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lib: refactor internal/linkedlist

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PR-URL: https://github.com/nodejs/node/pull/11406
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
This commit is contained in:
James M Snell 2017-02-15 13:33:33 -08:00
parent ca48071919
commit d61a511728
1 changed files with 10 additions and 11 deletions
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21
lib/internal/linkedlist.js
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@ -4,7 +4,6 @@ function init(list) {
list._idleNext = list; list._idleNext = list;
list._idlePrev = list; list._idlePrev = list;
} }
exports.init = init;
// create a new linked list // create a new linked list
function create() { function create() {
@ -12,15 +11,12 @@ function create() {
init(list); init(list);
return list; return list;
} }
exports.create = create;
// show the most idle item // show the most idle item
function peek(list) { function peek(list) {
if (list._idlePrev === list) return null; if (list._idlePrev === list) return null;
return list._idlePrev; return list._idlePrev;
} }
exports.peek = peek;
// remove the most idle item from the list // remove the most idle item from the list
function shift(list) { function shift(list) {
@ -28,8 +24,6 @@ function shift(list) {
remove(first); remove(first);
return first; return first;
} }
exports.shift = shift;
// remove a item from its list // remove a item from its list
function remove(item) { function remove(item) {
@ -44,8 +38,6 @@ function remove(item) {
item._idleNext = null; item._idleNext = null;
item._idlePrev = null; item._idlePrev = null;
} }
exports.remove = remove;
// remove a item from its list and place at the end. // remove a item from its list and place at the end.
function append(list, item) { function append(list, item) {
@ -62,10 +54,17 @@ function append(list, item) {
list._idleNext._idlePrev = item; list._idleNext._idlePrev = item;
list._idleNext = item; list._idleNext = item;
} }
exports.append = append;
function isEmpty(list) { function isEmpty(list) {
return list._idleNext === list; return list._idleNext === list;
} }
exports.isEmpty = isEmpty;
module.exports = {
init,
create,
peek,
shift,
remove,
append,
isEmpty
};