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36 lines
941 B
36 lines
941 B
5 years ago
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var Q = require("./q");
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module.exports = Queue;
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function Queue() {
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var ends = Q.defer();
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var closed = Q.defer();
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return {
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put: function (value) {
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var next = Q.defer();
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ends.resolve({
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head: value,
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tail: next.promise
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});
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ends.resolve = next.resolve;
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},
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get: function () {
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var result = ends.promise.get("head");
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ends.promise = ends.promise.get("tail");
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return result.fail(function (error) {
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closed.resolve(error);
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throw error;
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});
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},
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closed: closed.promise,
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close: function (error) {
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error = error || new Error("Can't get value from closed queue");
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var end = {head: Q.reject(error)};
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end.tail = end;
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ends.resolve(end);
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return closed.promise;
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}
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};
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}
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