diff options
Diffstat (limited to 'src/gui/embedded/qwssharedmemory.cpp')
-rw-r--r-- | src/gui/embedded/qwssharedmemory.cpp | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/src/gui/embedded/qwssharedmemory.cpp b/src/gui/embedded/qwssharedmemory.cpp deleted file mode 100644 index 07c46254bd..0000000000 --- a/src/gui/embedded/qwssharedmemory.cpp +++ /dev/null @@ -1,185 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the QtGui module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** No Commercial Usage -** This file contains pre-release code and may not be distributed. -** You may use this file in accordance with the terms and conditions -** contained in the Technology Preview License Agreement accompanying -** this package. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 2.1 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 2.1 requirements -** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** If you have questions regarding the use of this file, please contact -** Nokia at qt-info@nokia.com. -** -** -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qwssharedmemory_p.h" - -#if !defined(QT_NO_QWS_MULTIPROCESS) - -#include <sys/shm.h> - -QT_BEGIN_NAMESPACE - -QWSSharedMemory::QWSSharedMemory() - : shmBase(0), shmSize(0), character(0), shmId(-1), key(-1) -{ -} - - -QWSSharedMemory::~QWSSharedMemory() -{ - detach(); -} - -/* - man page says: - On Linux, it is possible to attach a shared memory segment even if it - is already marked to be deleted. However, POSIX.1-2001 does not spec- - ify this behaviour and many other implementations do not support it. -*/ - -bool QWSSharedMemory::create(int size) -{ - if (shmId != -1) - detach(); - shmId = shmget(IPC_PRIVATE, size, IPC_CREAT|0600); - - if (shmId == -1) { -#ifdef QT_SHM_DEBUG - perror("QWSSharedMemory::create allocating shared memory"); - qWarning("Error allocating shared memory of size %d", size); -#endif - return false; - } - shmBase = shmat(shmId,0,0); - shmctl(shmId, IPC_RMID, 0); - if (shmBase == (void*)-1) { -#ifdef QT_SHM_DEBUG - perror("QWSSharedMemory::create attaching to shared memory"); - qWarning("Error attaching to shared memory id %d", shmId); -#endif - shmBase = 0; - return false; - } - return true; -} - -bool QWSSharedMemory::attach(int id) -{ - if (shmId == id) - return id != -1; - if (shmId != -1) - detach(); - - shmBase = shmat(id,0,0); - if (shmBase == (void*)-1) { -#ifdef QT_SHM_DEBUG - perror("QWSSharedMemory::attach attaching to shared memory"); - qWarning("Error attaching to shared memory 0x%x of size %d", - id, size()); -#endif - shmBase = 0; - return false; - } - shmId = id; - return true; -} - - -void QWSSharedMemory::detach () -{ - if (!shmBase) - return; - shmdt (shmBase); - shmBase = 0; - shmSize = 0; - shmId = -1; -} - -void QWSSharedMemory::setPermissions (mode_t mode) -{ - struct shmid_ds shm; - shmctl (shmId, IPC_STAT, &shm); - shm.shm_perm.mode = mode; - shmctl (shmId, IPC_SET, &shm); -} - -int QWSSharedMemory::size () const -{ - struct shmid_ds shm; - shmctl (shmId, IPC_STAT, &shm); - return shm.shm_segsz; -} - - -// old API - - - -QWSSharedMemory::QWSSharedMemory (int size, const QString &filename, char c) -{ - shmSize = size; - shmFile = filename; - shmBase = 0; - shmId = -1; - character = c; - key = ftok (shmFile.toLatin1().constData(), c); -} - - - -bool QWSSharedMemory::create () -{ - shmId = shmget (key, shmSize, IPC_CREAT | 0666); - return (shmId != -1); -} - -void QWSSharedMemory::destroy () -{ - if (shmId != -1) - shmctl(shmId, IPC_RMID, 0); -} - -bool QWSSharedMemory::attach () -{ - if (shmId == -1) - shmId = shmget (key, shmSize, 0); - - shmBase = shmat (shmId, 0, 0); - if ((long)shmBase == -1) - shmBase = 0; - - return (long)shmBase != 0; -} - - -QT_END_NAMESPACE - -#endif // QT_NO_QWS_MULTIPROCESS |