Branch CEF3 files from /branches/cef3 to /trunk/cef3 (issue #564).

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@571 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/common/tracker.cc

@@ -0,0 +1,83 @@
+// Copyright (c) 2012 The Chromium Embedded Framework Authors. All rights
+// reserved. Use of this source code is governed by a BSD-style license that
+// can be found in the LICENSE file.
+
+#include "libcef/common/tracker.h"
+
+// CefTrackNode implementation.
+
+CefTrackNode::CefTrackNode()
+  : track_next_(NULL),
+    track_prev_(NULL) {
+}
+
+CefTrackNode::~CefTrackNode() {
+}
+
+void CefTrackNode::InsertTrackPrev(CefTrackNode* object) {
+  if (track_prev_)
+    track_prev_->SetTrackNext(object);
+  object->SetTrackNext(this);
+  object->SetTrackPrev(track_prev_);
+  track_prev_ = object;
+}
+
+void CefTrackNode::InsertTrackNext(CefTrackNode* object) {
+  if (track_next_)
+    track_next_->SetTrackPrev(object);
+  object->SetTrackPrev(this);
+  object->SetTrackNext(track_next_);
+  track_next_ = object;
+}
+
+void CefTrackNode::RemoveTracking() {
+  if (track_next_)
+    track_next_->SetTrackPrev(track_prev_);
+  if (track_prev_)
+    track_prev_->SetTrackNext(track_next_);
+  track_next_ = NULL;
+  track_prev_ = NULL;
+}
+
+
+// CefTrackManager implementation.
+
+CefTrackManager::CefTrackManager()
+  : object_count_(0) {
+}
+
+CefTrackManager::~CefTrackManager() {
+  DeleteAll();
+}
+
+void CefTrackManager::Add(CefTrackNode* object) {
+  AutoLock lock_scope(this);
+  if (!object->IsTracked()) {
+    tracker_.InsertTrackNext(object);
+    ++object_count_;
+  }
+}
+
+bool CefTrackManager::Delete(CefTrackNode* object) {
+  AutoLock lock_scope(this);
+  if (object->IsTracked()) {
+    object->RemoveTracking();
+    delete object;
+    --object_count_;
+    return true;
+  }
+  return false;
+}
+
+void CefTrackManager::DeleteAll() {
+  AutoLock lock_scope(this);
+  CefTrackNode* next;
+  do {
+    next = tracker_.GetTrackNext();
+    if (next) {
+      next->RemoveTracking();
+      delete next;
+    }
+  } while (next != NULL);
+  object_count_ = 0;
+}