diff options
Diffstat (limited to 'src/corelib/kernel/qsharedmemory_systemv.cpp')
-rw-r--r-- | src/corelib/kernel/qsharedmemory_systemv.cpp | 260 |
1 files changed, 0 insertions, 260 deletions
diff --git a/src/corelib/kernel/qsharedmemory_systemv.cpp b/src/corelib/kernel/qsharedmemory_systemv.cpp deleted file mode 100644 index 0ba5f65641..0000000000 --- a/src/corelib/kernel/qsharedmemory_systemv.cpp +++ /dev/null @@ -1,260 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the QtCore module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qplatformdefs.h" - -#include "qsharedmemory.h" -#include "qsharedmemory_p.h" -#include "qsystemsemaphore.h" -#include <qdir.h> -#include <qdebug.h> - -#include <errno.h> - -#ifndef QT_POSIX_IPC - -#ifndef QT_NO_SHAREDMEMORY -#include <sys/types.h> -#include <sys/ipc.h> -#include <sys/shm.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <unistd.h> -#endif //QT_NO_SHAREDMEMORY - -#include "private/qcore_unix_p.h" - -#ifndef QT_NO_SHAREDMEMORY -QT_BEGIN_NAMESPACE - -/*! - \internal - - If not already made create the handle used for accessing the shared memory. -*/ -key_t QSharedMemoryPrivate::handle() -{ - // already made - if (unix_key) - return unix_key; - - // don't allow making handles on empty keys - if (nativeKey.isEmpty()) { - errorString = QSharedMemory::tr("%1: key is empty").arg(QLatin1String("QSharedMemory::handle:")); - error = QSharedMemory::KeyError; - return 0; - } - - // ftok requires that an actual file exists somewhere - if (!QFile::exists(nativeKey)) { - errorString = QSharedMemory::tr("%1: UNIX key file doesn't exist").arg(QLatin1String("QSharedMemory::handle:")); - error = QSharedMemory::NotFound; - return 0; - } - - unix_key = ftok(QFile::encodeName(nativeKey).constData(), 'Q'); - if (-1 == unix_key) { - errorString = QSharedMemory::tr("%1: ftok failed").arg(QLatin1String("QSharedMemory::handle:")); - error = QSharedMemory::KeyError; - unix_key = 0; - } - return unix_key; -} - -#endif // QT_NO_SHAREDMEMORY - -#if !(defined(QT_NO_SHAREDMEMORY) && defined(QT_NO_SYSTEMSEMAPHORE)) -/*! - \internal - Creates the unix file if needed. - returns \c true if the unix file was created. - - -1 error - 0 already existed - 1 created - */ -int QSharedMemoryPrivate::createUnixKeyFile(const QString &fileName) -{ - int fd = qt_safe_open(QFile::encodeName(fileName).constData(), - O_EXCL | O_CREAT | O_RDWR, 0640); - if (-1 == fd) { - if (errno == EEXIST) - return 0; - return -1; - } else { - close(fd); - } - return 1; -} -#endif // QT_NO_SHAREDMEMORY && QT_NO_SYSTEMSEMAPHORE - -#ifndef QT_NO_SHAREDMEMORY - -bool QSharedMemoryPrivate::cleanHandle() -{ - unix_key = 0; - return true; -} - -bool QSharedMemoryPrivate::create(int size) -{ - // build file if needed - bool createdFile = false; - int built = createUnixKeyFile(nativeKey); - if (built == -1) { - errorString = QSharedMemory::tr("%1: unable to make key").arg(QLatin1String("QSharedMemory::handle:")); - error = QSharedMemory::KeyError; - return false; - } - if (built == 1) { - createdFile = true; - } - - // get handle - if (!handle()) { - if (createdFile) - QFile::remove(nativeKey); - return false; - } - - // create - if (-1 == shmget(unix_key, size, 0600 | IPC_CREAT | IPC_EXCL)) { - const QLatin1String function("QSharedMemory::create"); - switch (errno) { - case EINVAL: - errorString = QSharedMemory::tr("%1: system-imposed size restrictions").arg(QLatin1String("QSharedMemory::handle")); - error = QSharedMemory::InvalidSize; - break; - default: - setErrorString(function); - } - if (createdFile && error != QSharedMemory::AlreadyExists) - QFile::remove(nativeKey); - return false; - } - - return true; -} - -bool QSharedMemoryPrivate::attach(QSharedMemory::AccessMode mode) -{ - // grab the shared memory segment id - int id = shmget(unix_key, 0, (mode == QSharedMemory::ReadOnly ? 0400 : 0600)); - if (-1 == id) { - setErrorString(QLatin1String("QSharedMemory::attach (shmget)")); - return false; - } - - // grab the memory - memory = shmat(id, nullptr, (mode == QSharedMemory::ReadOnly ? SHM_RDONLY : 0)); - if ((void*) - 1 == memory) { - memory = nullptr; - setErrorString(QLatin1String("QSharedMemory::attach (shmat)")); - return false; - } - - // grab the size - shmid_ds shmid_ds; - if (!shmctl(id, IPC_STAT, &shmid_ds)) { - size = (int)shmid_ds.shm_segsz; - } else { - setErrorString(QLatin1String("QSharedMemory::attach (shmctl)")); - return false; - } - - return true; -} - -bool QSharedMemoryPrivate::detach() -{ - // detach from the memory segment - if (-1 == shmdt(memory)) { - const QLatin1String function("QSharedMemory::detach"); - switch (errno) { - case EINVAL: - errorString = QSharedMemory::tr("%1: not attached").arg(function); - error = QSharedMemory::NotFound; - break; - default: - setErrorString(function); - } - return false; - } - memory = nullptr; - size = 0; - - // Get the number of current attachments - int id = shmget(unix_key, 0, 0400); - cleanHandle(); - - struct shmid_ds shmid_ds; - if (0 != shmctl(id, IPC_STAT, &shmid_ds)) { - switch (errno) { - case EINVAL: - return true; - default: - return false; - } - } - // If there are no attachments then remove it. - if (shmid_ds.shm_nattch == 0) { - // mark for removal - if (-1 == shmctl(id, IPC_RMID, &shmid_ds)) { - setErrorString(QLatin1String("QSharedMemory::remove")); - switch (errno) { - case EINVAL: - return true; - default: - return false; - } - } - - // remove file - if (!QFile::remove(nativeKey)) - return false; - } - return true; -} - - -QT_END_NAMESPACE - -#endif // QT_NO_SHAREDMEMORY - -#endif // QT_POSIX_IPC |