| 1 | "use strict";
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| 2 |
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| 3 | Object.defineProperty(exports, "__esModule", {
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| 4 | value: true
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| 5 | });
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| 6 |
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| 7 | function base() {
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| 8 | return {
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| 9 | unreleased: [],
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| 10 | push: function push(put) {
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| 11 | this.unreleased.push(put);
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| 12 | },
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| 13 | shift: function shift() {
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| 14 | return this.unreleased.shift();
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| 15 | },
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| 16 | isEmpty: function isEmpty() {
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| 17 | return !this.unreleased.length;
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| 18 | }
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| 19 | };
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| 20 | }
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| 21 |
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| 22 | function fixed(limit, xduce) {
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| 23 | return {
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| 24 | unreleased: [],
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| 25 | released: [],
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| 26 | release: function release(put) {
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| 27 | this.released.push(put);
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| 28 | put.resolve(true);
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| 29 | },
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| 30 | push: function push(put) {
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| 31 | if (this.released.length === limit) {
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| 32 | this.unreleased.push(put);
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| 33 | } else {
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| 34 | this.release(put);
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| 35 | }
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| 36 | },
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| 37 | shift: function shift() {
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| 38 | if (!this.released.length) return;
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| 39 |
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| 40 | var next = this.released.shift();
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| 41 |
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| 42 | var waiting = this.unreleased.shift();
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| 43 | if (waiting) this.release(waiting);
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| 44 |
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| 45 | return next;
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| 46 | },
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| 47 | isEmpty: function isEmpty() {
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| 48 | return !this.released.length;
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| 49 | }
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| 50 | };
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| 51 | }
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| 52 |
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| 53 | function dropping(limit) {
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| 54 | return {
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| 55 | released: [],
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| 56 | push: function push(put) {
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| 57 | if (this.released.length < limit) {
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| 58 | this.released.push(put);
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| 59 | }
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| 60 | put.resolve(true);
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| 61 | },
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| 62 | shift: function shift() {
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| 63 | return this.released.shift();
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| 64 | },
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| 65 | isEmpty: function isEmpty() {
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| 66 | return !this.released.length;
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| 67 | }
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| 68 | };
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| 69 | }
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| 70 |
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| 71 | function sliding(limit) {
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| 72 | return {
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| 73 | released: [],
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| 74 | push: function push(put) {
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| 75 | if (this.released.length === limit) {
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| 76 | this.released = this.released.slice(1).concat([put]);
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| 77 | } else {
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| 78 | this.released.push(put);
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| 79 | }
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| 80 | put.resolve(true);
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| 81 | },
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| 82 | shift: function shift() {
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| 83 | return this.released.shift();
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| 84 | },
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| 85 | isEmpty: function isEmpty() {
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| 86 | return !this.released.length;
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| 87 | }
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| 88 | };
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| 89 | }
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| 90 |
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| 91 | exports.default = { base: base, fixed: fixed, dropping: dropping, sliding: sliding }; |
| \ | No newline at end of file |