diff options
Diffstat (limited to 'examples/corelib/ipc/sharedmemory/dialog.cpp')
| -rw-r--r-- | examples/corelib/ipc/sharedmemory/dialog.cpp | 69 |
1 files changed, 16 insertions, 53 deletions
diff --git a/examples/corelib/ipc/sharedmemory/dialog.cpp b/examples/corelib/ipc/sharedmemory/dialog.cpp index 4e999d1bcf..4e8f93a77b 100644 --- a/examples/corelib/ipc/sharedmemory/dialog.cpp +++ b/examples/corelib/ipc/sharedmemory/dialog.cpp @@ -1,56 +1,13 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the examples of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:BSD$ -** 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. -** -** BSD License Usage -** Alternatively, you may use this file under the terms of the BSD license -** as follows: -** -** "Redistribution and use in source and binary forms, with or without -** modification, are permitted provided that the following conditions are -** met: -** * Redistributions of source code must retain the above copyright -** notice, this list of conditions and the following disclaimer. -** * Redistributions in binary form must reproduce the above copyright -** notice, this list of conditions and the following disclaimer in -** the documentation and/or other materials provided with the -** distribution. -** * Neither the name of The Qt Company Ltd nor the names of its -** contributors may be used to endorse or promote products derived -** from this software without specific prior written permission. -** -** -** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." -** -** $QT_END_LICENSE$ -** -****************************************************************************/ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause #include "dialog.h" -#include <QFileDialog> + #include <QBuffer> +#include <QFileDialog> +#include <QNativeIpcKey> + +using namespace Qt::StringLiterals; /*! \class Dialog @@ -76,8 +33,9 @@ each button. */ //! [0] + Dialog::Dialog(QWidget *parent) - : QDialog(parent), sharedMemory("QSharedMemoryExample") + : QDialog(parent), sharedMemory(QNativeIpcKey(u"QSharedMemoryExample"_s)) { ui.setupUi(this); connect(ui.loadFromFileButton, &QPushButton::clicked, @@ -136,8 +94,13 @@ void Dialog::loadFromFile() int size = buffer.size(); if (!sharedMemory.create(size)) { - ui.label->setText(tr("Unable to create shared memory segment.")); - return; + if (sharedMemory.error() == QSharedMemory::AlreadyExists) { + sharedMemory.attach(); + } else { + ui.label->setText(tr("Unable to create or attach to shared memory segment: %1") + .arg(sharedMemory.errorString())); + return; + } } sharedMemory.lock(); char *to = (char*)sharedMemory.data(); |