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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/. */
// Fills up aProcesses until max and then selects randomly from the available
// ones.
export function RandomSelector() {}
RandomSelector.prototype = {
classID: Components.ID("{c616fcfd-9737-41f1-aa74-cee72a38f91b}"),
QueryInterface: ChromeUtils.generateQI(["nsIContentProcessProvider"]),
provideProcess(aType, aProcesses, aMaxCount) {
if (aProcesses.length < aMaxCount) {
return Ci.nsIContentProcessProvider.NEW_PROCESS;
}
return Math.floor(Math.random() * aMaxCount);
},
};
// Fills up aProcesses until max and then selects one from the available
// ones that host the least number of tabs.
export function MinTabSelector() {}
MinTabSelector.prototype = {
classID: Components.ID("{2dc08eaf-6eef-4394-b1df-a3a927c1290b}"),
QueryInterface: ChromeUtils.generateQI(["nsIContentProcessProvider"]),
provideProcess(aType, aProcesses, aMaxCount) {
let min = Number.MAX_VALUE;
let candidate = Ci.nsIContentProcessProvider.NEW_PROCESS;
// The reason for not directly using aProcesses.length here is because if
// we keep processes alive for testing but want a test to use only single
// content process we can just keep relying on dom.ipc.processCount = 1
// this way.
let numIters = Math.min(aProcesses.length, aMaxCount);
for (let i = 0; i < numIters; i++) {
let process = aProcesses[i];
let tabCount = process.tabCount;
if (tabCount < min) {
min = tabCount;
candidate = i;
}
}
// If all current processes have at least one tab and we have not yet
// reached the maximum, spawn a new process.
if (min > 0 && aProcesses.length < aMaxCount) {
return Ci.nsIContentProcessProvider.NEW_PROCESS;
}
// Otherwise we use candidate.
return candidate;
},
};
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