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// Copyright 2019 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_RENDER_PROCESS_USER_DATA_H_
#define COMPONENTS_PERFORMANCE_MANAGER_RENDER_PROCESS_USER_DATA_H_
#include <memory>
#include "base/memory/raw_ptr.h"
#include "base/supports_user_data.h"
#include "content/public/browser/render_process_host_observer.h"
namespace content {
class RenderProcessHost;
} // namespace content
namespace performance_manager {
class ProcessNodeImpl;
// Attached to RenderProcessHost as user data, associates the RenderProcessHost
// with the Resource Coordinator process node.
class RenderProcessUserData : public base::SupportsUserData::Data,
public content::RenderProcessHostObserver {
public:
// Observer interface to be notified when a RenderProcessUserData is
// destroyed.
class DestructionObserver {
public:
virtual ~DestructionObserver() = default;
virtual void OnRenderProcessUserDataDestroying(
content::RenderProcessHost*) = 0;
};
RenderProcessUserData(const RenderProcessUserData&) = delete;
RenderProcessUserData& operator=(const RenderProcessUserData&) = delete;
~RenderProcessUserData() override;
static const void* UserDataKey();
static RenderProcessUserData* GetForRenderProcessHost(
content::RenderProcessHost* host);
// Registers an observer that is notified when the RenderProcessUserData is
// destroyed. Can only be set to non-nullptr if it was previously nullptr, and
// vice-versa.
void SetDestructionObserver(DestructionObserver* destruction_observer);
// Invoked when a process is launched for this RenderProcessHost
// (immediately after RenderProcessHost::GetProcess() becomes valid).
void OnProcessLaunched();
ProcessNodeImpl* process_node() { return process_node_.get(); }
private:
friend class PerformanceManagerRegistryImpl;
explicit RenderProcessUserData(
content::RenderProcessHost* render_process_host);
// Only PerformanceManagerRegistry is allowed to create a
// RenderProcessUserData.
static RenderProcessUserData* CreateForRenderProcessHost(
content::RenderProcessHost* host);
// RenderProcessHostObserver overrides
void RenderProcessExited(
content::RenderProcessHost* host,
const content::ChildProcessTerminationInfo& info) override;
void RenderProcessHostDestroyed(content::RenderProcessHost* host) override;
const raw_ptr<content::RenderProcessHost> host_;
std::unique_ptr<ProcessNodeImpl> process_node_;
raw_ptr<DestructionObserver> destruction_observer_ = nullptr;
};
} // namespace performance_manager
#endif // COMPONENTS_PERFORMANCE_MANAGER_RENDER_PROCESS_USER_DATA_H_
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