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files >> //proc/self/root/usr/lib/node_modules/npm/node_modules/bluebird/js/release/using.js
"use strict"; module.exports = function (Promise, apiRejection, tryConvertToPromise, createContext, INTERNAL, debug) { var util = require("./util"); var TypeError = require("./errors").TypeError; var inherits = require("./util").inherits; var errorObj = util.errorObj; var tryCatch = util.tryCatch; var NULL = {}; function thrower(e) { setTimeout(function(){throw e;}, 0); } function castPreservingDisposable(thenable) { var maybePromise = tryConvertToPromise(thenable); if (maybePromise !== thenable && typeof thenable._isDisposable === "function" && typeof thenable._getDisposer === "function" && thenable._isDisposable()) { maybePromise._setDisposable(thenable._getDisposer()); } return maybePromise; } function dispose(resources, inspection) { var i = 0; var len = resources.length; var ret = new Promise(INTERNAL); function iterator() { if (i >= len) return ret._fulfill(); var maybePromise = castPreservingDisposable(resources[i++]); if (maybePromise instanceof Promise && maybePromise._isDisposable()) { try { maybePromise = tryConvertToPromise( maybePromise._getDisposer().tryDispose(inspection), resources.promise); } catch (e) { return thrower(e); } if (maybePromise instanceof Promise) { return maybePromise._then(iterator, thrower, null, null, null); } } iterator(); } iterator(); return ret; } function Disposer(data, promise, context) { this._data = data; this._promise = promise; this._context = context; } Disposer.prototype.data = function () { return this._data; }; Disposer.prototype.promise = function () { return this._promise; }; Disposer.prototype.resource = function () { if (this.promise().isFulfilled()) { return this.promise().value(); } return NULL; }; Disposer.prototype.tryDispose = function(inspection) { var resource = this.resource(); var context = this._context; if (context !== undefined) context._pushContext(); var ret = resource !== NULL ? this.doDispose(resource, inspection) : null; if (context !== undefined) context._popContext(); this._promise._unsetDisposable(); this._data = null; return ret; }; Disposer.isDisposer = function (d) { return (d != null && typeof d.resource === "function" && typeof d.tryDispose === "function"); }; function FunctionDisposer(fn, promise, context) { this.constructor$(fn, promise, context); } inherits(FunctionDisposer, Disposer); FunctionDisposer.prototype.doDispose = function (resource, inspection) { var fn = this.data(); return fn.call(resource, resource, inspection); }; function maybeUnwrapDisposer(value) { if (Disposer.isDisposer(value)) { this.resources[this.index]._setDisposable(value); return value.promise(); } return value; } function ResourceList(length) { this.length = length; this.promise = null; this[length-1] = null; } ResourceList.prototype._resultCancelled = function() { var len = this.length; for (var i = 0; i < len; ++i) { var item = this[i]; if (item instanceof Promise) { item.cancel(); } } }; Promise.using = function () { var len = arguments.length; if (len < 2) return apiRejection( "you must pass at least 2 arguments to Promise.using"); var fn = arguments[len - 1]; if (typeof fn !== "function") { return apiRejection("expecting a function but got " + util.classString(fn)); } var input; var spreadArgs = true; if (len === 2 && Array.isArray(arguments[0])) { input = arguments[0]; len = input.length; spreadArgs = false; } else { input = arguments; len--; } var resources = new ResourceList(len); for (var i = 0; i < len; ++i) { var resource = input[i]; if (Disposer.isDisposer(resource)) { var disposer = resource; resource = resource.promise(); resource._setDisposable(disposer); } else { var maybePromise = tryConvertToPromise(resource); if (maybePromise instanceof Promise) { resource = maybePromise._then(maybeUnwrapDisposer, null, null, { resources: resources, index: i }, undefined); } } resources[i] = resource; } var reflectedResources = new Array(resources.length); for (var i = 0; i < reflectedResources.length; ++i) { reflectedResources[i] = Promise.resolve(resources[i]).reflect(); } var resultPromise = Promise.all(reflectedResources) .then(function(inspections) { for (var i = 0; i < inspections.length; ++i) { var inspection = inspections[i]; if (inspection.isRejected()) { errorObj.e = inspection.error(); return errorObj; } else if (!inspection.isFulfilled()) { resultPromise.cancel(); return; } inspections[i] = inspection.value(); } promise._pushContext(); fn = tryCatch(fn); var ret = spreadArgs ? fn.apply(undefined, inspections) : fn(inspections); var promiseCreated = promise._popContext(); debug.checkForgottenReturns( ret, promiseCreated, "Promise.using", promise); return ret; }); var promise = resultPromise.lastly(function() { var inspection = new Promise.PromiseInspection(resultPromise); return dispose(resources, inspection); }); resources.promise = promise; promise._setOnCancel(resources); return promise; }; Promise.prototype._setDisposable = function (disposer) { this._bitField = this._bitField | 131072; this._disposer = disposer; }; Promise.prototype._isDisposable = function () { return (this._bitField & 131072) > 0; }; Promise.prototype._getDisposer = function () { return this._disposer; }; Promise.prototype._unsetDisposable = function () { this._bitField = this._bitField & (~131072); this._disposer = undefined; }; Promise.prototype.disposer = function (fn) { if (typeof fn === "function") { return new FunctionDisposer(fn, this, createContext()); } throw new TypeError(); }; };
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