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/*******************************************************************************
ηMatrix - a browser extension to black/white list requests.
Copyright (C) 2015-2019 Raymond Hill
Copyright (C) 2019-2020 Alessio Vanni
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://libregit.spks.xyz/heckyel/ematrix
uMatrix Home: https://github.com/gorhill/uBlock
*/
'use strict';
ηMatrix.logger = (function () {
let LogEntry = function (args) {
this.init(args);
};
LogEntry.prototype.init = function (args) {
this.tstamp = Date.now();
this.tab = args[0] || '';
this.cat = args[1] || '';
this.d0 = args[2];
this.d1 = args[3];
this.d2 = args[4];
this.d3 = args[5];
};
var buffer = null;
var lastReadTime = 0;
var writePtr = 0;
// After 60 seconds without being read, a buffer will be considered
// unused, and thus removed from memory.
var logBufferObsoleteAfter = 30 * 1000;
var janitor = function () {
if (buffer !== null
&& lastReadTime < (Date.now() - logBufferObsoleteAfter)) {
buffer = null;
writePtr = 0;
api.ownerId = undefined;
}
if (buffer !== null) {
vAPI.setTimeout(janitor, logBufferObsoleteAfter);
}
};
var api = {
ownerId: undefined,
writeOne: function () {
if (buffer === null) {
return;
}
if (writePtr === buffer.length) {
buffer.push(new LogEntry(arguments));
} else {
buffer[writePtr].init(arguments);
}
writePtr += 1;
},
readAll: function (ownerId) {
this.ownerId = ownerId;
if (buffer === null) {
buffer = [];
vAPI.setTimeout(janitor, logBufferObsoleteAfter);
}
var out = buffer.slice(0, writePtr);
writePtr = 0;
lastReadTime = Date.now();
return out;
}
};
return api;
})();
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