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// Copyright (C) 2020 The Qt Company Ltd.
// Copyright (C) 2021 Intel Corporation.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#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/private/qfactoryloader_p.h"
#include "QtCore/qloggingcategory.h"
#include "QtCore/qmutex.h"
#include "QtCore/qplugin.h"
#include "QtCore/qpointer.h"
#include "QtCore/qstringlist.h"
#ifdef Q_OS_WIN
# include "QtCore/qt_windows.h"
#endif
QT_REQUIRE_CONFIG(library);
QT_BEGIN_NAMESPACE
Q_DECLARE_LOGGING_CATEGORY(qt_lcDebugPlugins)
struct QLibraryScanResult
{
qsizetype pos;
qsizetype length;
};
class QLibraryStore;
class QLibraryPrivate
{
public:
#ifdef Q_OS_WIN
using Handle = HINSTANCE;
#else
using Handle = void *;
#endif
enum UnloadFlag { UnloadSys, NoUnloadSys };
const QString fileName;
const QString fullVersion;
bool load();
QtPluginInstanceFunction loadPlugin(); // loads and resolves instance
bool unload(UnloadFlag flag = UnloadSys);
void release();
QFunctionPointer resolve(const char *);
QLibrary::LoadHints loadHints() const
{ return QLibrary::LoadHints(loadHintsInt.loadRelaxed()); }
void setLoadHints(QLibrary::LoadHints lh);
QObject *pluginInstance();
static QLibraryPrivate *findOrCreate(const QString &fileName, const QString &version = QString(),
QLibrary::LoadHints loadHints = { });
static QStringList suffixes_sys(const QString &fullVersion);
static QStringList prefixes_sys();
QAtomicPointer<std::remove_pointer<QtPluginInstanceFunction>::type> instanceFactory;
QAtomicPointer<std::remove_pointer<Handle>::type> pHnd;
// the mutex protects the fields below
QMutex mutex;
QPointer<QObject> inst; // used by QFactoryLoader
QPluginParsedMetaData metaData;
QString errorString;
QString qualifiedFileName;
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;
};
QT_END_NAMESPACE
#endif // QLIBRARY_P_H
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