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// Copyright 2020 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_CPPGC_INCREMENTAL_MARKING_SCHEDULE_H_
#define V8_HEAP_CPPGC_INCREMENTAL_MARKING_SCHEDULE_H_
#include <atomic>
#include "src/base/platform/time.h"
namespace cppgc {
namespace internal {
class V8_EXPORT_PRIVATE IncrementalMarkingSchedule {
public:
// Estimated duration of GC cycle in milliseconds.
static const double kEstimatedMarkingTimeMs;
// Minimum number of bytes that should be marked during an incremental
// marking step.
static const size_t kMinimumMarkedBytesPerIncrementalStep;
void NotifyIncrementalMarkingStart();
void UpdateIncrementalMarkedBytes(size_t);
void AddConcurrentlyMarkedBytes(size_t);
size_t GetOverallMarkedBytes();
size_t GetNextIncrementalStepDuration(size_t);
void SetElapsedTimeForTesting(double elapsed_time) {
elapsed_time_for_testing_ = elapsed_time;
}
private:
double GetElapsedTimeInMs(v8::base::TimeTicks);
v8::base::TimeTicks incremental_marking_start_time_;
size_t incrementally_marked_bytes_ = 0;
std::atomic_size_t concurrently_marked_bytes_{0};
// Using -1 as sentinel to denote
static constexpr double kNoSetElapsedTimeForTesting = -1;
double elapsed_time_for_testing_ = kNoSetElapsedTimeForTesting;
};
} // namespace internal
} // namespace cppgc
#endif // V8_HEAP_CPPGC_INCREMENTAL_MARKING_SCHEDULE_H_
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