1/* 2 * Copyright (C) 2013 Apple Inc. All rights reserved. 3 * Copyright (C) 2014 University of Washington 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 15 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 16 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 18 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 20 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 21 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 22 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 23 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 24 * THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27WebInspector.messagesToDispatch = []; 28 29WebInspector.dispatchNextQueuedMessageFromBackend = function() 30{ 31 var startCount = WebInspector.messagesToDispatch.length; 32 var startTime = Date.now(); 33 var timeLimitPerRunLoop = 10; // milliseconds 34 35 var i = 0; 36 for (; i < WebInspector.messagesToDispatch.length; ++i) { 37 // Defer remaining messages if we have taken too long. In practice, single 38 // messages like Page.getResourceContent blow through the time budget. 39 if (Date.now() - startTime > timeLimitPerRunLoop) 40 break; 41 42 InspectorBackend.dispatch(WebInspector.messagesToDispatch[i]); 43 } 44 45 if (i === WebInspector.messagesToDispatch.length) { 46 WebInspector.messagesToDispatch = []; 47 WebInspector._dispatchTimeout = null; 48 } else { 49 WebInspector.messagesToDispatch = WebInspector.messagesToDispatch.slice(i); 50 WebInspector._dispatchTimeout = setTimeout(WebInspector.dispatchNextQueuedMessageFromBackend, 0); 51 } 52 53 if (InspectorBackend.dumpInspectorTimeStats) 54 console.log("time-stats: --- RunLoop duration: " + (Date.now() - startTime) + "ms; dispatched: " + (startCount - WebInspector.messagesToDispatch.length) + "; remaining: " + WebInspector.messagesToDispatch.length); 55} 56 57WebInspector.dispatchMessageFromBackend = function(message) 58{ 59 // Enforce asynchronous interaction between the backend and the frontend by queueing messages. 60 // The messages are dequeued on a zero delay timeout. 61 62 this.messagesToDispatch.push(message); 63 64 if (this._dispatchTimeout) 65 return; 66 67 this._dispatchTimeout = setTimeout(WebInspector.dispatchNextQueuedMessageFromBackend, 0); 68} 69