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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.
#include "components/performance_manager/public/resource_attribution/worker_context.h"
#include <optional>
#include <utility>
#include "base/check.h"
#include "base/memory/weak_ptr.h"
#include "base/strings/strcat.h"
#include "components/performance_manager/graph/worker_node_impl.h"
#include "components/performance_manager/public/graph/graph.h"
#include "components/performance_manager/public/performance_manager.h"
#include "components/performance_manager/resource_attribution/performance_manager_aliases.h"
#include "content/public/browser/browser_thread.h"
#include "third_party/blink/public/common/tokens/tokens.h"
namespace resource_attribution {
WorkerContext::WorkerContext(const blink::WorkerToken& token,
base::WeakPtr<WorkerNode> weak_node)
: token_(token), weak_node_(weak_node) {}
WorkerContext::~WorkerContext() = default;
WorkerContext::WorkerContext(const WorkerContext& other) = default;
WorkerContext& WorkerContext::operator=(const WorkerContext& other) = default;
WorkerContext::WorkerContext(WorkerContext&& other) = default;
WorkerContext& WorkerContext::operator=(WorkerContext&& other) = default;
// static
std::optional<WorkerContext> WorkerContext::FromWorkerToken(
const blink::WorkerToken& token) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
base::WeakPtr<WorkerNode> worker_node =
PerformanceManager::GetWorkerNodeForToken(token);
if (!worker_node.MaybeValid()) {
// This token was never seen by PerformanceManager.
return std::nullopt;
}
return WorkerContext(token, std::move(worker_node));
}
blink::WorkerToken WorkerContext::GetWorkerToken() const {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
return token_;
}
base::WeakPtr<WorkerNode> WorkerContext::GetWeakWorkerNode() const {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
return weak_node_;
}
// static
WorkerContext WorkerContext::FromWorkerNode(const WorkerNode* node) {
CHECK(node);
DCHECK_ON_GRAPH_SEQUENCE(node->GetGraph());
auto* node_impl = WorkerNodeImpl::FromNode(node);
return WorkerContext(node_impl->GetWorkerToken(), node_impl->GetWeakPtr());
}
// static
std::optional<WorkerContext> WorkerContext::FromWeakWorkerNode(
base::WeakPtr<WorkerNode> node) {
if (!node) {
return std::nullopt;
}
return FromWorkerNode(node.get());
}
WorkerNode* WorkerContext::GetWorkerNode() const {
if (weak_node_) {
// `weak_node` will check anyway if dereferenced from the wrong sequence,
// but let's be explicit.
DCHECK_ON_GRAPH_SEQUENCE(weak_node_->GetGraph());
return weak_node_.get();
}
return nullptr;
}
std::string WorkerContext::ToString() const {
return base::StrCat({"WorkerContext:", token_.ToString()});
}
} // namespace resource_attribution
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