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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
#ifndef vm_ArrayObject_inl_h
#define vm_ArrayObject_inl_h
#include "vm/ArrayObject.h"
#include "gc/Allocator.h"
#include "gc/GCProbes.h"
#include "vm/JSObject-inl.h"
#include "vm/NativeObject-inl.h"
namespace js {
/* static */ MOZ_ALWAYS_INLINE ArrayObject* ArrayObject::create(
JSContext* cx, gc::AllocKind kind, gc::InitialHeap heap,
Handle<SharedShape*> shape, uint32_t length, uint32_t slotSpan,
AutoSetNewObjectMetadata& metadata, gc::AllocSite* site) {
debugCheckNewObject(shape, kind, heap);
const JSClass* clasp = &ArrayObject::class_;
MOZ_ASSERT(shape->getObjectClass() == clasp);
// Note: the slot span is passed as argument to allow more constant folding
// below for the common case of slotSpan == 0.
MOZ_ASSERT(shape->slotSpan() == slotSpan);
// Arrays can use their fixed slots to store elements, so can't have shapes
// which allow named properties to be stored in the fixed slots.
MOZ_ASSERT(shape->numFixedSlots() == 0);
size_t nDynamicSlots = calculateDynamicSlots(0, slotSpan, clasp);
ArrayObject* aobj = cx->newCell<ArrayObject>(kind, heap, clasp, site);
if (!aobj) {
return nullptr;
aobj->initFixedElements(kind, length);
if (!nDynamicSlots) {
} else if (!aobj->allocateInitialSlots(cx, nDynamicSlots)) {
return nullptr;
if (slotSpan > 0) {
return aobj;
inline DenseElementResult ArrayObject::addDenseElementNoLengthChange(
JSContext* cx, uint32_t index, const Value& val) {
// Only support the `index < length` case so that we don't have to increase
// the array's .length value below.
if (index >= length() || containsDenseElement(index) || isIndexed()) {
return DenseElementResult::Incomplete;
DenseElementResult res = ensureDenseElements(cx, index, 1);
if (MOZ_UNLIKELY(res != DenseElementResult::Success)) {
return res;
initDenseElement(index, val);
return DenseElementResult::Success;
} // namespace js
#endif // vm_ArrayObject_inl_h