WIP SharedArrayBuffer implementation

src/harmony-sharedarraybuffer.js

Index: src/harmony-sharedarraybuffer.js
diff --git a/src/harmony-sharedarraybuffer.js b/src/harmony-sharedarraybuffer.js
new file mode 100644
index 0000000000000000000000000000000000000000..915e2b41460a98573c36624058f01225add76e81
--- /dev/null
+++ b/src/harmony-sharedarraybuffer.js
@@ -0,0 +1,54 @@
+// 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() {
+
+"use strict";
+
+%CheckIsBootstrapping();
+
+// -------------------------------------------------------------------
+
+var GlobalSharedArrayBuffer = global.SharedArrayBuffer;
+
+function SharedArrayBufferConstructor(length) { // length = 1
+  if (%_IsConstructCall()) {
+    var byteLength = ToPositiveInteger(length, 'invalid_array_buffer_length');
+    %ArrayBufferInitialize(this, byteLength);
+  } else {
+    throw MakeTypeError('constructor_not_function', ["SharedArrayBuffer"]);
+  }
+}
+
+function SharedArrayBufferGetByteLen() {
+  if (!IS_SHAREDARRAYBUFFER(this)) {
+    throw MakeTypeError('incompatible_method_receiver',
+                        ['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 $Object());
+
+// 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, $Array(
+    "isView", SharedArrayBufferIsViewJS
+));
+
+})();