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 
10 namespace v8 {
11 namespace internal {
12 
13 class Heap;
14 class 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.
19 class IncrementalMarkingJob {
20  public:
21   class Task : public CancelableTask {
22    public:
Task(Isolate * isolate,IncrementalMarkingJob * job)23     explicit Task(Isolate* isolate, IncrementalMarkingJob* job)
24         : CancelableTask(isolate), isolate_(isolate), job_(job) {}
25     static void Step(Heap* heap);
26     // CancelableTask overrides.
27     void RunInternal() override;
28 
isolate()29     Isolate* isolate() { return isolate_; }
30 
31    private:
32     Isolate* isolate_;
33     IncrementalMarkingJob* job_;
34   };
35 
IncrementalMarkingJob()36   IncrementalMarkingJob() : task_pending_(false) {}
37 
TaskPending()38   bool TaskPending() { return task_pending_; }
39 
40   void Start(Heap* heap);
41 
42   void ScheduleTask(Heap* heap);
43 
44  private:
45   bool task_pending_;
46 };
47 }  // namespace internal
48 }  // namespace v8
49 
50 #endif  // V8_HEAP_INCREMENTAL_MARKING_JOB_H_
51