108 lines
3.8 KiB
JavaScript
108 lines
3.8 KiB
JavaScript
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"use strict";
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module.exports =
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function(Promise, PromiseArray, tryConvertToPromise, INTERNAL) {
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var util = require("./util.js");
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var canEvaluate = util.canEvaluate;
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var tryCatch = util.tryCatch;
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var errorObj = util.errorObj;
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var reject;
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if (!false) {
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if (canEvaluate) {
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var thenCallback = function(i) {
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return new Function("value", "holder", " \n\
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'use strict'; \n\
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holder.pIndex = value; \n\
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holder.checkFulfillment(this); \n\
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".replace(/Index/g, i));
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};
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var caller = function(count) {
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var values = [];
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for (var i = 1; i <= count; ++i) values.push("holder.p" + i);
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return new Function("holder", " \n\
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'use strict'; \n\
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var callback = holder.fn; \n\
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return callback(values); \n\
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".replace(/values/g, values.join(", ")));
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};
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var thenCallbacks = [];
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var callers = [undefined];
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for (var i = 1; i <= 5; ++i) {
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thenCallbacks.push(thenCallback(i));
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callers.push(caller(i));
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}
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var Holder = function(total, fn) {
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this.p1 = this.p2 = this.p3 = this.p4 = this.p5 = null;
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this.fn = fn;
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this.total = total;
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this.now = 0;
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};
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Holder.prototype.callers = callers;
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Holder.prototype.checkFulfillment = function(promise) {
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var now = this.now;
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now++;
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var total = this.total;
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if (now >= total) {
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var handler = this.callers[total];
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promise._pushContext();
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var ret = tryCatch(handler)(this);
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promise._popContext();
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if (ret === errorObj) {
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promise._rejectCallback(ret.e, false, true);
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} else {
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promise._resolveCallback(ret);
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}
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} else {
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this.now = now;
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}
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};
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var reject = function (reason) {
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this._reject(reason);
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};
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}
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}
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Promise.join = function () {
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var last = arguments.length - 1;
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var fn;
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if (last > 0 && typeof arguments[last] === "function") {
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fn = arguments[last];
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if (!false) {
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if (last < 6 && canEvaluate) {
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var ret = new Promise(INTERNAL);
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ret._captureStackTrace();
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var holder = new Holder(last, fn);
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var callbacks = thenCallbacks;
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for (var i = 0; i < last; ++i) {
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var maybePromise = tryConvertToPromise(arguments[i], ret);
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if (maybePromise instanceof Promise) {
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maybePromise = maybePromise._target();
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if (maybePromise._isPending()) {
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maybePromise._then(callbacks[i], reject,
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undefined, ret, holder);
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} else if (maybePromise._isFulfilled()) {
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callbacks[i].call(ret,
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maybePromise._value(), holder);
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} else {
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ret._reject(maybePromise._reason());
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}
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} else {
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callbacks[i].call(ret, maybePromise, holder);
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}
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}
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return ret;
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}
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}
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}
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var $_len = arguments.length;var args = new Array($_len); for(var $_i = 0; $_i < $_len; ++$_i) {args[$_i] = arguments[$_i];}
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if (fn) args.pop();
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var ret = new PromiseArray(args).promise();
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return fn !== undefined ? ret.spread(fn) : ret;
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};
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};
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