LeechCraft  0.6.70-10870-g558588d6ec
Modular cross-platform feature rich live environment.
idpool.h
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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 id)
91  {
92  Q_UNUSED (id);
93  }
94 
99  QByteArray SaveState () const
100  {
101  QByteArray result;
102  {
103  QDataStream ostr (&result, QIODevice::WriteOnly);
104  quint8 ver = 1;
105  ostr << ver;
106  ostr << CurrentID_;
107  }
108  return result;
109  }
110 
116  void LoadState (const QByteArray& state)
117  {
118  if (state.isEmpty ())
119  return;
120 
121  QDataStream istr (state);
122  quint8 ver;
123  istr >> ver;
124  if (ver == 1)
125  istr >> CurrentID_;
126  else
127  qWarning () << Q_FUNC_INFO
128  << "unknown version"
129  << ver
130  << ", not restoring state.";
131  }
132  };
133 }
134 }
A simple pool of identificators of the given type.
Definition: idpool.h:49
virtual ~IDPool()
Destroys the pool.
Definition: idpool.h:64
IDPool(const T &id=T())
Creates a pool with the given initial value.
Definition: idpool.h:57
void SetID(T id)
Forcefully sets the current ID.
Definition: idpool.h:81
void FreeID(T id)
Frees the id.
Definition: idpool.h:90
void LoadState(const QByteArray &state)
Recovers the state of this pool.
Definition: idpool.h:116
T GetID()
Returns next ID.
Definition: idpool.h:72
QByteArray SaveState() const
Saves the state of this pool.
Definition: idpool.h:99