// Copyright 2019 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.

bitfield struct JSArrayBufferFlags extends uint32 {

is_external: bool: 1 bit;

is_detachable: bool: 1 bit;

was_detached: bool: 1 bit;

is_asm_js_memory: bool: 1 bit;

is_shared: bool: 1 bit;

}

@generateCppClass

extern class JSArrayBuffer extends JSObject {

byte_length: uintptr;

backing_store: ExternalPointer;

extension: RawPtr;

bit_field: JSArrayBufferFlags;

// Pads header size to be a multiple of kTaggedSize.

@if(TAGGED_SIZE_8_BYTES) optional_padding: uint32;

@ifnot(TAGGED_SIZE_8_BYTES) optional_padding: void;

}

extern operator '.backing_store_ptr' macro LoadJSArrayBufferBackingStorePtr(

JSArrayBuffer): RawPtr;

@export

macro IsDetachedBuffer(buffer: JSArrayBuffer): bool {

return buffer.bit_field.was_detached;

}

macro IsSharedArrayBuffer(buffer: JSArrayBuffer): bool {

return buffer.bit_field.is_shared;

}

@abstract

@generateCppClass

extern class JSArrayBufferView extends JSObject {

buffer: JSArrayBuffer;

byte_offset: uintptr;

byte_length: uintptr;

}

@generateCppClass

extern class JSTypedArray extends JSArrayBufferView {

length: uintptr;

external_pointer: ExternalPointer;

// [base_pointer]: TODO(v8:4153)

base_pointer: ByteArray|Smi;

}

@generateCppClass

extern class JSDataView extends JSArrayBufferView {

data_pointer: ExternalPointer;

}