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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 THIRD_PARTY_BLINK_RENDERER_CORE_SCHEDULER_DOM_TASK_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_SCHEDULER_DOM_TASK_H_
#include <optional>
#include "base/time/time.h"
#include "third_party/blink/public/common/scheduler/task_attribution_id.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise_resolver.h"
#include "third_party/blink/renderer/core/probe/async_task_context.h"
#include "third_party/blink/renderer/core/scheduler/dom_scheduler.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/scheduler/public/post_cancellable_task.h"
namespace blink {
class ScriptState;
class WebSchedulingTaskState;
class V8SchedulerPostTaskCallback;
// DOMTask represents a task scheduled via the web scheduling API. It will
// keep itself alive until DOMTask::Invoke is called, which may be after the
// callback's v8 context is invalid, in which case, the task will not be run.
class DOMTask final : public GarbageCollected<DOMTask> {
public:
DOMTask(ScriptPromiseResolver<IDLAny>*,
V8SchedulerPostTaskCallback*,
SchedulerTaskContext*,
DOMScheduler::DOMTaskQueue*,
base::TimeDelta delay,
uint64_t task_id_for_tracing);
void Trace(Visitor*) const;
void OnPendingPromiseSettled();
private:
enum class ExecutionState {
kNotStarted,
kRunningSync,
kRunningAsync,
kFinished,
};
// Entry point for running this DOMTask's |callback_|.
void Invoke();
// Internal step of Invoke that handles invoking the callback, including
// catching any errors and retrieving the result.
void InvokeInternal(ScriptState*);
void OnAbort();
void RemoveAbortAlgorithm();
TaskHandle task_handle_;
Member<V8SchedulerPostTaskCallback> callback_;
Member<ScriptPromiseResolver<IDLAny>> resolver_;
probe::AsyncTaskContext async_task_context_;
Member<WebSchedulingTaskState> web_scheduling_task_state_;
Member<AbortSignal::AlgorithmHandle> abort_handle_;
// Do not remove. For dynamic priority task queues, |task_queue_| ensures that
// the associated WebSchedulingTaskQueue stays alive until after this task
// runs, which is necessary to ensure throttling works correctly.
Member<DOMScheduler::DOMTaskQueue> task_queue_;
const base::TimeDelta delay_;
const uint64_t task_id_for_tracing_;
ExecutionState execution_state_ = ExecutionState::kNotStarted;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_SCHEDULER_DOM_TASK_H_
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