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/tasks/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 final {
20 public:
21  enum class TaskType { kNormal, kDelayed };
22
23  IncrementalMarkingJob() V8_NOEXCEPT = default;
24
25  void Start(Heap* heap);
26
27  void ScheduleTask(Heap* heap, TaskType task_type = TaskType::kNormal);
28
29  double CurrentTimeToTask(Heap* heap) const;
30
31 private:
32  class Task;
33  static constexpr double kDelayInSeconds = 10.0 / 1000.0;
34
35  bool IsTaskPending(TaskType task_type) const {
36    return task_type == TaskType::kNormal ? normal_task_pending_
37                                          : delayed_task_pending_;
38  }
39
40  void SetTaskPending(TaskType task_type, bool value) {
41    if (task_type == TaskType::kNormal) {
42      normal_task_pending_ = value;
43    } else {
44      delayed_task_pending_ = value;
45    }
46  }
47
48  base::Mutex mutex_;
49  double scheduled_time_ = 0.0;
50  bool normal_task_pending_ = false;
51  bool delayed_task_pending_ = false;
52};
53}  // namespace internal
54}  // namespace v8
55
56#endif  // V8_HEAP_INCREMENTAL_MARKING_JOB_H_
57