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Diffstat (limited to 'node_modules/bluebird/js/main/async.js')
-rw-r--r-- | node_modules/bluebird/js/main/async.js | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/node_modules/bluebird/js/main/async.js b/node_modules/bluebird/js/main/async.js new file mode 100644 index 000000000..917e321ff --- /dev/null +++ b/node_modules/bluebird/js/main/async.js @@ -0,0 +1,209 @@ +"use strict"; +var firstLineError; +try {throw new Error(); } catch (e) {firstLineError = e;} +var schedule = require("./schedule.js"); +var Queue = require("./queue.js"); +var util = require("./util.js"); + +function Async() { + this._isTickUsed = false; + this._lateQueue = new Queue(16); + this._normalQueue = new Queue(16); + this._trampolineEnabled = true; + var self = this; + this.drainQueues = function () { + self._drainQueues(); + }; + this._schedule = + schedule.isStatic ? schedule(this.drainQueues) : schedule; +} + +Async.prototype.disableTrampolineIfNecessary = function() { + if (util.hasDevTools) { + this._trampolineEnabled = false; + } +}; + +Async.prototype.enableTrampoline = function() { + if (!this._trampolineEnabled) { + this._trampolineEnabled = true; + this._schedule = function(fn) { + setTimeout(fn, 0); + }; + } +}; + +Async.prototype.haveItemsQueued = function () { + return this._normalQueue.length() > 0; +}; + +Async.prototype.throwLater = function(fn, arg) { + if (arguments.length === 1) { + arg = fn; + fn = function () { throw arg; }; + } + var domain = this._getDomain(); + if (domain !== undefined) fn = domain.bind(fn); + if (typeof setTimeout !== "undefined") { + setTimeout(function() { + fn(arg); + }, 0); + } else try { + this._schedule(function() { + fn(arg); + }); + } catch (e) { + throw new Error("No async scheduler available\u000a\u000a See http://goo.gl/m3OTXk\u000a"); + } +}; + +Async.prototype._getDomain = function() {}; + +if (!false) { +if (util.isNode) { + var EventsModule = require("events"); + + var domainGetter = function() { + var domain = process.domain; + if (domain === null) return undefined; + return domain; + }; + + if (EventsModule.usingDomains) { + Async.prototype._getDomain = domainGetter; + } else { + var descriptor = + Object.getOwnPropertyDescriptor(EventsModule, "usingDomains"); + + if (descriptor) { + if (!descriptor.configurable) { + process.on("domainsActivated", function() { + Async.prototype._getDomain = domainGetter; + }); + } else { + var usingDomains = false; + Object.defineProperty(EventsModule, "usingDomains", { + configurable: false, + enumerable: true, + get: function() { + return usingDomains; + }, + set: function(value) { + if (usingDomains || !value) return; + usingDomains = true; + Async.prototype._getDomain = domainGetter; + util.toFastProperties(process); + process.emit("domainsActivated"); + } + }); + } + } + } +} +} + +function AsyncInvokeLater(fn, receiver, arg) { + var domain = this._getDomain(); + if (domain !== undefined) fn = domain.bind(fn); + this._lateQueue.push(fn, receiver, arg); + this._queueTick(); +} + +function AsyncInvoke(fn, receiver, arg) { + var domain = this._getDomain(); + if (domain !== undefined) fn = domain.bind(fn); + this._normalQueue.push(fn, receiver, arg); + this._queueTick(); +} + +function AsyncSettlePromises(promise) { + var domain = this._getDomain(); + if (domain !== undefined) { + var fn = domain.bind(promise._settlePromises); + this._normalQueue.push(fn, promise, undefined); + } else { + this._normalQueue._pushOne(promise); + } + this._queueTick(); +} + +if (!util.hasDevTools) { + Async.prototype.invokeLater = AsyncInvokeLater; + Async.prototype.invoke = AsyncInvoke; + Async.prototype.settlePromises = AsyncSettlePromises; +} else { + if (schedule.isStatic) { + schedule = function(fn) { setTimeout(fn, 0); }; + } + Async.prototype.invokeLater = function (fn, receiver, arg) { + if (this._trampolineEnabled) { + AsyncInvokeLater.call(this, fn, receiver, arg); + } else { + this._schedule(function() { + setTimeout(function() { + fn.call(receiver, arg); + }, 100); + }); + } + }; + + Async.prototype.invoke = function (fn, receiver, arg) { + if (this._trampolineEnabled) { + AsyncInvoke.call(this, fn, receiver, arg); + } else { + this._schedule(function() { + fn.call(receiver, arg); + }); + } + }; + + Async.prototype.settlePromises = function(promise) { + if (this._trampolineEnabled) { + AsyncSettlePromises.call(this, promise); + } else { + this._schedule(function() { + promise._settlePromises(); + }); + } + }; +} + +Async.prototype.invokeFirst = function (fn, receiver, arg) { + var domain = this._getDomain(); + if (domain !== undefined) fn = domain.bind(fn); + this._normalQueue.unshift(fn, receiver, arg); + this._queueTick(); +}; + +Async.prototype._drainQueue = function(queue) { + while (queue.length() > 0) { + var fn = queue.shift(); + if (typeof fn !== "function") { + fn._settlePromises(); + continue; + } + var receiver = queue.shift(); + var arg = queue.shift(); + fn.call(receiver, arg); + } +}; + +Async.prototype._drainQueues = function () { + this._drainQueue(this._normalQueue); + this._reset(); + this._drainQueue(this._lateQueue); +}; + +Async.prototype._queueTick = function () { + if (!this._isTickUsed) { + this._isTickUsed = true; + this._schedule(this.drainQueues); + } +}; + +Async.prototype._reset = function () { + this._isTickUsed = false; +}; + +module.exports = new Async(); +module.exports.firstLineError = firstLineError; 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