File indexing completed on 2024-04-28 05:41:06
0001 /* 0002 Copyright (C) 2015 Volker Krause <vkrause@kde.org> 0003 0004 This program is free software; you can redistribute it and/or modify it 0005 under the terms of the GNU Library General Public License as published by 0006 the Free Software Foundation; either version 2 of the License, or (at your 0007 option) any later version. 0008 0009 This program is distributed in the hope that it will be useful, but WITHOUT 0010 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 0011 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public 0012 License for more details. 0013 0014 You should have received a copy of the GNU General Public License 0015 along with this program. If not, see <https://www.gnu.org/licenses/>. 0016 */ 0017 0018 #include <QSharedData> 0019 0020 class QValueTypePrivateUnpacked : public QSharedData 0021 { 0022 // 4 byte padding 0023 void *m1; 0024 int m2; 0025 }; 0026 0027 class QValueTypePrivatePacked : public QSharedData 0028 { 0029 int m1; 0030 void *m2; 0031 }; 0032 0033 0034 int main (int, char**) 0035 { 0036 // make sure the structures aren't optimized away by the compiler 0037 unsigned long long dummy = 0; 0038 #define USED(StructType) { StructType s; dummy += (unsigned long long)&s; } 0039 0040 USED(QValueTypePrivateUnpacked) 0041 USED(QValueTypePrivatePacked) 0042 0043 return dummy; 0044 }