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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_FREE_SPACE_INL_H_
#define V8_OBJECTS_FREE_SPACE_INL_H_
#include "src/objects/free-space.h"
#include "src/execution/isolate.h"
#include "src/heap/heap-write-barrier-inl.h"
#include "src/heap/heap.h"
#include "src/objects/objects-inl.h"
// Has to be the last include (doesn't have include guards):
#include "src/objects/object-macros.h"
namespace v8 {
namespace internal {
OBJECT_CONSTRUCTORS_IMPL(FreeSpace, HeapObject)
SMI_ACCESSORS(FreeSpace, size, kSizeOffset)
RELAXED_SMI_ACCESSORS(FreeSpace, size, kSizeOffset)
int FreeSpace::Size() { return size(); }
FreeSpace FreeSpace::next() {
DCHECK(IsValid());
return FreeSpace::unchecked_cast(
TaggedField<Object, kNextOffset>::load(*this));
}
void FreeSpace::set_next(FreeSpace next) {
DCHECK(IsValid());
RELAXED_WRITE_FIELD(*this, kNextOffset, next);
}
FreeSpace FreeSpace::cast(HeapObject o) {
SLOW_DCHECK(!GetHeapFromWritableObject(o)->deserialization_complete() ||
o.IsFreeSpace());
return bit_cast<FreeSpace>(o);
}
FreeSpace FreeSpace::unchecked_cast(const Object o) {
return bit_cast<FreeSpace>(o);
}
bool FreeSpace::IsValid() {
Heap* heap = GetHeapFromWritableObject(*this);
Object free_space_map =
Isolate::FromHeap(heap)->root(RootIndex::kFreeSpaceMap);
CHECK_IMPLIES(!map_slot().contains_value(free_space_map.ptr()),
!heap->deserialization_complete() &&
map_slot().contains_value(kNullAddress));
CHECK_LE(kNextOffset + kTaggedSize, relaxed_read_size());
return true;
}
} // namespace internal
} // namespace v8
#include "src/objects/object-macros-undef.h"
#endif // V8_OBJECTS_FREE_SPACE_INL_H_