LeechCraft  %{LEECHCRAFT_VERSION}
Modular cross-platform feature rich live environment.
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Properties Friends Macros Pages
idpool.h
Go to the documentation of this file.
1 /**********************************************************************
2  * LeechCraft - modular cross-platform feature rich internet client.
3  * Copyright (C) 2006-2013 Georg Rudoy
4  *
5  * Boost Software License - Version 1.0 - August 17th, 2003
6  *
7  * Permission is hereby granted, free of charge, to any person or organization
8  * obtaining a copy of the software and accompanying documentation covered by
9  * this license (the "Software") to use, reproduce, display, distribute,
10  * execute, and transmit the Software, and to prepare derivative works of the
11  * Software, and to permit third-parties to whom the Software is furnished to
12  * do so, all subject to the following:
13  *
14  * The copyright notices in the Software and this entire statement, including
15  * the above license grant, this restriction and the following disclaimer,
16  * must be included in all copies of the Software, in whole or in part, and
17  * all derivative works of the Software, unless such copies or derivative
18  * works are solely in the form of machine-executable object code generated by
19  * a source language processor.
20  *
21  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
22  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23  * FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
24  * SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
25  * FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
26  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
27  * DEALINGS IN THE SOFTWARE.
28  **********************************************************************/
29 
30 #pragma once
31 
32 #include "utilconfig.h"
33 #include <QByteArray>
34 #include <QSet>
35 #include <QDataStream>
36 #include <QtDebug>
37 
38 namespace LeechCraft
39 {
40 namespace Util
41 {
48  template<typename T>
49  class IDPool
50  {
51  T CurrentID_;
52  public:
57  IDPool (const T& id = T ())
58  : CurrentID_ (id)
59  {
60  }
61 
64  virtual ~IDPool ()
65  {
66  }
67 
72  T GetID ()
73  {
74  return ++CurrentID_;
75  }
76 
81  void SetID (T id)
82  {
83  CurrentID_ = id;
84  }
85 
90  void FreeID (T)
91  {
92  }
93 
98  QByteArray SaveState () const
99  {
100  QByteArray result;
101  {
102  QDataStream ostr (&result, QIODevice::WriteOnly);
103  quint8 ver = 1;
104  ostr << ver;
105  ostr << CurrentID_;
106  }
107  return result;
108  }
109 
115  void LoadState (const QByteArray& state)
116  {
117  if (state.isEmpty ())
118  return;
119 
120  QDataStream istr (state);
121  quint8 ver;
122  istr >> ver;
123  if (ver == 1)
124  istr >> CurrentID_;
125  else
126  qWarning () << Q_FUNC_INFO
127  << "unknown version"
128  << ver
129  << ", not restoring state.";
130  }
131  };
132 }
133 }
A simple pool of identificators of the given type.
Definition: idpool.h:49
void FreeID(T)
Frees the id.
Definition: idpool.h:90
void SetID(T id)
Forcefully sets the current ID.
Definition: idpool.h:81
QByteArray SaveState() const
Saves the state of this pool.
Definition: idpool.h:98
void LoadState(const QByteArray &state)
Recovers the state of this pool.
Definition: idpool.h:115