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 28 var global = this.global || {}; 29 var setTimeout; 30 var clearTimeout; 31 32 (function() { 33 var timers = {}; 34 var currentId = 0; 35 36 function 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 45 setInterval = 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 62 clearTimeout = function(id) { 63 delete timers[id]; 64 } 65 66 clearInterval = clearTimeout; 67 68 setTimeout = function(fn, delay) { 69 var id = setInterval(function() { 70 fn(); 71 clearInterval(id); 72 }, delay); 73 return id; 74 } 75 76 }()); 77
