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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_PUBLIC_RESOURCE_ATTRIBUTION_WORKER_CONTEXT_H_
#define COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_RESOURCE_ATTRIBUTION_WORKER_CONTEXT_H_
#include <compare>
#include <optional>
#include <string>
#include "base/memory/weak_ptr.h"
#include "third_party/blink/public/common/tokens/tokens.h"
namespace performance_manager {
class WorkerNode;
} // namespace performance_manager
namespace resource_attribution {
class WorkerContext {
public:
~WorkerContext();
WorkerContext(const WorkerContext& other);
WorkerContext& operator=(const WorkerContext& other);
WorkerContext(WorkerContext&& other);
WorkerContext& operator=(WorkerContext&& other);
// UI thread methods.
// Returns the WorkerContext for `token`. Returns nullopt if the WorkerToken
// is not registered with PerformanceManager.
static std::optional<WorkerContext> FromWorkerToken(
const blink::WorkerToken& token);
// Returns the WorkerToken for this context.
blink::WorkerToken GetWorkerToken() const;
// Returns the WorkerNode for this context, or a null WeakPtr if it no longer
// exists.
base::WeakPtr<performance_manager::WorkerNode> GetWeakWorkerNode() const;
// PM sequence methods.
// Returns the WorkerContext for `node`. Equivalent to
// node->GetResourceContext().
static WorkerContext FromWorkerNode(
const performance_manager::WorkerNode* node);
// Returns the WorkerContext for `node`, or nullopt if `node` is null.
static std::optional<WorkerContext> FromWeakWorkerNode(
base::WeakPtr<performance_manager::WorkerNode> node);
// Returns the WorkerNode for this context, or nullptr if it no longer exists.
performance_manager::WorkerNode* GetWorkerNode() const;
// Returns a string representation of the context for debugging. This matches
// the interface of base::TokenType and base::UnguessableToken, for
// convenience.
std::string ToString() const;
// Compare WorkerContexts by WorkerToken.
constexpr friend auto operator<=>(const WorkerContext& a,
const WorkerContext& b) {
return a.token_ <=> b.token_;
}
// Test WorkerContexts for equality by WorkerToken.
constexpr friend bool operator==(const WorkerContext& a,
const WorkerContext& b) {
return a.token_ == b.token_;
}
private:
WorkerContext(const blink::WorkerToken& token,
base::WeakPtr<performance_manager::WorkerNode> weak_node);
blink::WorkerToken token_;
base::WeakPtr<performance_manager::WorkerNode> weak_node_;
};
} // namespace resource_attribution
#endif // COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_RESOURCE_ATTRIBUTION_WORKER_CONTEXT_H_
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