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_SOURCE_LIST_STL_H_
12 #define WEBRTC_SYSTEM_WRAPPERS_SOURCE_LIST_STL_H_
13 
14 #include <list>
15 
16 #include "constructor_magic.h"
17 
18 namespace webrtc {
19 class ListItem
20 {
21 friend class ListWrapper;
22 
23 public:
24     ListItem(const void* ptr);
25     ListItem(const unsigned int item);
26     virtual ~ListItem();
27     void* GetItem() const;
28     unsigned int GetUnsignedItem() const;
29 
30 private:
31     mutable std::list<ListItem*>::iterator this_iter_;
32     const void*         item_ptr_;
33     const unsigned int  item_;
34     DISALLOW_COPY_AND_ASSIGN(ListItem);
35 };
36 
37 class ListWrapper
38 {
39 public:
40     ListWrapper();
41     ~ListWrapper();
42 
43     // ListWrapper functions
44     unsigned int GetSize() const;
45     int PushBack(const void* ptr);
46     int PushBack(const unsigned int item_id);
47     int PushFront(const void* ptr);
48     int PushFront(const unsigned int item_id);
49     int PopFront();
50     int PopBack();
51     bool Empty() const;
52     ListItem* First() const;
53     ListItem* Last() const;
54     ListItem* Next(ListItem* item) const;
55     ListItem* Previous(ListItem* item) const;
56     int Erase(ListItem* item);
57     int Insert(ListItem* existing_previous_item, ListItem* new_item);
58     int InsertBefore(ListItem* existing_next_item, ListItem* new_item);
59 
60 private:
61     mutable std::list<ListItem*> list_;
62     DISALLOW_COPY_AND_ASSIGN(ListWrapper);
63 };
64 } // namespace webrtc
65 
66 #endif // WEBRTC_SYSTEM_WRAPPERS_SOURCE_LIST_STL_H_
67