diff options
Diffstat (limited to 'src/corelib/kernel/qsystemsemaphore_systemv.cpp')
| -rw-r--r-- | src/corelib/kernel/qsystemsemaphore_systemv.cpp | 224 |
1 files changed, 0 insertions, 224 deletions
diff --git a/src/corelib/kernel/qsystemsemaphore_systemv.cpp b/src/corelib/kernel/qsystemsemaphore_systemv.cpp deleted file mode 100644 index 1c9fc1f2f7..0000000000 --- a/src/corelib/kernel/qsystemsemaphore_systemv.cpp +++ /dev/null @@ -1,224 +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 "qsystemsemaphore.h" -#include "qsystemsemaphore_p.h" - -#include <qdebug.h> -#include <qfile.h> -#include <qcoreapplication.h> - -#ifndef QT_POSIX_IPC - -#ifndef QT_NO_SYSTEMSEMAPHORE - -#include <sys/types.h> -#include <sys/ipc.h> -#include <sys/sem.h> -#include <fcntl.h> -#include <errno.h> - -#if defined(Q_OS_DARWIN) -#include "qcore_mac_p.h" -#endif - -#include "private/qcore_unix_p.h" - -// OpenBSD 4.2 doesn't define EIDRM, see BUGS section: -// http://www.openbsd.org/cgi-bin/man.cgi?query=semop&manpath=OpenBSD+4.2 -#if defined(Q_OS_OPENBSD) && !defined(EIDRM) -#define EIDRM EINVAL -#endif - -QT_BEGIN_NAMESPACE - -/*! - \internal - - Setup unix_key - */ -key_t QSystemSemaphorePrivate::handle(QSystemSemaphore::AccessMode mode) -{ -#if defined(Q_OS_DARWIN) - if (qt_apple_isSandboxed()) { - errorString = QSystemSemaphore::tr("%1: System V semaphores are not available " \ - "for sandboxed applications. Please build Qt with -feature-ipc_posix") - .arg(QLatin1String("QSystemSemaphore::handle:")); - error = QSystemSemaphore::PermissionDenied; - return -1; - } -#endif - - if (key.isEmpty()){ - errorString = QSystemSemaphore::tr("%1: key is empty") - .arg(QLatin1String("QSystemSemaphore::handle:")); - error = QSystemSemaphore::KeyError; - return -1; - } - - // ftok requires that an actual file exists somewhere - if (-1 != unix_key) - return unix_key; - - // Create the file needed for ftok - int built = QSharedMemoryPrivate::createUnixKeyFile(fileName); - if (-1 == built) { - errorString = QSystemSemaphore::tr("%1: unable to make key") - .arg(QLatin1String("QSystemSemaphore::handle:")); - error = QSystemSemaphore::KeyError; - return -1; - } - createdFile = (1 == built); - -#if !defined(QT_NO_SHAREDMEMORY) && !defined(QT_POSIX_IPC) && !defined(Q_OS_ANDROID) - // Get the unix key for the created file - unix_key = ftok(QFile::encodeName(fileName).constData(), 'Q'); -#endif - if (-1 == unix_key) { - errorString = QSystemSemaphore::tr("%1: ftok failed") - .arg(QLatin1String("QSystemSemaphore::handle:")); - error = QSystemSemaphore::KeyError; - return -1; - } - - // Get semaphore - semaphore = semget(unix_key, 1, 0600 | IPC_CREAT | IPC_EXCL); - if (-1 == semaphore) { - if (errno == EEXIST) - semaphore = semget(unix_key, 1, 0600 | IPC_CREAT); - if (-1 == semaphore) { - setErrorString(QLatin1String("QSystemSemaphore::handle")); - cleanHandle(); - return -1; - } - } else { - createdSemaphore = true; - // Force cleanup of file, it is possible that it can be left over from a crash - createdFile = true; - } - - if (mode == QSystemSemaphore::Create) { - createdSemaphore = true; - createdFile = true; - } - - // Created semaphore so initialize its value. - if (createdSemaphore && initialValue >= 0) { - qt_semun init_op; - init_op.val = initialValue; - if (-1 == semctl(semaphore, 0, SETVAL, init_op)) { - setErrorString(QLatin1String("QSystemSemaphore::handle")); - cleanHandle(); - return -1; - } - } - - return unix_key; -} - -/*! - \internal - - Cleanup the unix_key - */ -void QSystemSemaphorePrivate::cleanHandle() -{ - unix_key = -1; - - // remove the file if we made it - if (createdFile) { - QFile::remove(fileName); - createdFile = false; - } - - if (createdSemaphore) { - if (-1 != semaphore) { - if (-1 == semctl(semaphore, 0, IPC_RMID, 0)) { - setErrorString(QLatin1String("QSystemSemaphore::cleanHandle")); -#if defined QSYSTEMSEMAPHORE_DEBUG - qDebug("QSystemSemaphore::cleanHandle semctl failed."); -#endif - } - semaphore = -1; - } - createdSemaphore = false; - } -} - -/*! - \internal - */ -bool QSystemSemaphorePrivate::modifySemaphore(int count) -{ - if (-1 == handle()) - return false; - - struct sembuf operation; - operation.sem_num = 0; - operation.sem_op = count; - operation.sem_flg = SEM_UNDO; - - int res; - EINTR_LOOP(res, semop(semaphore, &operation, 1)); - if (-1 == res) { - // If the semaphore was removed be nice and create it and then modifySemaphore again - if (errno == EINVAL || errno == EIDRM) { - semaphore = -1; - cleanHandle(); - handle(); - return modifySemaphore(count); - } - setErrorString(QLatin1String("QSystemSemaphore::modifySemaphore")); -#if defined QSYSTEMSEMAPHORE_DEBUG - qDebug("QSystemSemaphore::modify failed %d %d %d %d %d", - count, int(semctl(semaphore, 0, GETVAL)), int(errno), int(EIDRM), int(EINVAL); -#endif - return false; - } - - clearError(); - return true; -} - - -QT_END_NAMESPACE - -#endif // QT_NO_SYSTEMSEMAPHORE - -#endif // QT_POSIX_IPC |