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@@ -0,0 +1,355 @@
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"use strict";
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var __assign = (this && this.__assign) || function () {
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__assign = Object.assign || function(t) {
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for (var s, i = 1, n = arguments.length; i < n; i++) {
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s = arguments[i];
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for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
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t[p] = s[p];
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}
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return t;
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};
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return __assign.apply(this, arguments);
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};
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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});
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};
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var __generator = (this && this.__generator) || function (thisArg, body) {
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var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
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return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
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function verb(n) { return function (v) { return step([n, v]); }; }
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function step(op) {
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if (f) throw new TypeError("Generator is already executing.");
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while (_) try {
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if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
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if (y = 0, t) op = [op[0] & 2, t.value];
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switch (op[0]) {
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case 0: case 1: t = op; break;
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case 4: _.label++; return { value: op[1], done: false };
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case 5: _.label++; y = op[1]; op = [0]; continue;
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case 7: op = _.ops.pop(); _.trys.pop(); continue;
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default:
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if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
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if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
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if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
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if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
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if (t[2]) _.ops.pop();
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_.trys.pop(); continue;
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}
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op = body.call(thisArg, _);
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} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
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if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
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}
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};
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var __values = (this && this.__values) || function(o) {
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var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
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if (m) return m.call(o);
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if (o && typeof o.length === "number") return {
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next: function () {
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if (o && i >= o.length) o = void 0;
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return { value: o && o[i++], done: !o };
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}
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};
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throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.SharedTimedMutex = void 0;
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var List_1 = require("../container/List");
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var InvalidArgument_1 = require("../exception/InvalidArgument");
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var global_1 = require("./global");
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/**
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* Shared timed mutex.
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*
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* @author Jeongho Nam - https://github.com/samchon
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*/
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var SharedTimedMutex = /** @class */ (function () {
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function SharedTimedMutex(source) {
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if (source === void 0) { source = null; }
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this.source_ = source !== null ? source : this;
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this.queue_ = new List_1.List();
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this.writing_ = 0;
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this.reading_ = 0;
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}
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SharedTimedMutex.prototype._Current_access_type = function () {
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return this.queue_.empty() ? null : this.queue_.front().accessType;
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};
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/* ---------------------------------------------------------
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WRITE LOCK
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--------------------------------------------------------- */
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/**
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* @inheritDoc
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*/
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SharedTimedMutex.prototype.lock = function () {
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var _this = this;
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return new Promise(function (resolve) {
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// CONSTRUCT RESOLVER
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var resolver = {
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handler: _this.writing_++ === 0 && _this.reading_ === 0
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? null
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: resolve,
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accessType: 0 /* AccessType.WRITE */,
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lockType: 0 /* LockType.HOLD */,
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};
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_this.queue_.push_back(resolver);
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// LOCK OR WAIT
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if (resolver.handler === null)
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resolve();
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});
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};
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/**
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* @inheritDoc
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*/
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SharedTimedMutex.prototype.try_lock = function () {
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return __awaiter(this, void 0, void 0, function () {
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return __generator(this, function (_a) {
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// LOCKABLE ?
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if (this.writing_ !== 0 || this.reading_ !== 0)
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return [2 /*return*/, false];
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// CONSTRUCT RESOLVER
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this.queue_.push_back({
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handler: null,
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accessType: 0 /* AccessType.WRITE */,
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lockType: 1 /* LockType.KNOCK */,
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});
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// RETURNS
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++this.writing_;
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return [2 /*return*/, true];
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});
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});
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};
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/**
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* @inheritDoc
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*/
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SharedTimedMutex.prototype.try_lock_for = function (ms) {
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var _this = this;
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return new Promise(function (resolve) {
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// CONSTRUCT RESOLVER
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var it = _this.queue_.insert(_this.queue_.end(), {
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handler: _this.writing_++ === 0 && _this.reading_ === 0
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? null
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: resolve,
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accessType: 0 /* AccessType.WRITE */,
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lockType: 1 /* LockType.KNOCK */,
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});
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if (it.value.handler === null)
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resolve(true); // SUCCESS
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else {
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// AUTOMATIC UNLOCK AFTER TIMEOUT
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(0, global_1.sleep_for)(ms).then(function () {
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// NOT YET, THEN DO UNLOCK
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if (it.value.handler !== null) {
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--_this.writing_;
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_this._Cancel(it);
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}
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});
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}
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});
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};
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/**
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* @inheritDoc
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*/
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SharedTimedMutex.prototype.try_lock_until = function (at) {
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return __awaiter(this, void 0, void 0, function () {
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var now, ms;
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return __generator(this, function (_a) {
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switch (_a.label) {
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case 0:
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now = new Date();
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ms = at.getTime() - now.getTime();
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return [4 /*yield*/, this.try_lock_for(ms)];
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case 1: return [2 /*return*/, _a.sent()];
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}
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});
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});
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};
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/**
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* @inheritDoc
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*/
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SharedTimedMutex.prototype.unlock = function () {
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return __awaiter(this, void 0, void 0, function () {
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return __generator(this, function (_a) {
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if (this._Current_access_type() !== 0 /* AccessType.WRITE */)
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throw new InvalidArgument_1.InvalidArgument("Error on std.".concat(this.source_.constructor.name, ".unlock(): this mutex is free on the unique lock."));
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--this.writing_;
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this.queue_.pop_front();
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this._Release();
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return [2 /*return*/];
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});
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});
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};
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/* ---------------------------------------------------------
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READ LOCK
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--------------------------------------------------------- */
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/**
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* @inheritDoc
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*/
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SharedTimedMutex.prototype.lock_shared = function () {
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var _this = this;
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return new Promise(function (resolve) {
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var resolver = {
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handler: _this.writing_ === 0 ? null : resolve,
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accessType: 1 /* AccessType.READ */,
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lockType: 0 /* LockType.HOLD */,
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};
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_this.queue_.push_back(resolver);
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++_this.reading_;
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if (resolver.handler === null)
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resolve();
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});
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};
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/**
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* @inheritDoc
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*/
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SharedTimedMutex.prototype.try_lock_shared = function () {
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return __awaiter(this, void 0, void 0, function () {
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return __generator(this, function (_a) {
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if (this.writing_ !== 0)
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return [2 /*return*/, false];
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++this.reading_;
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this.queue_.push_back({
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handler: null,
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accessType: 1 /* AccessType.READ */,
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lockType: 1 /* LockType.KNOCK */,
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});
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return [2 /*return*/, true];
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});
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});
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};
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/**
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* @inheritDoc
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*/
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SharedTimedMutex.prototype.try_lock_shared_for = function (ms) {
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var _this = this;
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return new Promise(function (resolve) {
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// CONSTRUCT RESOLVER
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var it = _this.queue_.insert(_this.queue_.end(), {
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handler: _this.writing_ === 0 ? null : resolve,
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accessType: 1 /* AccessType.READ */,
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lockType: 1 /* LockType.KNOCK */,
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});
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++_this.reading_;
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if (it.value.handler === null)
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resolve(true);
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else {
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// AUTOMATIC UNLOCK AFTER TIMEOUT
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(0, global_1.sleep_for)(ms).then(function () {
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// NOT YET, THEN DO UNLOCK
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if (it.value.handler !== null) {
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--_this.reading_;
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_this._Cancel(it);
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}
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});
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}
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});
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};
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/**
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* @inheritDoc
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*/
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SharedTimedMutex.prototype.try_lock_shared_until = function (at) {
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return __awaiter(this, void 0, void 0, function () {
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var now, ms;
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return __generator(this, function (_a) {
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switch (_a.label) {
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case 0:
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now = new Date();
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ms = at.getTime() - now.getTime();
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return [4 /*yield*/, this.try_lock_shared_for(ms)];
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case 1: return [2 /*return*/, _a.sent()];
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}
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});
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});
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};
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/**
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* @inheritDoc
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*/
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SharedTimedMutex.prototype.unlock_shared = function () {
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return __awaiter(this, void 0, void 0, function () {
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return __generator(this, function (_a) {
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if (this._Current_access_type() !== 1 /* AccessType.READ */)
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throw new InvalidArgument_1.InvalidArgument("Error on std.".concat(this.source_.constructor.name, ".unlock_shared(): this mutex is free on the shared lock."));
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--this.reading_;
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this.queue_.pop_front();
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this._Release();
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return [2 /*return*/];
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});
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});
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};
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/* ---------------------------------------------------------
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RELEASE
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--------------------------------------------------------- */
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SharedTimedMutex.prototype._Release = function () {
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var e_1, _a, e_2, _b;
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// STEP TO THE NEXT LOCKS
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var current = this._Current_access_type();
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var resolverList = [];
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try {
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for (var _c = __values(this.queue_), _d = _c.next(); !_d.done; _d = _c.next()) {
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var resolver = _d.value;
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// DIFFERENT ACCESS TYPE COMES?
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if (resolver.accessType !== current)
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break;
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// COPY AND CLEAR
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else if (resolver.handler !== null) {
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resolverList.push(__assign({}, resolver));
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resolver.handler = null;
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}
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// STOP AFTER WRITE LOCK
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if (resolver.accessType === 0 /* AccessType.WRITE */)
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break;
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}
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}
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catch (e_1_1) { e_1 = { error: e_1_1 }; }
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finally {
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try {
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if (_d && !_d.done && (_a = _c.return)) _a.call(_c);
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}
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finally { if (e_1) throw e_1.error; }
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}
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try {
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// CALL THE HANDLERS
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for (var resolverList_1 = __values(resolverList), resolverList_1_1 = resolverList_1.next(); !resolverList_1_1.done; resolverList_1_1 = resolverList_1.next()) {
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var resolver = resolverList_1_1.value;
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if (resolver.lockType === 0 /* LockType.HOLD */)
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resolver.handler();
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else
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resolver.handler(true);
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}
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}
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catch (e_2_1) { e_2 = { error: e_2_1 }; }
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finally {
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try {
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if (resolverList_1_1 && !resolverList_1_1.done && (_b = resolverList_1.return)) _b.call(resolverList_1);
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}
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finally { if (e_2) throw e_2.error; }
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}
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};
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SharedTimedMutex.prototype._Cancel = function (it) {
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//----
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// POP THE RELEASE
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//----
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// DO RASE
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this.queue_.erase(it);
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// EXTRACT HANDLER TO AVOID THE `this._Release()`
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var handler = it.value.handler;
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it.value.handler = null;
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//----
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// POST-PROCESS
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//----
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// CHECK THE PREVIOUS RESOLVER
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var prev = it.prev();
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// RELEASE IF IT IS THE LASTEST RESOLVER
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if (prev.equals(this.queue_.end()) === false &&
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prev.value.handler === null)
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this._Release();
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// (LAZY) RETURNS FAILURE
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handler(false);
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};
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return SharedTimedMutex;
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}());
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exports.SharedTimedMutex = SharedTimedMutex;
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//# sourceMappingURL=SharedTimedMutex.js.map
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Reference in New Issue
Block a user