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// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_HEAP_INCREMENTAL_MARKING_JOB_H_
#define V8_HEAP_INCREMENTAL_MARKING_JOB_H_
#include "src/tasks/cancelable-task.h"
namespace v8 {
namespace internal {
class Heap;
class Isolate;
// The incremental marking job uses platform tasks to perform incremental
// marking steps. The job posts a foreground task that makes a small (~1ms)
// step and posts another task until the marking is completed.
class IncrementalMarkingJob final {
public:
enum class TaskType { kNormal, kDelayed };
IncrementalMarkingJob() V8_NOEXCEPT = default;
void Start(Heap* heap);
void ScheduleTask(Heap* heap, TaskType task_type = TaskType::kNormal);
double CurrentTimeToTask(Heap* heap) const;
private:
class Task;
static constexpr double kDelayInSeconds = 10.0 / 1000.0;
bool IsTaskPending(TaskType task_type) const {
return task_type == TaskType::kNormal ? normal_task_pending_
: delayed_task_pending_;
}
void SetTaskPending(TaskType task_type, bool value) {
if (task_type == TaskType::kNormal) {
normal_task_pending_ = value;
} else {
delayed_task_pending_ = value;
}
}
base::Mutex mutex_;
double scheduled_time_ = 0.0;
bool normal_task_pending_ = false;
bool delayed_task_pending_ = false;
};
} // namespace internal
} // namespace v8
#endif // V8_HEAP_INCREMENTAL_MARKING_JOB_H_
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