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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 */
/* Pull descriptor objects for tracking byte stream pull-into requests. */
#include "builtin/streams/PullIntoDescriptor.h"
#include <stdint.h> // uint32_t
#include "js/Class.h" // JSClass, JSCLASS_HAS_RESERVED_SLOTS
#include "js/RootingAPI.h" // JS::Handle, JS::Rooted
#include "vm/JSObject-inl.h" // js::NewBuiltinClassInstance
using js::PullIntoDescriptor;
using JS::Handle;
using JS::Int32Value;
using JS::ObjectOrNullValue;
using JS::ObjectValue;
using JS::Rooted;
/* static */ PullIntoDescriptor* PullIntoDescriptor::create(
JSContext* cx, Handle<ArrayBufferObject*> buffer, uint32_t byteOffset,
uint32_t byteLength, uint32_t bytesFilled, uint32_t elementSize,
Handle<JSObject*> ctor, ReaderType readerType) {
Rooted<PullIntoDescriptor*> descriptor(
cx, NewBuiltinClassInstance<PullIntoDescriptor>(cx));
if (!descriptor) {
return nullptr;
descriptor->setFixedSlot(Slot_buffer, ObjectValue(*buffer));
descriptor->setFixedSlot(Slot_Ctor, ObjectOrNullValue(ctor));
descriptor->setFixedSlot(Slot_ByteOffset, Int32Value(byteOffset));
descriptor->setFixedSlot(Slot_ByteLength, Int32Value(byteLength));
descriptor->setFixedSlot(Slot_BytesFilled, Int32Value(bytesFilled));
descriptor->setFixedSlot(Slot_ElementSize, Int32Value(elementSize));
return descriptor;
const JSClass PullIntoDescriptor::class_ = {
"PullIntoDescriptor", JSCLASS_HAS_RESERVED_SLOTS(SlotCount)};