WIP SharedArrayBuffer implementation

src/arraybuffer.js

Index: src/arraybuffer.js
diff --git a/src/arraybuffer.js b/src/arraybuffer.js
index cbb51433bb68e7781aa98443019f88d64f8d9c49..3c5ccbddf7db2baedc128357ae78a4c0f04f73d2 100644
--- a/src/arraybuffer.js
+++ b/src/arraybuffer.js
@@ -11,7 +11,7 @@ var $ArrayBuffer = global.ArrayBuffer;
 function ArrayBufferConstructor(length) { // length = 1
   if (%_IsConstructCall()) {
     var byteLength = ToPositiveInteger(length, 'invalid_array_buffer_length');
-    %ArrayBufferInitialize(this, byteLength);
+    %ArrayBufferInitialize(this, byteLength, false);
   } else {
     throw MakeTypeError('constructor_not_function', ["ArrayBuffer"]);
   }
@@ -92,3 +92,52 @@ function SetUpArrayBuffer() {
 }
 
 SetUpArrayBuffer();
+
+// -------------------------------------------------------------------
+
+var $SharedArrayBuffer = global.SharedArrayBuffer;
+
+function SharedArrayBufferConstructor(length) { // length = 1
+  if (%_IsConstructCall()) {
+    var byteLength = ToPositiveInteger(length, 'invalid_array_buffer_length');
+    %ArrayBufferInitialize(this, byteLength, true);
+  } else {
+    throw MakeTypeError('constructor_not_function', ["SharedArrayBuffer"]);
+  }
+}
+
+function SharedArrayBufferGetByteLen() {
+  if (!IS_SHAREDARRAYBUFFER(this)) {
+    throw MakeTypeError('incompatible_method_receiver',
+                        ['SharedArrayBuffer.prototype.byteLength', this]);
+  }
+  return %_ArrayBufferGetByteLength(this);
+}
+
+function SharedArrayBufferIsViewJS(obj) {
+  return %ArrayBufferIsView(obj);
+}
+
+function SetUpSharedArrayBuffer() {
+  %CheckIsBootstrapping();
+
+  // Set up the SharedArrayBuffer constructor function.
+  %SetCode($SharedArrayBuffer, SharedArrayBufferConstructor);
+  %FunctionSetPrototype($SharedArrayBuffer, new $Object());
+
+  // Set up the constructor property on the SharedArrayBuffer prototype object.
+  %AddNamedProperty($SharedArrayBuffer.prototype, "constructor",
+      $SharedArrayBuffer, DONT_ENUM);
+
+  %AddNamedProperty($SharedArrayBuffer.prototype,
+      symbolToStringTag, "SharedArrayBuffer", DONT_ENUM | READ_ONLY);
+
+  InstallGetter($SharedArrayBuffer.prototype, "byteLength",
+                SharedArrayBufferGetByteLen);
+
+  InstallFunctions($SharedArrayBuffer, DONT_ENUM, $Array(
+      "isView", SharedArrayBufferIsViewJS
+  ));
+}
+
+SetUpSharedArrayBuffer();