File indexing completed on 2024-04-28 04:50:50
0001 /* 0002 * shareddata.h 0003 * 0004 * Copyright (C) 2011 Christoph Pfister <christophpfister@gmail.com> 0005 * 0006 * This program is free software; you can redistribute it and/or modify 0007 * it under the terms of the GNU General Public License as published by 0008 * the Free Software Foundation; either version 2 of the License, or 0009 * (at your option) any later version. 0010 * 0011 * This program is distributed in the hope that it will be useful, 0012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 0013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 0014 * GNU General Public License for more details. 0015 * 0016 * You should have received a copy of the GNU General Public License along 0017 * with this program; if not, write to the Free Software Foundation, Inc., 0018 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 0019 */ 0020 0021 #ifndef SHAREDDATA_H 0022 #define SHAREDDATA_H 0023 0024 #include <QSharedData> 0025 0026 class SharedData : public QSharedData 0027 { 0028 public: 0029 SharedData() { } 0030 SharedData(const SharedData &sh) : QSharedData(sh) { } 0031 ~SharedData() { } 0032 0033 SharedData &operator=(const SharedData &) 0034 { 0035 return *this; 0036 } 0037 }; 0038 0039 template<class T> class ExplicitlySharedDataPointer 0040 { 0041 public: 0042 explicit ExplicitlySharedDataPointer(T *data_ = NULL) : data(data_) { } 0043 ~ExplicitlySharedDataPointer() { } 0044 0045 bool isValid() const 0046 { 0047 return (data.constData() != NULL); 0048 } 0049 0050 const T *constData() const 0051 { 0052 return data.constData(); 0053 } 0054 0055 const T &operator*() const 0056 { 0057 return *data; 0058 } 0059 0060 const T *operator->() const 0061 { 0062 return data.constData(); 0063 } 0064 0065 bool operator==(const ExplicitlySharedDataPointer<T> &other) const 0066 { 0067 return (data.constData() == other.data.constData()); 0068 } 0069 0070 bool operator!=(const ExplicitlySharedDataPointer<T> &other) const 0071 { 0072 return (data.constData() != other.data.constData()); 0073 } 0074 0075 bool operator<(const ExplicitlySharedDataPointer<T> &other) const 0076 { 0077 return (data.constData() < other.data.constData()); 0078 } 0079 0080 friend uint qHash(const ExplicitlySharedDataPointer<T> &pointer) 0081 { 0082 return qHash(pointer.data.constData()); 0083 } 0084 0085 private: 0086 QExplicitlySharedDataPointer<T> data; 0087 }; 0088 0089 #endif /* SHAREDDATA_H */