50 lines
1.2 KiB
JavaScript
Vendored
50 lines
1.2 KiB
JavaScript
Vendored
"use strict";
|
|
module.exports = function(
|
|
Promise, INTERNAL, tryConvertToPromise, apiRejection) {
|
|
var util = require("./util");
|
|
|
|
var raceLater = function (promise) {
|
|
return promise.then(function(array) {
|
|
return race(array, promise);
|
|
});
|
|
};
|
|
|
|
function race(promises, parent) {
|
|
var maybePromise = tryConvertToPromise(promises);
|
|
|
|
if (maybePromise instanceof Promise) {
|
|
return raceLater(maybePromise);
|
|
} else {
|
|
promises = util.asArray(promises);
|
|
if (promises === null)
|
|
return apiRejection("expecting an array or an iterable object but got " + util.classString(promises));
|
|
}
|
|
|
|
var ret = new Promise(INTERNAL);
|
|
if (parent !== undefined) {
|
|
ret._propagateFrom(parent, 3);
|
|
}
|
|
var fulfill = ret._fulfill;
|
|
var reject = ret._reject;
|
|
for (var i = 0, len = promises.length; i < len; ++i) {
|
|
var val = promises[i];
|
|
|
|
if (val === undefined && !(i in promises)) {
|
|
continue;
|
|
}
|
|
|
|
Promise.cast(val)._then(fulfill, reject, undefined, ret, null);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
Promise.race = function (promises) {
|
|
return race(promises, undefined);
|
|
};
|
|
|
|
Promise.prototype.race = function () {
|
|
return race(this, undefined);
|
|
};
|
|
|
|
};
|