| /**************************************************************************** |
| ** |
| ** Copyright (C) 2015 The Qt Company Ltd. |
| ** Contact: http://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtCore module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL21$ |
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| ** accordance with the commercial license agreement provided with the |
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| ** GNU Lesser General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU Lesser |
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| ** As a special exception, The Qt Company gives you certain additional |
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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/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 |
| |
| #ifndef QT_NO_LIBRARY |
| |
| QT_BEGIN_NAMESPACE |
| |
| 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(); |
| |
| static inline QJsonDocument fromRawMetaData(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>(*(uint *)(raw + 8)) + 8); |
| return QJsonDocument::fromBinaryData(json); |
| } |
| |
| 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 // QT_NO_LIBRARY |
| |
| #endif // QLIBRARY_P_H |