1// Copyright 2014 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28var global = this.global || {};
29var setTimeout;
30var clearTimeout;
31
32(function() {
33var timers = {};
34var currentId = 0;
35
36function PostMicrotask(fn) {
37  var o = {};
38  Object.observe(o, function() {
39    fn();
40  });
41  // Change something to enqueue a microtask.
42  o.x = 'hello';
43}
44
45setInterval = function(fn, delay) {
46  var i = 0;
47  var id = currentId++;
48  function loop() {
49    if (!timers[id]) {
50      return;
51    }
52    if (i++ >= delay) {
53      fn();
54    }
55    PostMicrotask(loop);
56  }
57  PostMicrotask(loop);
58  timers[id] = true;
59  return id;
60}
61
62clearTimeout = function(id) {
63  delete timers[id];
64}
65
66clearInterval = clearTimeout;
67
68setTimeout = function(fn, delay) {
69  var id = setInterval(function() {
70    fn();
71    clearInterval(id);
72  }, delay);
73  return id;
74}
75
76}());
77