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// Copyright 2018 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_OBJECTS_FEEDBACK_CELL_H_
#define V8_OBJECTS_FEEDBACK_CELL_H_
#include "src/objects/struct.h"
// Has to be the last include (doesn't have include guards):
#include "src/objects/object-macros.h"
namespace v8 {
namespace internal {
#include "torque-generated/src/objects/feedback-cell-tq.inc"
// This is a special cell used to maintain both the link between a
// closure and its feedback vector, as well as a way to count the
// number of closures created for a certain function per native
// context. There's at most one FeedbackCell for each function in
// a native context.
class FeedbackCell : public TorqueGeneratedFeedbackCell<FeedbackCell, Struct> {
public:
// Dispatched behavior.
DECL_PRINTER(FeedbackCell)
static const int kUnalignedSize = kSize;
static const int kAlignedSize = RoundUp<kObjectAlignment>(int{kSize});
using TorqueGeneratedFeedbackCell<FeedbackCell, Struct>::value;
using TorqueGeneratedFeedbackCell<FeedbackCell, Struct>::set_value;
DECL_RELEASE_ACQUIRE_ACCESSORS(value, HeapObject)
inline void clear_padding();
inline void reset_feedback_vector(
base::Optional<std::function<void(HeapObject object, ObjectSlot slot,
HeapObject target)>>
gc_notify_updated_slot = base::nullopt);
inline void SetInitialInterruptBudget();
// The closure count is encoded in the cell's map, which distinguishes
// between zero, one, or many closures. This function records a new closure
// creation by updating the map.
inline void IncrementClosureCount(Isolate* isolate);
using BodyDescriptor =
FixedBodyDescriptor<kValueOffset, kInterruptBudgetOffset, kAlignedSize>;
TQ_OBJECT_CONSTRUCTORS(FeedbackCell)
};
} // namespace internal
} // namespace v8
#include "src/objects/object-macros-undef.h"
#endif // V8_OBJECTS_FEEDBACK_CELL_H_
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