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src/qt/src/kernel/qsharedmemory_p.h
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00001 /****************************************************************************
00002 ** $Id: qt/qsharedmemory_p.h   3.3.8   edited Jan 11 14:46 $
00003 **
00004 ** Includes system files for shared memory
00005 **
00006 ** Created : 020124
00007 **
00008 ** Copyright (C) 2005-2007 Trolltech ASA.  All rights reserved.
00009 **
00010 ** This file is part of the kernel module of the Qt GUI Toolkit.
00011 **
00012 ** This file may be distributed and/or modified under the terms of the
00013 ** GNU General Public License version 2 as published by the Free Software
00014 ** Foundation and appearing in the file LICENSE.GPL included in the
00015 ** packaging of this file.
00016 **
00017 ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
00018 ** licenses for Qt/Embedded may use this file in accordance with the
00019 ** Qt Embedded Commercial License Agreement provided with the Software.
00020 **
00021 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
00022 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
00023 **
00024 ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
00025 **   information about Qt Commercial License Agreements.
00026 ** See http://www.trolltech.com/gpl/ for GPL licensing information.
00027 **
00028 ** Contact info@trolltech.com if any conditions of this licensing are
00029 ** not clear to you.
00030 **
00031 **********************************************************************/
00032 
00033 #ifndef QSHAREDMEMORY_P_H
00034 #define QSHAREDMEMORY_P_H
00035 
00036 //
00037 //  W A R N I N G
00038 //  -------------
00039 //
00040 // This file is not part of the Qt API.  It exists for the convenience
00041 // of qapplication_qws.cpp and qgfxvnc_qws.cpp.  This header file may 
00042 // change from version to version without notice, or even be removed.
00043 //
00044 // We mean it.
00045 //
00046 //
00047 
00048 #ifndef QT_H
00049 #include "qstring.h"
00050 #endif // QT_H
00051 
00052 #if !defined (QT_QWS_NO_SHM)
00053 
00054 #include <sys/types.h>
00055 #include <sys/ipc.h>
00056 
00057 class QSharedMemory {
00058 public:
00059         QSharedMemory(){};
00060         QSharedMemory(int, QString, char c = 'Q');
00061         ~QSharedMemory(){};
00062 
00063         bool create();
00064         void destroy();
00065 
00066         bool attach();
00067         void detach();
00068 
00069         void setPermissions(mode_t mode);
00070         int size();
00071         void * base() { return shmBase; };
00072 
00073 private:
00074         void *shmBase;
00075         int shmSize;
00076         QString shmFile;
00077         char character;
00078 #if defined(QT_POSIX_QSHM)
00079         int shmFD;
00080 #else
00081         int shmId;
00082         key_t key;
00083         int idInitted;
00084 #endif
00085 };
00086 
00087 #endif
00088 
00089 #endif
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