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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 http://mozilla.org/MPL/2.0/. */
/* Pull descriptor objects for tracking byte stream pull-into requests. */
#ifndef builtin_streams_PullIntoDescriptor_h
#define builtin_streams_PullIntoDescriptor_h
#include <stdint.h> // int32_t, uint32_t
#include "js/Class.h" // JSClass
#include "vm/ArrayBufferObject.h" // js::ArrayBufferObject;
#include "vm/NativeObject.h" // js::NativeObject
namespace js {
enum class ReaderType : int32_t { Default = 0, BYOB = 1 };
class PullIntoDescriptor : public NativeObject {
private:
enum Slots {
Slot_buffer,
Slot_ByteOffset,
Slot_ByteLength,
Slot_BytesFilled,
Slot_ElementSize,
Slot_Ctor,
Slot_ReaderType,
SlotCount
};
public:
static const JSClass class_;
ArrayBufferObject* buffer() {
return &getFixedSlot(Slot_buffer).toObject().as<ArrayBufferObject>();
}
void setBuffer(ArrayBufferObject* buffer) {
setFixedSlot(Slot_buffer, ObjectValue(*buffer));
}
JSObject* ctor() { return getFixedSlot(Slot_Ctor).toObjectOrNull(); }
uint32_t byteOffset() const {
return getFixedSlot(Slot_ByteOffset).toInt32();
}
uint32_t byteLength() const {
return getFixedSlot(Slot_ByteLength).toInt32();
}
uint32_t bytesFilled() const {
return getFixedSlot(Slot_BytesFilled).toInt32();
}
void setBytesFilled(int32_t bytes) {
setFixedSlot(Slot_BytesFilled, Int32Value(bytes));
}
uint32_t elementSize() const {
return getFixedSlot(Slot_ElementSize).toInt32();
}
ReaderType readerType() const {
int32_t n = getFixedSlot(Slot_ReaderType).toInt32();
MOZ_ASSERT(n == int32_t(ReaderType::Default) ||
n == int32_t(ReaderType::BYOB));
return ReaderType(n);
}
static PullIntoDescriptor* create(JSContext* cx,
JS::Handle<ArrayBufferObject*> buffer,
uint32_t byteOffset, uint32_t byteLength,
uint32_t bytesFilled, uint32_t elementSize,
JS::Handle<JSObject*> ctor,
ReaderType readerType);
};
} // namespace js
#endif // builtin_streams_PullIntoDescriptor_h
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