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40
41#ifndef QPLUGIN_H
42#define QPLUGIN_H
43
44#include <QtCore/qobject.h>
45#include <QtCore/qpointer.h>
46#include <QtCore/qjsonobject.h>
47
48QT_BEGIN_NAMESPACE
49
50
51#ifndef Q_EXTERN_C
52# ifdef __cplusplus
53# define Q_EXTERN_C extern "C"
54# else
55# define Q_EXTERN_C extern
56# endif
57#endif
58
59inline constexpr unsigned char qPluginArchRequirements()
60{
61 return 0
62#ifndef QT_NO_DEBUG
63 | 1
64#endif
65#ifdef __AVX2__
66 | 2
67# ifdef __AVX512F__
68 | 4
69# endif
70#endif
71 ;
72}
73
74typedef QObject *(*QtPluginInstanceFunction)();
75#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
76typedef const char *(*QtPluginMetaDataFunction)();
77#else
78struct QPluginMetaData
79{
80 const uchar *data;
81 size_t size;
82};
83typedef QPluginMetaData (*QtPluginMetaDataFunction)();
84#endif
85
86
87struct Q_CORE_EXPORT QStaticPlugin
88{
89#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
90public:
91 constexpr QStaticPlugin(QtPluginInstanceFunction i, QtPluginMetaDataFunction m)
92 : instance(i), rawMetaData(m().data), rawMetaDataSize(m().size)
93 {}
94 QtPluginInstanceFunction instance;
95private:
96 // ### Qt 6: revise, as this is not standard-layout
97 const void *rawMetaData;
98 qsizetype rawMetaDataSize;
99public:
100#elif !defined(Q_QDOC)
101 // Note: This struct is initialized using an initializer list.
102 // As such, it cannot have any new constructors or variables.
103 QtPluginInstanceFunction instance;
104 QtPluginMetaDataFunction rawMetaData;
105#else
106 // Since qdoc gets confused by the use of function
107 // pointers, we add these dummes for it to parse instead:
108 QObject *instance();
109 const char *rawMetaData();
110#endif
111 QJsonObject metaData() const;
112};
113Q_DECLARE_TYPEINFO(QStaticPlugin, Q_PRIMITIVE_TYPE);
114
115void Q_CORE_EXPORT qRegisterStaticPluginFunction(QStaticPlugin staticPlugin);
116
117#if (defined(Q_OF_ELF) || defined(Q_OS_WIN)) && (defined (Q_CC_GNU) || defined(Q_CC_CLANG))
118# define QT_PLUGIN_METADATA_SECTION \
119 __attribute__ ((section (".qtmetadata"))) __attribute__((used))
120#elif defined(Q_OS_MAC)
121// TODO: Implement section parsing on Mac
122# define QT_PLUGIN_METADATA_SECTION \
123 __attribute__ ((section ("__TEXT,qtmetadata"))) __attribute__((used))
124#elif defined(Q_CC_MSVC)
125// TODO: Implement section parsing for MSVC
126#pragma section(".qtmetadata",read,shared)
127# define QT_PLUGIN_METADATA_SECTION \
128 __declspec(allocate(".qtmetadata"))
129#else
130# define QT_PLUGIN_METADATA_SECTION
131#endif
132
133
134#define Q_IMPORT_PLUGIN(PLUGIN) \
135 extern const QT_PREPEND_NAMESPACE(QStaticPlugin) qt_static_plugin_##PLUGIN(); \
136 class Static##PLUGIN##PluginInstance{ \
137 public: \
138 Static##PLUGIN##PluginInstance() { \
139 qRegisterStaticPluginFunction(qt_static_plugin_##PLUGIN()); \
140 } \
141 }; \
142 static Static##PLUGIN##PluginInstance static##PLUGIN##Instance;
143
144#if defined(QT_PLUGIN_RESOURCE_INIT_FUNCTION)
145# define QT_PLUGIN_RESOURCE_INIT \
146 extern void QT_PLUGIN_RESOURCE_INIT_FUNCTION(); \
147 QT_PLUGIN_RESOURCE_INIT_FUNCTION();
148#else
149# define QT_PLUGIN_RESOURCE_INIT
150#endif
151
152#define Q_PLUGIN_INSTANCE(IMPLEMENTATION) \
153 { \
154 static QT_PREPEND_NAMESPACE(QPointer)<QT_PREPEND_NAMESPACE(QObject)> _instance; \
155 if (!_instance) { \
156 QT_PLUGIN_RESOURCE_INIT \
157 _instance = new IMPLEMENTATION; \
158 } \
159 return _instance; \
160 }
161
162#if defined(QT_STATICPLUGIN)
163
164#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
165# define QT_MOC_EXPORT_PLUGIN(PLUGINCLASS, PLUGINCLASSNAME) \
166 static QT_PREPEND_NAMESPACE(QObject) *qt_plugin_instance_##PLUGINCLASSNAME() \
167 Q_PLUGIN_INSTANCE(PLUGINCLASS) \
168 static QPluginMetaData qt_plugin_query_metadata_##PLUGINCLASSNAME() \
169 { return { qt_pluginMetaData, sizeof qt_pluginMetaData }; } \
170 const QT_PREPEND_NAMESPACE(QStaticPlugin) qt_static_plugin_##PLUGINCLASSNAME() { \
171 return { qt_plugin_instance_##PLUGINCLASSNAME, qt_plugin_query_metadata_##PLUGINCLASSNAME}; \
172 }
173#else
174# define QT_MOC_EXPORT_PLUGIN(PLUGINCLASS, PLUGINCLASSNAME) \
175 static QT_PREPEND_NAMESPACE(QObject) *qt_plugin_instance_##PLUGINCLASSNAME() \
176 Q_PLUGIN_INSTANCE(PLUGINCLASS) \
177 static const char *qt_plugin_query_metadata_##PLUGINCLASSNAME() { return reinterpret_cast<const char *>(qt_pluginMetaData); } \
178 const QT_PREPEND_NAMESPACE(QStaticPlugin) qt_static_plugin_##PLUGINCLASSNAME() { \
179 QT_PREPEND_NAMESPACE(QStaticPlugin) plugin = { qt_plugin_instance_##PLUGINCLASSNAME, qt_plugin_query_metadata_##PLUGINCLASSNAME}; \
180 return plugin; \
181 }
182#endif
183
184#else
185#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
186
187# define QT_MOC_EXPORT_PLUGIN(PLUGINCLASS, PLUGINCLASSNAME) \
188 Q_EXTERN_C Q_DECL_EXPORT \
189 QPluginMetaData qt_plugin_query_metadata() \
190 { return { qt_pluginMetaData, sizeof qt_pluginMetaData }; } \
191 Q_EXTERN_C Q_DECL_EXPORT QT_PREPEND_NAMESPACE(QObject) *qt_plugin_instance() \
192 Q_PLUGIN_INSTANCE(PLUGINCLASS)
193
194#else
195
196# define QT_MOC_EXPORT_PLUGIN(PLUGINCLASS, PLUGINCLASSNAME) \
197 Q_EXTERN_C Q_DECL_EXPORT \
198 const char *qt_plugin_query_metadata() \
199 { return reinterpret_cast<const char *>(qt_pluginMetaData); } \
200 Q_EXTERN_C Q_DECL_EXPORT QT_PREPEND_NAMESPACE(QObject) *qt_plugin_instance() \
201 Q_PLUGIN_INSTANCE(PLUGINCLASS)
202
203#endif
204
205#endif
206
207#define Q_EXPORT_PLUGIN(PLUGIN) \
208 Q_EXPORT_PLUGIN2(PLUGIN, PLUGIN)
209# define Q_EXPORT_PLUGIN2(PLUGIN, PLUGINCLASS) \
210 Q_STATIC_ASSERT_X(false, "Old plugin system used")
211
212# define Q_EXPORT_STATIC_PLUGIN2(PLUGIN, PLUGINCLASS) \
213 Q_STATIC_ASSERT_X(false, "Old plugin system used")
214
215
216QT_END_NAMESPACE
217
218#endif // Q_PLUGIN_H
219

source code of qtbase/src/corelib/plugin/qplugin.h