155 lines
4.1 KiB
C++
155 lines
4.1 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/
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**
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** This file is part of the QtDBus module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this
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** file. Please review the following information to ensure the GNU Lesser
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** General Public License version 2.1 requirements will be met:
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** 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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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License version 3.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of this
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** file. Please review the following information to ensure the GNU General
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** Public License version 3.0 requirements will be met:
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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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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#include <QtCore/qglobal.h>
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#ifndef QT_BOOTSTRAPPED
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#include <QtCore/qlibrary.h>
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#endif
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#include <QtCore/qmutex.h>
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#include <private/qmutexpool_p.h>
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#ifndef QT_NO_DBUS
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extern "C" void dbus_shutdown();
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QT_BEGIN_NAMESPACE
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void (*qdbus_resolve_me(const char *name))();
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#if !defined QT_LINKED_LIBDBUS
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#ifndef QT_BOOTSTRAPPED
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static QLibrary *qdbus_libdbus = 0;
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void qdbus_unloadLibDBus()
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{
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if (qdbus_libdbus) {
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if (qEnvironmentVariableIsSet("QDBUS_FORCE_SHUTDOWN"))
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qdbus_libdbus->resolve("dbus_shutdown")();
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qdbus_libdbus->unload();
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}
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delete qdbus_libdbus;
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qdbus_libdbus = 0;
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}
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#endif
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bool qdbus_loadLibDBus()
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{
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#ifndef QT_BOOTSTRAPPED
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#ifdef QT_BUILD_INTERNAL
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// this is to simulate a library load failure for our autotest suite.
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if (!qEnvironmentVariableIsEmpty("QT_SIMULATE_DBUS_LIBFAIL"))
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return false;
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#endif
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static bool triedToLoadLibrary = false;
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#ifndef QT_NO_THREAD
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QMutexLocker locker(QMutexPool::globalInstanceGet((void *)&qdbus_resolve_me));
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#endif
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QLibrary *&lib = qdbus_libdbus;
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if (triedToLoadLibrary)
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return lib && lib->isLoaded();
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lib = new QLibrary;
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triedToLoadLibrary = true;
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static int majorversions[] = { 3, 2, -1 };
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lib->unload();
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lib->setFileName(QLatin1String("dbus-1"));
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for (uint i = 0; i < sizeof(majorversions) / sizeof(majorversions[0]); ++i) {
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lib->setFileNameAndVersion(lib->fileName(), majorversions[i]);
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if (lib->load() && lib->resolve("dbus_connection_open_private"))
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return true;
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lib->unload();
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}
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delete lib;
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lib = 0;
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return false;
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#else
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return true;
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#endif
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}
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#ifndef QT_BOOTSTRAPPED
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void (*qdbus_resolve_conditionally(const char *name))()
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{
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if (qdbus_loadLibDBus())
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return qdbus_libdbus->resolve(name);
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return 0;
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}
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#endif
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void (*qdbus_resolve_me(const char *name))()
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{
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#ifndef QT_BOOTSTRAPPED
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if (!qdbus_loadLibDBus())
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qFatal("Cannot find libdbus-1 in your system to resolve symbol '%s'.", name);
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QFunctionPointer ptr = qdbus_libdbus->resolve(name);
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if (!ptr)
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qFatal("Cannot resolve '%s' in your libdbus-1.", name);
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return ptr;
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#else
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Q_UNUSED(name);
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return 0;
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#endif
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}
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#else // QT_LINKED_LIBDBUS
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static void qdbus_unloadLibDBus()
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{
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if (qEnvironmentVariableIsSet("QDBUS_FORCE_SHUTDOWN"))
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dbus_shutdown();
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}
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#endif // !QT_LINKED_LIBDBUS
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#ifndef QT_BOOTSTRAPPED
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Q_DESTRUCTOR_FUNCTION(qdbus_unloadLibDBus)
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#endif
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QT_END_NAMESPACE
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#endif // QT_NO_DBUS
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