarioPageFrameCounts&&);
LoadingScenarioPageFrameCounts& operator=(LoadingScenarioPageFrameCounts&&);
// Increments the number of frames in this page hosted in `process_node`, and
// returns the new value.
size_t IncrementFrameCountForProcess(const ProcessNode* process_node);
// Decrements the number of frames in this page hosted in `process_node`, and
// returns the new value.
size_t DecrementFrameCountForProcess(const ProcessNode* process_node);
// Returns `true` iff any frame in this page is hosted in `process_node`.
bool ProcessHasFramesInPage(const ProcessNode* process_node) const;
// Returns all processes hosting at least one frame in this page.
std::vector<const ProcessNode*> GetProcessesWithFramesInPage() const;
private:
std::map<const ProcessNode*, size_t> process_frame_counts_;
};
} // namespace performance_manager
#endif // COMPONENTS_PERFORMANCE_MANAGER_SCENARIOS_LOADING_SCENARIO_DATA_H_
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