Add d8 API for spawning function on a new thread.

test/mjsunit/d8-worker.js

-// Copyright 2014 the V8 project authors. All rights reserved.
+// Copyright 2015 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --allow-natives-syntax
+// Test the Worker.new function of d8.  This test only makes sense with d8.
+// Worker.new spawns a new OS thread and isolate, and runs it concurrently with
+// the current running thread.
 
-var o = {a:1.5};
-o.a = 0;
-var a = o.a;
-
-function g() {
-  return 1;
+function f() {
+  // Set a global variable; should not be visible outside of the worker's
+  // context.
+  foo = 100;
+  return "OK";
 }
 
-var o2 = {a:{}};
+Worker.new(f);
 
-function f() {
-  var result = {a: a};
-  var literal = {x:g()};
-  return [result, literal];
-}
+// Currently can only create one worker at a time.
+assertThrows(function() { Worker.new(f); });
 
-f();
-f();
-%OptimizeFunctionOnNextCall(f);
-assertEquals(1, f()[1].x);
+var result = Worker.join();

[binji, 2015/06/15 19:11:48]

This API is a bit strange, but was the easiest to implement.

+assertEquals("undefined", typeof foo);
+assertEquals("OK", result);