author | Eckhart Koeppen <eckhart.koppen@nokia.com> |
Thu, 22 Apr 2010 16:15:11 +0300 | |
branch | RCL_3 |
changeset 14 | 8c4229025c0b |
parent 7 | 3f74d0d4af4c |
permissions | -rw-r--r-- |
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/**************************************************************************** |
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** |
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (qt-info@nokia.com) |
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** |
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** This file is part of the documentation of the Qt Toolkit. |
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** |
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** $QT_BEGIN_LICENSE:LGPL$ |
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** No Commercial Usage |
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** This file contains pre-release code and may not be distributed. |
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** You may use this file in accordance with the terms and conditions |
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** contained in the Technology Preview License Agreement accompanying |
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** this package. |
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** |
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** GNU Lesser General Public License Usage |
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** Alternatively, this file may be used under the terms of the GNU Lesser |
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** General Public License version 2.1 as published by the Free Software |
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** Foundation and appearing in the file LICENSE.LGPL included in the |
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** packaging of this file. Please review the following information to |
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** ensure the GNU Lesser General Public License version 2.1 requirements |
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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** |
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** In addition, as a special exception, Nokia gives you certain additional |
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** rights. These rights are described in the Nokia Qt LGPL Exception |
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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** |
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** If you have questions regarding the use of this file, please contact |
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** Nokia at qt-info@nokia.com. |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** |
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** $QT_END_LICENSE$ |
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** |
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****************************************************************************/ |
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|
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/*! |
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\page ipc.html |
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\title Inter-Process Communication in Qt |
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\brief Inter-Process communication in Qt applications. |
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|
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\ingroup frameworks-technologies |
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|
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Qt provides several ways to implement Inter-Process Communication |
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(IPC) in Qt applications. |
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|
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\section1 TCP/IP |
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|
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The cross-platform \l{QtNetwork} module provides classes that make |
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network programming portable and easy. It offers high-level |
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classes (e.g., QNetworkAccessManager, QFtp) that communicate using |
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specific application-level protocols, and lower-level classes |
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(e.g., QTcpSocket, QTcpServer, QSslSocket) for implementing |
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protocols. |
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|
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\section1 Shared Memory |
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|
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The cross-platform shared memory class, QSharedMemory, provides |
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access to the operating system's shared memory implementation. |
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It allows safe access to shared memory segments by multiple threads |
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and processes. Additionally, QSystemSemaphore can be used to control |
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access to resources shared by the system, as well as to communicate |
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between processes. |
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\section1 D-Bus |
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|
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The \l{QtDBus} module is a Unix-only library |
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you can use to implement IPC using the D-Bus protocol. It extends |
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Qt's \l{signalsandslots.html} {Signals and Slots} mechanism to the |
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IPC level, allowing a signal emitted by one process to be |
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connected to a slot in another process. This \l {Introduction to |
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D-Bus} page has detailed information on how to use the \l{QtDBus} |
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module. |
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\section1 Qt COmmunications Protocol (QCOP) |
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The QCopChannel class implements a protocol for transferring messages |
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between client processes across named channels. QCopChannel is |
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only available in \l{Qt for Embedded Linux}. Like the \l{QtDBus} |
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module, QCOP extends Qt's \l{Signals and Slots} mechanism to the |
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IPC level, allowing a signal emitted by one process to be |
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connected to a slot in another process, but unlike QtDBus, QCOP |
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does not depend on a third party library. |
3f74d0d4af4c
qt:70947f0f93d948bc89b3b43d00da758a51f1ef84
Eckhart Koeppen <eckhart.koppen@nokia.com>
parents:
diff
changeset
|
89 |
*/ |