| /**************************************************************************** |
| ** |
| ** 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 QtCore module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** GNU Lesser General Public License Usage |
| ** 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. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU General |
| ** Public License version 3.0 as published by the Free Software Foundation |
| ** and appearing in the file LICENSE.GPL included in the packaging of this |
| ** file. Please review the following information to ensure the GNU General |
| ** Public License version 3.0 requirements will be met: |
| ** http://www.gnu.org/copyleft/gpl.html. |
| ** |
| ** Other Usage |
| ** Alternatively, this file may be used in accordance with the terms and |
| ** conditions contained in a signed written agreement between you and Nokia. |
| ** |
| ** |
| ** |
| ** |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include "qsharedmemory.h" |
| #include "qsharedmemory_p.h" |
| #include "qsystemsemaphore.h" |
| #include "qcore_symbian_p.h" |
| #include <qdebug.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| #ifndef QT_NO_SHAREDMEMORY |
| |
| #define QSHAREDMEMORY_DEBUG |
| |
| QSharedMemoryPrivate::QSharedMemoryPrivate() : QObjectPrivate(), |
| memory(0), size(0), error(QSharedMemory::NoError), |
| systemSemaphore(QString()), lockedByMe(false) |
| { |
| } |
| |
| void QSharedMemoryPrivate::setErrorString(const QString &function, TInt errorCode) |
| { |
| if (errorCode == KErrNone) |
| return; |
| switch (errorCode) { |
| case KErrAlreadyExists: |
| error = QSharedMemory::AlreadyExists; |
| errorString = QSharedMemory::tr("%1: already exists").arg(function); |
| break; |
| case KErrNotFound: |
| error = QSharedMemory::NotFound; |
| errorString = QSharedMemory::tr("%1: doesn't exists").arg(function); |
| break; |
| case KErrArgument: |
| error = QSharedMemory::InvalidSize; |
| errorString = QSharedMemory::tr("%1: invalid size").arg(function); |
| break; |
| case KErrNoMemory: |
| error = QSharedMemory::OutOfResources; |
| errorString = QSharedMemory::tr("%1: out of resources").arg(function); |
| break; |
| case KErrPermissionDenied: |
| error = QSharedMemory::PermissionDenied; |
| errorString = QSharedMemory::tr("%1: permission denied").arg(function); |
| break; |
| default: |
| errorString = QSharedMemory::tr("%1: unknown error %2").arg(function).arg(errorCode); |
| error = QSharedMemory::UnknownError; |
| #if defined QSHAREDMEMORY_DEBUG |
| qDebug() << errorString << "key" << key; |
| #endif |
| } |
| } |
| |
| key_t QSharedMemoryPrivate::handle() |
| { |
| // Not really cost effective to check here if shared memory is attachable, as it requires |
| // exactly the same call as attaching, so always assume handle is valid and return failure |
| // from attach. |
| return 1; |
| } |
| |
| bool QSharedMemoryPrivate::cleanHandle() |
| { |
| chunk.Close(); |
| return true; |
| } |
| |
| bool QSharedMemoryPrivate::create(int size) |
| { |
| // Get a windows acceptable key |
| QString safeKey = makePlatformSafeKey(key); |
| QString function = QLatin1String("QSharedMemory::create"); |
| if (safeKey.isEmpty()) { |
| error = QSharedMemory::KeyError; |
| errorString = QSharedMemory::tr("%1: key error").arg(function); |
| return false; |
| } |
| |
| TPtrC ptr(qt_QString2TPtrC(safeKey)); |
| |
| TInt err = chunk.CreateGlobal(ptr, size, size); |
| |
| setErrorString(function, err); |
| |
| if (err != KErrNone) |
| return false; |
| |
| // Zero out the created chunk |
| Mem::FillZ(chunk.Base(), chunk.Size()); |
| |
| return true; |
| } |
| |
| bool QSharedMemoryPrivate::attach(QSharedMemory::AccessMode /* mode */) |
| { |
| // Grab a pointer to the memory block |
| if (!chunk.Handle()) { |
| QString function = QLatin1String("QSharedMemory::handle"); |
| QString safeKey = makePlatformSafeKey(key); |
| if (safeKey.isEmpty()) { |
| error = QSharedMemory::KeyError; |
| errorString = QSharedMemory::tr("%1: unable to make key").arg(function); |
| return false; |
| } |
| |
| TPtrC ptr(qt_QString2TPtrC(safeKey)); |
| |
| TInt err = KErrNoMemory; |
| |
| err = chunk.OpenGlobal(ptr, false); |
| |
| if (err != KErrNone) { |
| setErrorString(function, err); |
| return false; |
| } |
| } |
| |
| size = chunk.Size(); |
| memory = chunk.Base(); |
| |
| return true; |
| } |
| |
| bool QSharedMemoryPrivate::detach() |
| { |
| chunk.Close(); |
| |
| memory = 0; |
| size = 0; |
| |
| return true; |
| } |
| |
| #endif //QT_NO_SHAREDMEMORY |
| |
| QT_END_NAMESPACE |