lazzy.ts/csp/channel.js

Fast and lightweight library for lazy operations with iterable objects.

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
    return kind === "m" ? f : kind === "a" ? f.call(receiver) : f ? f.value : state.get(receiver);
};
var __classPrivateFieldSet = (this && this.__classPrivateFieldSet) || function (receiver, state, value, kind, f) {
    if (kind === "m") throw new TypeError("Private method is not writable");
    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a setter");
    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot write private member to an object whose class did not declare it");
    return (kind === "a" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;
};
var _Channel_puts, _Channel_takes, _Channel_closed, _Channel_requestedForClose, _Channel_resolveWhenClosed, _Channel_whenClosedPromise;
Object.defineProperty(exports, "__esModule", { value: true });
exports.Channel = exports.isClosed = exports.CLOSED = void 0;
const queue_1 = require("../common/queue");
const closedSymbol = Symbol("Closed");
exports.CLOSED = {
    [closedSymbol]: true,
};
function isClosed(value) {
    return value === exports.CLOSED;
}
exports.isClosed = isClosed;
class Channel {
    constructor(...source) {
        _Channel_puts.set(this, new queue_1.Queue());
        _Channel_takes.set(this, new queue_1.Queue());
        _Channel_closed.set(this, false);
        _Channel_requestedForClose.set(this, false);
        _Channel_resolveWhenClosed.set(this, void 0);
        _Channel_whenClosedPromise.set(this, new Promise(resolve => {
            __classPrivateFieldSet(this, _Channel_resolveWhenClosed, resolve, "f");
        }));
        for (const value of source) {
            new Promise((resolvePut) => {
                __classPrivateFieldGet(this, _Channel_puts, "f").enqueue(() => {
                    resolvePut();
                    return value;
                });
            });
        }
    }
    closeChannel() {
        __classPrivateFieldSet(this, _Channel_closed, true, "f");
        if (__classPrivateFieldGet(this, _Channel_takes, "f").isNotEmpty()) {
            __classPrivateFieldGet(this, _Channel_takes, "f").dequeue()(exports.CLOSED);
        }
        if (__classPrivateFieldGet(this, _Channel_resolveWhenClosed, "f") != null) {
            __classPrivateFieldGet(this, _Channel_resolveWhenClosed, "f").call(this);
        }
    }
    close() {
        __classPrivateFieldSet(this, _Channel_requestedForClose, true, "f");
        if (__classPrivateFieldGet(this, _Channel_puts, "f").isEmpty()) {
            this.closeChannel();
        }
    }
    ;
    forceClose() {
        __classPrivateFieldSet(this, _Channel_requestedForClose, true, "f");
        this.closeChannel();
    }
    whenClosed() {
        return __classPrivateFieldGet(this, _Channel_whenClosedPromise, "f");
    }
    isClosed() {
        return __classPrivateFieldGet(this, _Channel_closed, "f");
    }
    isRequestedForClose() {
        return __classPrivateFieldGet(this, _Channel_requestedForClose, "f");
    }
    reopen() {
        __classPrivateFieldSet(this, _Channel_closed, false, "f");
        __classPrivateFieldSet(this, _Channel_requestedForClose, false, "f");
        __classPrivateFieldSet(this, _Channel_whenClosedPromise, new Promise(resolve => {
            __classPrivateFieldSet(this, _Channel_resolveWhenClosed, resolve, "f");
        }), "f");
    }
    put(value) {
        return __awaiter(this, void 0, void 0, function* () {
            if (__classPrivateFieldGet(this, _Channel_requestedForClose, "f"))
                return;
            return new Promise(resolvePut => {
                if (__classPrivateFieldGet(this, _Channel_takes, "f").isNotEmpty()) {
                    __classPrivateFieldGet(this, _Channel_takes, "f").dequeue()(value);
                    resolvePut();
                }
                else {
                    __classPrivateFieldGet(this, _Channel_puts, "f").enqueue(() => {
                        resolvePut();
                        return value;
                    });
                }
            });
        });
    }
    take() {
        return __awaiter(this, void 0, void 0, function* () {
            if (__classPrivateFieldGet(this, _Channel_closed, "f"))
                return exports.CLOSED;
            return new Promise(resolveTake => {
                if (__classPrivateFieldGet(this, _Channel_puts, "f").isNotEmpty()) {
                    resolveTake(__classPrivateFieldGet(this, _Channel_puts, "f").dequeue()());
                    if (__classPrivateFieldGet(this, _Channel_requestedForClose, "f") && __classPrivateFieldGet(this, _Channel_puts, "f").isEmpty()) {
                        this.closeChannel();
                    }
                }
                else {
                    __classPrivateFieldGet(this, _Channel_takes, "f").enqueue(resolveTake);
                }
            });
        });
    }
}
exports.Channel = Channel;
_Channel_puts = new WeakMap(), _Channel_takes = new WeakMap(), _Channel_closed = new WeakMap(), _Channel_requestedForClose = new WeakMap(), _Channel_resolveWhenClosed = new WeakMap(), _Channel_whenClosedPromise = new WeakMap();
//# sourceMappingURL=channel.js.map