- add sources.
[platform/framework/web/crosswalk.git] / src / components / visitedlink / renderer / visitedlink_slave.h
1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef COMPONENTS_VISITEDLINK_RENDERER_VISITEDLINK_SLAVE_H_
6 #define COMPONENTS_VISITEDLINK_RENDERER_VISITEDLINK_SLAVE_H_
7
8 #include "base/compiler_specific.h"
9 #include "base/memory/shared_memory.h"
10 #include "components/visitedlink/common/visitedlink_common.h"
11 #include "content/public/renderer/render_process_observer.h"
12
13 namespace visitedlink {
14
15 // Reads the link coloring database provided by the master. There can be any
16 // number of slaves reading the same database.
17 class VisitedLinkSlave : public VisitedLinkCommon,
18                          public content::RenderProcessObserver {
19  public:
20   VisitedLinkSlave();
21   virtual ~VisitedLinkSlave();
22
23   // RenderProcessObserver implementation.
24   virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;
25
26   // Message handlers.
27   void OnUpdateVisitedLinks(base::SharedMemoryHandle table);
28   void OnAddVisitedLinks(const VisitedLinkSlave::Fingerprints& fingerprints);
29   void OnResetVisitedLinks();
30
31  private:
32   void FreeTable();
33
34   // shared memory consists of a SharedHeader followed by the table
35   base::SharedMemory* shared_memory_;
36
37   DISALLOW_COPY_AND_ASSIGN(VisitedLinkSlave);
38 };
39
40 }  // namespace visitedlink
41
42 #endif  // COMPONENTS_VISITEDLINK_RENDERER_VISITEDLINK_SLAVE_H_