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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_COMPACTOR_H_
#define V8_HEAP_CPPGC_COMPACTOR_H_
#include "src/heap/cppgc/compaction-worklists.h"
#include "src/heap/cppgc/garbage-collector.h"
#include "src/heap/cppgc/raw-heap.h"
namespace cppgc {
namespace internal {
class V8_EXPORT_PRIVATE Compactor final {
using CompactableSpaceHandling =
Sweeper::SweepingConfig::CompactableSpaceHandling;
public:
explicit Compactor(RawHeap&);
~Compactor() { DCHECK(!is_enabled_); }
void InitializeIfShouldCompact(GarbageCollector::Config::MarkingType,
GarbageCollector::Config::StackState);
// Returns true is compaction was cancelled.
bool CancelIfShouldNotCompact(GarbageCollector::Config::MarkingType,
GarbageCollector::Config::StackState);
CompactableSpaceHandling CompactSpacesIfEnabled();
CompactionWorklists* compaction_worklists() {
return compaction_worklists_.get();
}
void EnableForNextGCForTesting() { enable_for_next_gc_for_testing_ = true; }
bool IsEnabledForTesting() const { return is_enabled_; }
private:
bool ShouldCompact(GarbageCollector::Config::MarkingType,
GarbageCollector::Config::StackState);
RawHeap& heap_;
// Compactor does not own the compactable spaces. The heap owns all spaces.
std::vector<NormalPageSpace*> compactable_spaces_;
std::unique_ptr<CompactionWorklists> compaction_worklists_;
bool is_enabled_ = false;
bool enable_for_next_gc_for_testing_ = false;
};
} // namespace internal
} // namespace cppgc
#endif // V8_HEAP_CPPGC_COMPACTOR_H_
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