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Diffstat (limited to 'node_modules/bluebird/js/main/using.js')
-rw-r--r-- | node_modules/bluebird/js/main/using.js | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/node_modules/bluebird/js/main/using.js b/node_modules/bluebird/js/main/using.js new file mode 100644 index 000000000..40387117b --- /dev/null +++ b/node_modules/bluebird/js/main/using.js @@ -0,0 +1,202 @@ +"use strict"; +module.exports = function (Promise, apiRejection, tryConvertToPromise, + createContext) { + var TypeError = require("./errors.js").TypeError; + var inherits = require("./util.js").inherits; + var PromiseInspection = Promise.PromiseInspection; + + function inspectionMapper(inspections) { + var len = inspections.length; + for (var i = 0; i < len; ++i) { + var inspection = inspections[i]; + if (inspection.isRejected()) { + return Promise.reject(inspection.error()); + } + inspections[i] = inspection._settledValue; + } + return inspections; + } + + 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 = Promise.defer(); + function iterator() { + if (i >= len) return ret.resolve(); + 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.promise; + } + + function disposerSuccess(value) { + var inspection = new PromiseInspection(); + inspection._settledValue = value; + inspection._bitField = 268435456; + return dispose(this, inspection).thenReturn(value); + } + + function disposerFail(reason) { + var inspection = new PromiseInspection(); + inspection._settledValue = reason; + inspection._bitField = 134217728; + return dispose(this, inspection).thenThrow(reason); + } + + 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; + } + + 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("fn must be a function\u000a\u000a See http://goo.gl/916lJJ\u000a"); + len--; + var resources = new Array(len); + for (var i = 0; i < len; ++i) { + var resource = arguments[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 promise = Promise.settle(resources) + .then(inspectionMapper) + .then(function(vals) { + promise._pushContext(); + var ret; + try { + ret = fn.apply(undefined, vals); + } finally { + promise._popContext(); + } + return ret; + }) + ._then( + disposerSuccess, disposerFail, undefined, resources, undefined); + resources.promise = promise; + return promise; + }; + + Promise.prototype._setDisposable = function (disposer) { + this._bitField = this._bitField | 262144; + this._disposer = disposer; + }; + + Promise.prototype._isDisposable = function () { + return (this._bitField & 262144) > 0; + }; + + Promise.prototype._getDisposer = function () { + return this._disposer; + }; + + Promise.prototype._unsetDisposable = function () { + this._bitField = this._bitField & (~262144); + this._disposer = undefined; + }; + + Promise.prototype.disposer = function (fn) { + if (typeof fn === "function") { + return new FunctionDisposer(fn, this, createContext()); + } + throw new TypeError(); + }; + +}; |