| /**************************************************************************** |
| ** |
| ** 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. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
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| ** GNU Lesser General Public License Usage |
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| ** General Public License version 3 as published by the Free Software |
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| ** packaging of this file. Please review the following information to |
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| ** |
| ** 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 |
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| ****************************************************************************/ |
| |
| #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/private/qglobal_p.h> |
| #include "QtCore/qlibrary.h" |
| #include "QtCore/qmutex.h" |
| #include "QtCore/qpointer.h" |
| #include "QtCore/qstringlist.h" |
| #include "QtCore/qplugin.h" |
| #ifdef Q_OS_WIN |
| # include "QtCore/qt_windows.h" |
| #endif |
| |
| QT_REQUIRE_CONFIG(library); |
| |
| QT_BEGIN_NAMESPACE |
| |
| bool qt_debug_component(); |
| |
| 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 |
| QJsonObject 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 |