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Diffstat (limited to 'node_modules/bluebird/js/release/using.js')
-rw-r--r-- | node_modules/bluebird/js/release/using.js | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/node_modules/bluebird/js/release/using.js b/node_modules/bluebird/js/release/using.js new file mode 100644 index 000000000..65de531c1 --- /dev/null +++ b/node_modules/bluebird/js/release/using.js @@ -0,0 +1,226 @@ +"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(); + }; + +}; |