1 /*
2  *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 #ifndef WEBRTC_SYSTEM_WRAPPERS_INTERFACE_MAP_WRAPPER_H_
12 #define WEBRTC_SYSTEM_WRAPPERS_INTERFACE_MAP_WRAPPER_H_
13 
14 #include <map>
15 
16 #include "constructor_magic.h"
17 
18 namespace webrtc {
19 class MapItem
20 {
21 friend class MapWrapper;
22 
23 public:
24     MapItem(int id, void* ptr);
25     virtual ~MapItem();
26     void* GetItem();
27     int GetId();
28     unsigned int GetUnsignedId();
29     void SetItem(void* ptr);
30 
31 private:
32     int   item_id_;
33     void* item_pointer_;
34 };
35 
36 class MapWrapper
37 {
38 public:
39     MapWrapper();
40     ~MapWrapper();
41 
42     // Puts a pointer to anything in the map and associates it with id. Note, id
43     // needs to be unique for all items in the map.
44     int Insert(int id, void* ptr);
45 
46     // Removes item from map.
47     int Erase(MapItem* item);
48 
49     // Finds item with associated with id and removes it from the map.
50     int Erase(int id);
51 
52     // Returns the number of elements stored in the map.
53     int Size() const;
54 
55     // Returns a pointer to the first MapItem in the map.
56     MapItem* First() const;
57 
58     // Returns a pointer to the last MapItem in the map.
59     MapItem* Last() const;
60 
61     // Returns a pointer to the MapItem stored after item in the map.
62     MapItem* Next(MapItem* item) const;
63 
64     // Returns a pointer to the MapItem stored before item in the map.
65     MapItem* Previous(MapItem* item) const;
66 
67     // Returns a pointer to the MapItem associated with id from the map.
68     MapItem* Find(int id) const;
69 
70 private:
71     std::map<int, MapItem*>    map_;
72 };
73 } // namespace webrtc
74 
75 #endif  // WEBRTC_SYSTEM_WRAPPERS_INTERFACE_MAP_WRAPPER_H_
76