1 files changed, 146 insertions, 0 deletions
diff --git a/tools/addon-sdk-1.3/packages/api-utils/lib/memory.js b/tools/addon-sdk-1.3/packages/api-utils/lib/memory.js
new file mode 100644
index 0000000..2ff0486
--- /dev/null
+++ b/tools/addon-sdk-1.3/packages/api-utils/lib/memory.js
@@ -0,0 +1,146 @@
+/* ***** 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 ***** */
+
+"use strict";
+
+const {Cc,Ci,Cu,components} = require("chrome");
+var trackedObjects = {};
+
+var Compacter = {
+  INTERVAL: 5000,
+  notify: function(timer) {
+    var newTrackedObjects = {};
+    for (let name in trackedObjects) {
+      var oldBin = trackedObjects[name];
+      var newBin = [];
+      var strongRefs = [];
+      for (var i = 0; i < oldBin.length; i++) {
+        var strongRef = oldBin[i].weakref.get();
+        if (strongRef && strongRefs.indexOf(strongRef) == -1) {
+          strongRefs.push(strongRef);
+          newBin.push(oldBin[i]);
+        }
+      }
+      if (newBin.length)
+        newTrackedObjects[name] = newBin;
+    }
+    trackedObjects = newTrackedObjects;
+  }
+};
+
+var timer = Cc["@mozilla.org/timer;1"]
+            .createInstance(Ci.nsITimer);
+
+timer.initWithCallback(Compacter,
+                       Compacter.INTERVAL,
+                       Ci.nsITimer.TYPE_REPEATING_SLACK);
+
+var track = exports.track = function track(object, bin, stackFrameNumber) {
+  var frame = components.stack.caller;
+  var weakref = Cu.getWeakReference(object);
+  if (!bin)
+    bin = object.constructor.name;
+  if (bin == "Object")
+    bin = frame.name;
+  if (!bin)
+    bin = "generic";
+  if (!(bin in trackedObjects))
+    trackedObjects[bin] = [];
+
+  if (stackFrameNumber > 0)
+    for (var i = 0; i < stackFrameNumber; i++)
+      frame = frame.caller;
+
+  trackedObjects[bin].push({weakref: weakref,
+                            created: new Date(),
+                            filename: frame.filename,
+                            lineNo: frame.lineNumber,
+                            bin: bin});
+};
+
+var getBins = exports.getBins = function getBins() {
+  var names = [];
+  for (let name in trackedObjects)
+    names.push(name);
+  return names;
+};
+
+var getObjects = exports.getObjects = function getObjects(bin) {
+  function getLiveObjectsInBin(bin, array) {
+    for (var i = 0; i < bin.length; i++) {
+      var object = bin[i].weakref.get();
+      if (object)
+        array.push(bin[i]);
+    }
+  }
+
+  var results = [];
+  if (bin) {
+    if (bin in trackedObjects)
+      getLiveObjectsInBin(trackedObjects[bin], results);
+  } else
+    for (let name in trackedObjects)
+      getLiveObjectsInBin(trackedObjects[name], results);
+  return results;
+};
+
+var gc = exports.gc = function gc() {
+  // Components.utils.forceGC() doesn't currently perform
+  // cycle collection, which means that e.g. DOM elements
+  // won't be collected by it. Fortunately, there are
+  // other ways...
+
+  var window = Cc["@mozilla.org/appshell/appShellService;1"]
+               .getService(Ci.nsIAppShellService)
+               .hiddenDOMWindow;
+  var test_utils = window.QueryInterface(Ci.nsIInterfaceRequestor)
+                   .getInterface(Ci.nsIDOMWindowUtils);
+  test_utils.garbageCollect();
+  Compacter.notify();
+
+  // Not sure why, but sometimes it appears that we don't get
+  // them all with just one CC, so let's do it again.
+  test_utils.garbageCollect();
+};
+
+require("./unload").when(
+  function() {
+    trackedObjects = {};
+    if (timer) {
+      timer.cancel();
+      timer = null;
+    }
+  });