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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
this.EXPORTED_SYMBOLS = ["ResponsivenessMonitor"];
const { classes: Cc, interfaces: Ci } = Components;
function ResponsivenessMonitor(intervalMS = 100) {
this._intervalMS = intervalMS;
this._prevTimestamp = Date.now();
this._accumulatedDelay = 0;
this._timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
this._timer.initWithCallback(this, this._intervalMS, Ci.nsITimer.TYPE_REPEATING_SLACK);
}
ResponsivenessMonitor.prototype = {
notify() {
let now = Date.now();
this._accumulatedDelay += Math.max(0, now - this._prevTimestamp - this._intervalMS);
this._prevTimestamp = now;
},
abort() {
if (this._timer) {
this._timer.cancel();
this._timer = null;
}
},
finish() {
this.abort();
return this._accumulatedDelay;
},
};
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