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Add clearTimeout() implementation to Bluebird

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Necessary for cancellable promises
This commit is contained in:
Dan Stillman 2015-05-10 02:41:47 -04:00
parent 03da4a9d52
commit aa70e60fc6
1 changed files with 46 additions and 39 deletions
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25
resource/bluebird.js
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@ -35,19 +35,19 @@
// Set BackstagePass (which contains .Error, etc.) as global object // Set BackstagePass (which contains .Error, etc.) as global object
self = this; self = this;
// Provide an implementation of setTimeout
self.setTimeout = new function() {
// We need to maintain references to running nsITimers. Otherwise, they can // We need to maintain references to running nsITimers. Otherwise, they can
// get garbage collected before they fire. // get garbage collected before they fire. Also, we might need to cancel them.
var _runningTimers = []; var _runningTimers = {};
return function setTimeout(func, ms) { // Provide an implementation of setTimeout
self.setTimeout = function (func, ms) {
var id = Math.floor(Math.random() * (1000000000000 - 1)) + 1
var useMethodjit = Components.utils.methodjit; var useMethodjit = Components.utils.methodjit;
var timer = Components.classes["@mozilla.org/timer;1"] var timer = Components.classes["@mozilla.org/timer;1"]
.createInstance(Components.interfaces.nsITimer); .createInstance(Components.interfaces.nsITimer);
timer.initWithCallback({"notify":function() { timer.initWithCallback({"notify":function() {
// Remove timer from array so it can be garbage collected // Remove timer from object so it can be garbage collected
_runningTimers.splice(_runningTimers.indexOf(timer), 1); delete _runningTimers[id];
// Execute callback function // Execute callback function
try { try {
@ -73,9 +73,16 @@
self.debug(err.stack, 1); self.debug(err.stack, 1);
} }
}}, ms, Components.interfaces.nsITimer.TYPE_ONE_SHOT); }}, ms, Components.interfaces.nsITimer.TYPE_ONE_SHOT);
_runningTimers.push(timer); _runningTimers[id] = timer;
} return id;
}; };
self.clearTimeout = function (id) {
var timer = _runningTimers[id];
if (timer) {
timer.cancel();
}
delete _runningTimers[id];
}
self.debug = function (msg) { self.debug = function (msg) {
dump(msg + "\n\n"); dump(msg + "\n\n");