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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 {
// 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 Struct {
public:
static int GetInitialInterruptBudget() {
if (FLAG_lazy_feedback_allocation) {
return FLAG_budget_for_feedback_vector_allocation;
}
return FLAG_interrupt_budget;
}
// [value]: value of the cell.
DECL_ACCESSORS(value, HeapObject)
DECL_INT32_ACCESSORS(interrupt_budget)
DECL_CAST(FeedbackCell)
// Dispatched behavior.
DECL_PRINTER(FeedbackCell)
DECL_VERIFIER(FeedbackCell)
// Layout description.
DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize,
TORQUE_GENERATED_FEEDBACK_CELL_FIELDS)
static const int kUnalignedSize = kSize;
static const int kAlignedSize = RoundUp<kObjectAlignment>(int{kSize});
inline void clear_padding();
inline void reset();
using BodyDescriptor =
FixedBodyDescriptor<kValueOffset, kInterruptBudgetOffset, kAlignedSize>;
OBJECT_CONSTRUCTORS(FeedbackCell, Struct);
};
} // namespace internal
} // namespace v8
#include "src/objects/object-macros-undef.h"
#endif // V8_OBJECTS_FEEDBACK_CELL_H_