Implement SharedArrayBuffer

src/harmony-sharedarraybuffer.js

+// Copyright 2015 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.
+
+(function(global, shared, exports) {
+
+"use strict";
+
+%CheckIsBootstrapping();
+
+var GlobalSharedArrayBuffer = global.SharedArrayBuffer;
+var GlobalObject = global.Object;
+
+// -------------------------------------------------------------------
+
+function SharedArrayBufferConstructor(length) { // length = 1
+  if (%_IsConstructCall()) {
+    var byteLength = $toPositiveInteger(length, kInvalidArrayBufferLength);
+    %ArrayBufferInitialize(this, byteLength, kShared);
+  } else {
+    throw MakeTypeError(kConstructorNotFunction, "SharedArrayBuffer");
+  }
+}
+
+function SharedArrayBufferGetByteLen() {
+  if (!IS_SHAREDARRAYBUFFER(this)) {
+    throw MakeTypeError(kIncompatibleMethodReceiver,
+                        'SharedArrayBuffer.prototype.byteLength', this);
+  }
+  return %_ArrayBufferGetByteLength(this);
+}
+
+function SharedArrayBufferIsViewJS(obj) {
+  return %ArrayBufferIsView(obj);
+}
+
+
+// Set up the SharedArrayBuffer constructor function.
+%SetCode(GlobalSharedArrayBuffer, SharedArrayBufferConstructor);
+%FunctionSetPrototype(GlobalSharedArrayBuffer, new GlobalObject());
+
+// Set up the constructor property on the SharedArrayBuffer prototype object.
+%AddNamedProperty(GlobalSharedArrayBuffer.prototype, "constructor",
+                  GlobalSharedArrayBuffer, DONT_ENUM);
+
+%AddNamedProperty(GlobalSharedArrayBuffer.prototype,
+    symbolToStringTag, "SharedArrayBuffer", DONT_ENUM | READ_ONLY);
+
+$installGetter(GlobalSharedArrayBuffer.prototype, "byteLength",
+              SharedArrayBufferGetByteLen);
+
+$installFunctions(GlobalSharedArrayBuffer, DONT_ENUM, [
+    "isView", SharedArrayBufferIsViewJS
+]);
+
+})