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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Copyright (C) 2016 Intel Corporation.
** 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QLIBRARY_P_H
#define QLIBRARY_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of the QLibrary class. This header file may change from
// version to version without notice, or even be removed.
//
// We mean it.
//
#include "QtCore/qlibrary.h"
#include "QtCore/qpointer.h"
#include "QtCore/qstringlist.h"
#include "QtCore/qplugin.h"
#include "QtCore/qsharedpointer.h"
#include "QtCore/qjsonobject.h"
#include "QtCore/qjsondocument.h"
#include "QtCore/qendian.h"
#ifdef Q_OS_WIN
# include "QtCore/qt_windows.h"
#endif
QT_BEGIN_NAMESPACE
// Needed also in case of QT_NO_LIBRARY, for static plugin loading.
inline QJsonDocument qJsonFromRawLibraryMetaData(const char *raw)
{
raw += strlen("QTMETADATA ");
// the size of the embedded JSON object can be found 8 bytes into the data (see qjson_p.h),
// but doesn't include the size of the header (8 bytes)
QByteArray json(raw, qFromLittleEndian<uint>(*(const uint *)(raw + 8)) + 8);
return QJsonDocument::fromBinaryData(json);
}
#ifndef QT_NO_LIBRARY
bool qt_debug_component();
class QLibraryStore;
class QLibraryPrivate
{
public:
#ifdef Q_OS_WIN
HINSTANCE
#else
void *
#endif
pHnd;
enum UnloadFlag { UnloadSys, NoUnloadSys };
QString fileName, qualifiedFileName;
QString fullVersion;
bool load();
bool loadPlugin(); // loads and resolves instance
bool unload(UnloadFlag flag = UnloadSys);
void release();
QFunctionPointer resolve(const char *);
QLibrary::LoadHints loadHints() const
{ return QLibrary::LoadHints(loadHintsInt.load()); }
void setLoadHints(QLibrary::LoadHints lh);
static QLibraryPrivate *findOrCreate(const QString &fileName, const QString &version = QString(),
QLibrary::LoadHints loadHints = 0);
static QStringList suffixes_sys(const QString &fullVersion);
static QStringList prefixes_sys();
QPointer<QObject> inst;
QtPluginInstanceFunction instance;
QJsonObject metaData;
QString errorString;
void updatePluginState();
bool isPlugin();
private:
explicit QLibraryPrivate(const QString &canonicalFileName, const QString &version, QLibrary::LoadHints loadHints);
~QLibraryPrivate();
void mergeLoadHints(QLibrary::LoadHints loadHints);
bool load_sys();
bool unload_sys();
QFunctionPointer resolve_sys(const char *);
QAtomicInt loadHintsInt;
/// counts how many QLibrary or QPluginLoader are attached to us, plus 1 if it's loaded
QAtomicInt libraryRefCount;
/// counts how many times load() or loadPlugin() were called
QAtomicInt libraryUnloadCount;
enum { IsAPlugin, IsNotAPlugin, MightBeAPlugin } pluginState;
friend class QLibraryStore;
};
#endif // QT_NO_LIBRARY
QT_END_NAMESPACE
#endif // QLIBRARY_P_H
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