Line data    Source code

       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             :   enum class TaskType { kNormal, kDelayed };
      22             : 
      23       62441 :   IncrementalMarkingJob() V8_NOEXCEPT = default;
      24             : 
      25             :   void Start(Heap* heap);
      26             : 
      27             :   void ScheduleTask(Heap* heap, TaskType task_type = TaskType::kNormal);
      28             : 
      29             :  private:
      30             :   class Task;
      31             :   static constexpr double kDelayInSeconds = 10.0 / 1000.0;
      32             : 
      33             :   bool IsTaskPending(TaskType task_type) {
      34             :     return task_type == TaskType::kNormal ? normal_task_pending_
      35     1085329 :                                           : delayed_task_pending_;
      36             :   }
      37             :   void SetTaskPending(TaskType task_type, bool value) {
      38       63460 :     if (task_type == TaskType::kNormal) {
      39       57506 :       normal_task_pending_ = value;
      40             :     } else {
      41        5954 :       delayed_task_pending_ = value;
      42             :     }
      43             :   }
      44             : 
      45             :   bool normal_task_pending_ = false;
      46             :   bool delayed_task_pending_ = false;
      47             : };
      48             : }  // namespace internal
      49             : }  // namespace v8
      50             : 
      51             : #endif  // V8_HEAP_INCREMENTAL_MARKING_JOB_H_