76 lines
2.1 KiB
JavaScript
76 lines
2.1 KiB
JavaScript
var nextTick = require('process/browser.js').nextTick;
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var apply = Function.prototype.apply;
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var slice = Array.prototype.slice;
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var immediateIds = {};
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var nextImmediateId = 0;
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// DOM APIs, for completeness
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exports.setTimeout = function() {
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return new Timeout(apply.call(setTimeout, window, arguments), clearTimeout);
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};
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exports.setInterval = function() {
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return new Timeout(apply.call(setInterval, window, arguments), clearInterval);
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};
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exports.clearTimeout =
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exports.clearInterval = function(timeout) { timeout.close(); };
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function Timeout(id, clearFn) {
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this._id = id;
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this._clearFn = clearFn;
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}
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Timeout.prototype.unref = Timeout.prototype.ref = function() {};
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Timeout.prototype.close = function() {
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this._clearFn.call(window, this._id);
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};
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// Does not start the time, just sets up the members needed.
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exports.enroll = function(item, msecs) {
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clearTimeout(item._idleTimeoutId);
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item._idleTimeout = msecs;
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};
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exports.unenroll = function(item) {
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clearTimeout(item._idleTimeoutId);
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item._idleTimeout = -1;
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};
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exports._unrefActive = exports.active = function(item) {
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clearTimeout(item._idleTimeoutId);
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var msecs = item._idleTimeout;
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if (msecs >= 0) {
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item._idleTimeoutId = setTimeout(function onTimeout() {
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if (item._onTimeout)
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item._onTimeout();
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}, msecs);
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}
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};
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// That's not how node.js implements it but the exposed api is the same.
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exports.setImmediate = typeof setImmediate === "function" ? setImmediate : function(fn) {
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var id = nextImmediateId++;
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var args = arguments.length < 2 ? false : slice.call(arguments, 1);
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immediateIds[id] = true;
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nextTick(function onNextTick() {
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if (immediateIds[id]) {
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// fn.call() is faster so we optimize for the common use-case
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// @see http://jsperf.com/call-apply-segu
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if (args) {
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fn.apply(null, args);
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} else {
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fn.call(null);
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}
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// Prevent ids from leaking
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exports.clearImmediate(id);
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}
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});
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return id;
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};
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exports.clearImmediate = typeof clearImmediate === "function" ? clearImmediate : function(id) {
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delete immediateIds[id];
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}; |