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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtDBus module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtCore/qglobal.h>
#ifndef QT_BOOTSTRAPPED
#include <QtCore/qlibrary.h>
#endif
#include <QtCore/qmutex.h>
#include <private/qmutexpool_p.h>
#ifndef QT_NO_DBUS
extern "C" void dbus_shutdown();
QT_BEGIN_NAMESPACE
void (*qdbus_resolve_me(const char *name))();
#if !defined QT_LINKED_LIBDBUS
#ifndef QT_BOOTSTRAPPED
static QLibrary *qdbus_libdbus = 0;
void qdbus_unloadLibDBus()
{
if (qdbus_libdbus) {
if (qEnvironmentVariableIsSet("QDBUS_FORCE_SHUTDOWN"))
qdbus_libdbus->resolve("dbus_shutdown")();
qdbus_libdbus->unload();
}
delete qdbus_libdbus;
qdbus_libdbus = 0;
}
#endif
bool qdbus_loadLibDBus()
{
#ifndef QT_BOOTSTRAPPED
#ifdef QT_BUILD_INTERNAL
// this is to simulate a library load failure for our autotest suite.
if (!qEnvironmentVariableIsEmpty("QT_SIMULATE_DBUS_LIBFAIL"))
return false;
#endif
static bool triedToLoadLibrary = false;
#ifndef QT_NO_THREAD
QMutexLocker locker(QMutexPool::globalInstanceGet((void *)&qdbus_resolve_me));
#endif
QLibrary *&lib = qdbus_libdbus;
if (triedToLoadLibrary)
return lib && lib->isLoaded();
lib = new QLibrary;
triedToLoadLibrary = true;
static int majorversions[] = { 3, 2, -1 };
const QString baseNames[] = {
#ifdef Q_OS_WIN
QStringLiteral("dbus-1"),
#endif
QStringLiteral("libdbus-1")
};
lib->unload();
for (uint i = 0; i < sizeof(majorversions) / sizeof(majorversions[0]); ++i) {
for (uint j = 0; j < sizeof(baseNames) / sizeof(baseNames[0]); ++j) {
#ifdef Q_OS_WIN
QString suffix;
if (majorversions[i] != -1)
suffix = QString::number(- majorversions[i]); // negative so it prepends the dash
lib->setFileName(baseNames[j] + suffix);
#else
lib->setFileNameAndVersion(baseNames[j], majorversions[i]);
#endif
if (lib->load() && lib->resolve("dbus_connection_open_private"))
return true;
lib->unload();
}
}
delete lib;
lib = 0;
return false;
#else
return true;
#endif
}
#ifndef QT_BOOTSTRAPPED
void (*qdbus_resolve_conditionally(const char *name))()
{
if (qdbus_loadLibDBus())
return qdbus_libdbus->resolve(name);
return 0;
}
#endif
void (*qdbus_resolve_me(const char *name))()
{
#ifndef QT_BOOTSTRAPPED
if (!qdbus_loadLibDBus())
qFatal("Cannot find libdbus-1 in your system to resolve symbol '%s'.", name);
QFunctionPointer ptr = qdbus_libdbus->resolve(name);
if (!ptr)
qFatal("Cannot resolve '%s' in your libdbus-1.", name);
return ptr;
#else
Q_UNUSED(name);
return 0;
#endif
}
#else // QT_LINKED_LIBDBUS
static void qdbus_unloadLibDBus()
{
if (qEnvironmentVariableIsSet("QDBUS_FORCE_SHUTDOWN"))
dbus_shutdown();
}
#endif // !QT_LINKED_LIBDBUS
#ifndef QT_BOOTSTRAPPED
Q_DESTRUCTOR_FUNCTION(qdbus_unloadLibDBus)
#endif
QT_END_NAMESPACE
#endif // QT_NO_DBUS
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