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