1// Copyright 2012 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef V8_HEAP_INCREMENTAL_MARKING_JOB_H_
6#define V8_HEAP_INCREMENTAL_MARKING_JOB_H_
7
8#include "src/cancelable-task.h"
9
10namespace v8 {
11namespace internal {
12
13class Heap;
14class Isolate;
15
16// The incremental marking job uses platform tasks to perform incremental
17// marking steps. The job posts a foreground task that makes a small (~1ms)
18// step and posts another task until the marking is completed.
19class IncrementalMarkingJob {
20 public:
21  class Task : public CancelableTask {
22   public:
23    explicit Task(Isolate* isolate, IncrementalMarkingJob* job)
24        : CancelableTask(isolate), job_(job) {}
25    static void Step(Heap* heap);
26    // CancelableTask overrides.
27    void RunInternal() override;
28
29   private:
30    IncrementalMarkingJob* job_;
31  };
32
33  IncrementalMarkingJob() : task_pending_(false) {}
34
35  bool TaskPending() { return task_pending_; }
36
37  void Start(Heap* heap);
38
39  void NotifyTask();
40
41  void ScheduleTask(Heap* heap);
42
43 private:
44  bool task_pending_;
45};
46}  // namespace internal
47}  // namespace v8
48
49#endif  // V8_HEAP_INCREMENTAL_MARKING_JOB_H_
50