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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Jetpack.
*
* The Initial Developer of the Original Code is Mozilla.
* Portions created by the Initial Developer are Copyright (C) 2007
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Atul Varma <atul@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
// TODO: Consider adding all this to the unload module.
var unloaders = [];
var addMethod = exports.addMethod = function addMethod(obj, unloader) {
var called = false;
function unloadWrapper() {
if (!called) {
called = true;
var index = unloaders.indexOf(unloadWrapper);
if (index == -1)
throw new Error("assertion failure");
unloaders.splice(index, 1);
unloader.apply(obj, []);
}
};
unloaders.push(unloadWrapper);
obj.unload = unloadWrapper;
};
var ensure = exports.ensure = function ensure(obj) {
if (!("unload" in obj))
throw new Error("object has no 'unload' property");
addMethod(obj, obj.unload);
};
require("unload").when(
function() {
unloaders.slice().forEach(
function(unloadWrapper) {
unloadWrapper();
});
});
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