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Diffstat (limited to 'src/corelib/kernel/qsharedmemory_win.cpp')
| -rw-r--r-- | src/corelib/kernel/qsharedmemory_win.cpp | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/src/corelib/kernel/qsharedmemory_win.cpp b/src/corelib/kernel/qsharedmemory_win.cpp deleted file mode 100644 index 30ae5fb275..0000000000 --- a/src/corelib/kernel/qsharedmemory_win.cpp +++ /dev/null @@ -1,191 +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 "qsharedmemory.h" -#include "qsharedmemory_p.h" -#include "qsystemsemaphore.h" -#include <qdebug.h> -#include <qt_windows.h> - -QT_BEGIN_NAMESPACE - -#ifndef QT_NO_SHAREDMEMORY - -QSharedMemoryPrivate::QSharedMemoryPrivate() : -#ifndef QT_NO_QOBJECT - QObjectPrivate(), -#endif - memory(0), size(0), error(QSharedMemory::NoError), - systemSemaphore(QString()), lockedByMe(false), hand(0) -{ -} - -void QSharedMemoryPrivate::setErrorString(QLatin1String function) -{ - DWORD windowsError = GetLastError(); - if (windowsError == 0) - return; - switch (windowsError) { - case ERROR_ALREADY_EXISTS: - error = QSharedMemory::AlreadyExists; - errorString = QSharedMemory::tr("%1: already exists").arg(function); - break; - case ERROR_FILE_NOT_FOUND: - error = QSharedMemory::NotFound; - errorString = QSharedMemory::tr("%1: doesn't exist").arg(function); - break; - case ERROR_COMMITMENT_LIMIT: - error = QSharedMemory::InvalidSize; - errorString = QSharedMemory::tr("%1: invalid size").arg(function); - break; - case ERROR_NO_SYSTEM_RESOURCES: - case ERROR_NOT_ENOUGH_MEMORY: - error = QSharedMemory::OutOfResources; - errorString = QSharedMemory::tr("%1: out of resources").arg(function); - break; - case ERROR_ACCESS_DENIED: - error = QSharedMemory::PermissionDenied; - errorString = QSharedMemory::tr("%1: permission denied").arg(function); - break; - default: - errorString = QSharedMemory::tr("%1: unknown error %2").arg(function).arg(windowsError); - error = QSharedMemory::UnknownError; -#if defined QSHAREDMEMORY_DEBUG - qDebug() << errorString << "key" << key; -#endif - } -} - -HANDLE QSharedMemoryPrivate::handle() -{ - if (!hand) { - const QLatin1String function("QSharedMemory::handle"); - if (nativeKey.isEmpty()) { - error = QSharedMemory::KeyError; - errorString = QSharedMemory::tr("%1: unable to make key").arg(function); - return 0; - } - hand = OpenFileMapping(FILE_MAP_ALL_ACCESS, false, - reinterpret_cast<const wchar_t *>(nativeKey.utf16())); - if (!hand) { - setErrorString(function); - return 0; - } - } - return hand; -} - -bool QSharedMemoryPrivate::cleanHandle() -{ - if (hand != 0 && !CloseHandle(hand)) { - hand = 0; - setErrorString(QLatin1String("QSharedMemory::cleanHandle")); - return false; - } - hand = 0; - return true; -} - -bool QSharedMemoryPrivate::create(qsizetype size) -{ - const QLatin1String function("QSharedMemory::create"); - if (nativeKey.isEmpty()) { - error = QSharedMemory::KeyError; - errorString = QSharedMemory::tr("%1: key error").arg(function); - return false; - } - - // Create the file mapping. - DWORD high, low; - if constexpr (sizeof(qsizetype) == 8) - high = DWORD(quint64(size) >> 32); - else - high = 0; - low = DWORD(size_t(size) & 0xffffffff); - hand = CreateFileMapping(INVALID_HANDLE_VALUE, 0, PAGE_READWRITE, high, low, - reinterpret_cast<const wchar_t *>(nativeKey.utf16())); - setErrorString(function); - - // hand is valid when it already exists unlike unix so explicitly check - return error != QSharedMemory::AlreadyExists && hand; -} - -bool QSharedMemoryPrivate::attach(QSharedMemory::AccessMode mode) -{ - // Grab a pointer to the memory block - int permissions = (mode == QSharedMemory::ReadOnly ? FILE_MAP_READ : FILE_MAP_ALL_ACCESS); - memory = (void *)MapViewOfFile(handle(), permissions, 0, 0, 0); - if (0 == memory) { - setErrorString(QLatin1String("QSharedMemory::attach")); - cleanHandle(); - return false; - } - - // Grab the size of the memory we have been given (a multiple of 4K on windows) - MEMORY_BASIC_INFORMATION info; - if (!VirtualQuery(memory, &info, sizeof(info))) { - // Windows doesn't set an error code on this one, - // it should only be a kernel memory error. - error = QSharedMemory::UnknownError; - errorString = QSharedMemory::tr("%1: size query failed").arg(QLatin1String("QSharedMemory::attach: ")); - return false; - } - size = qsizetype(info.RegionSize); - - return true; -} - -bool QSharedMemoryPrivate::detach() -{ - // umap memory - if (!UnmapViewOfFile(memory)) { - setErrorString(QLatin1String("QSharedMemory::detach")); - return false; - } - memory = 0; - size = 0; - - // close handle - return cleanHandle(); -} - -#endif //QT_NO_SHAREDMEMORY - - -QT_END_NAMESPACE |