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39 | #ifndef QV4LOOKUP_H |
40 | #define QV4LOOKUP_H |
41 | |
42 | // |
43 | // W A R N I N G |
44 | // ------------- |
45 | // |
46 | // This file is not part of the Qt API. It exists purely as an |
47 | // implementation detail. This header file may change from version to |
48 | // version without notice, or even be removed. |
49 | // |
50 | // We mean it. |
51 | // |
52 | |
53 | #include "qv4global_p.h" |
54 | #include "qv4runtime_p.h" |
55 | #include "qv4engine_p.h" |
56 | #include "qv4context_p.h" |
57 | #include "qv4object_p.h" |
58 | #include "qv4internalclass_p.h" |
59 | |
60 | QT_BEGIN_NAMESPACE |
61 | |
62 | namespace QV4 { |
63 | |
64 | struct Q_QML_PRIVATE_EXPORT Lookup { |
65 | union { |
66 | ReturnedValue (*getter)(Lookup *l, ExecutionEngine *engine, const Value &object); |
67 | ReturnedValue (*globalGetter)(Lookup *l, ExecutionEngine *engine); |
68 | ReturnedValue (*qmlContextPropertyGetter)(Lookup *l, ExecutionEngine *engine, Value *thisObject); |
69 | bool (*setter)(Lookup *l, ExecutionEngine *engine, Value &object, const Value &v); |
70 | }; |
71 | // NOTE: gc assumes the first two entries in the struct are pointers to heap objects or null |
72 | union { |
73 | struct { |
74 | Heap::Base *h1; |
75 | Heap::Base *h2; |
76 | quintptr unused; |
77 | quintptr unused2; |
78 | } markDef; |
79 | struct { |
80 | Heap::InternalClass *ic; |
81 | quintptr unused; |
82 | uint index; |
83 | uint offset; |
84 | } objectLookup; |
85 | struct { |
86 | quintptr protoId; |
87 | quintptr _unused; |
88 | const Value *data; |
89 | } protoLookup; |
90 | struct { |
91 | Heap::InternalClass *ic; |
92 | Heap::InternalClass *ic2; |
93 | uint offset; |
94 | uint offset2; |
95 | } objectLookupTwoClasses; |
96 | struct { |
97 | quintptr protoId; |
98 | quintptr protoId2; |
99 | const Value *data; |
100 | const Value *data2; |
101 | } protoLookupTwoClasses; |
102 | struct { |
103 | // Make sure the next two values are in sync with protoLookup |
104 | quintptr protoId; |
105 | Heap::Object *proto; |
106 | const Value *data; |
107 | quintptr type; |
108 | } primitiveLookup; |
109 | struct { |
110 | Heap::InternalClass *newClass; |
111 | quintptr protoId; |
112 | uint offset; |
113 | uint unused; |
114 | } insertionLookup; |
115 | struct { |
116 | quintptr _unused; |
117 | quintptr _unused2; |
118 | uint index; |
119 | uint unused; |
120 | } indexedLookup; |
121 | struct { |
122 | Heap::InternalClass *ic; |
123 | Heap::InternalClass *qmlTypeIc; // only used when lookup goes through QQmlTypeWrapper |
124 | QQmlPropertyCache *propertyCache; |
125 | QQmlPropertyData *propertyData; |
126 | } qobjectLookup; |
127 | struct { |
128 | Heap::InternalClass *ic; |
129 | quintptr unused; |
130 | QQmlPropertyCache *propertyCache; |
131 | QQmlPropertyData *propertyData; |
132 | } qgadgetLookup; |
133 | struct { |
134 | quintptr unused1; |
135 | quintptr unused2; |
136 | int scriptIndex; |
137 | } qmlContextScriptLookup; |
138 | struct { |
139 | Heap::Object *singleton; |
140 | quintptr unused; |
141 | } qmlContextSingletonLookup; |
142 | struct { |
143 | quintptr unused1; |
144 | quintptr unused2; |
145 | int objectId; |
146 | } qmlContextIdObjectLookup; |
147 | struct { |
148 | // Same as protoLookup, as used for global lookups |
149 | quintptr reserved1; |
150 | quintptr reserved2; |
151 | quintptr reserved3; |
152 | ReturnedValue (*getterTrampoline)(Lookup *l, ExecutionEngine *engine); |
153 | } qmlContextGlobalLookup; |
154 | struct { |
155 | Heap::Object *qmlTypeWrapper; |
156 | quintptr unused2; |
157 | } qmlTypeLookup; |
158 | struct { |
159 | Heap::InternalClass *ic; |
160 | quintptr unused; |
161 | ReturnedValue encodedEnumValue; |
162 | } qmlEnumValueLookup; |
163 | struct { |
164 | Heap::InternalClass *ic; |
165 | Heap::Object *qmlScopedEnumWrapper; |
166 | } qmlScopedEnumWrapperLookup; |
167 | }; |
168 | uint nameIndex; |
169 | |
170 | ReturnedValue resolveGetter(ExecutionEngine *engine, const Object *object); |
171 | ReturnedValue resolvePrimitiveGetter(ExecutionEngine *engine, const Value &object); |
172 | ReturnedValue resolveGlobalGetter(ExecutionEngine *engine); |
173 | void resolveProtoGetter(PropertyKey name, const Heap::Object *proto); |
174 | |
175 | static ReturnedValue getterGeneric(Lookup *l, ExecutionEngine *engine, const Value &object); |
176 | static ReturnedValue getterTwoClasses(Lookup *l, ExecutionEngine *engine, const Value &object); |
177 | static ReturnedValue getterFallback(Lookup *l, ExecutionEngine *engine, const Value &object); |
178 | |
179 | static ReturnedValue getter0MemberData(Lookup *l, ExecutionEngine *engine, const Value &object); |
180 | static ReturnedValue getter0Inline(Lookup *l, ExecutionEngine *engine, const Value &object); |
181 | static ReturnedValue getterProto(Lookup *l, ExecutionEngine *engine, const Value &object); |
182 | static ReturnedValue getter0Inlinegetter0Inline(Lookup *l, ExecutionEngine *engine, const Value &object); |
183 | static ReturnedValue getter0Inlinegetter0MemberData(Lookup *l, ExecutionEngine *engine, const Value &object); |
184 | static ReturnedValue getter0MemberDatagetter0MemberData(Lookup *l, ExecutionEngine *engine, const Value &object); |
185 | static ReturnedValue getterProtoTwoClasses(Lookup *l, ExecutionEngine *engine, const Value &object); |
186 | static ReturnedValue getterAccessor(Lookup *l, ExecutionEngine *engine, const Value &object); |
187 | static ReturnedValue getterProtoAccessor(Lookup *l, ExecutionEngine *engine, const Value &object); |
188 | static ReturnedValue getterProtoAccessorTwoClasses(Lookup *l, ExecutionEngine *engine, const Value &object); |
189 | static ReturnedValue getterIndexed(Lookup *l, ExecutionEngine *engine, const Value &object); |
190 | |
191 | static ReturnedValue primitiveGetterProto(Lookup *l, ExecutionEngine *engine, const Value &object); |
192 | static ReturnedValue primitiveGetterAccessor(Lookup *l, ExecutionEngine *engine, const Value &object); |
193 | static ReturnedValue stringLengthGetter(Lookup *l, ExecutionEngine *engine, const Value &object); |
194 | |
195 | static ReturnedValue globalGetterGeneric(Lookup *l, ExecutionEngine *engine); |
196 | static ReturnedValue globalGetterProto(Lookup *l, ExecutionEngine *engine); |
197 | static ReturnedValue globalGetterProtoAccessor(Lookup *l, ExecutionEngine *engine); |
198 | |
199 | bool resolveSetter(ExecutionEngine *engine, Object *object, const Value &value); |
200 | static bool setterGeneric(Lookup *l, ExecutionEngine *engine, Value &object, const Value &value); |
201 | Q_NEVER_INLINE static bool setterTwoClasses(Lookup *l, ExecutionEngine *engine, Value &object, const Value &value); |
202 | static bool setterFallback(Lookup *l, ExecutionEngine *engine, Value &object, const Value &value); |
203 | static bool setter0MemberData(Lookup *l, ExecutionEngine *engine, Value &object, const Value &value); |
204 | static bool setter0Inline(Lookup *l, ExecutionEngine *engine, Value &object, const Value &value); |
205 | static bool setter0setter0(Lookup *l, ExecutionEngine *engine, Value &object, const Value &value); |
206 | static bool setterInsert(Lookup *l, ExecutionEngine *engine, Value &object, const Value &value); |
207 | static bool arrayLengthSetter(Lookup *l, ExecutionEngine *engine, Value &object, const Value &value); |
208 | |
209 | void markObjects(MarkStack *stack) { |
210 | if (markDef.h1 && !(reinterpret_cast<quintptr>(markDef.h1) & 1)) |
211 | markDef.h1->mark(markStack: stack); |
212 | if (markDef.h2 && !(reinterpret_cast<quintptr>(markDef.h2) & 1)) |
213 | markDef.h2->mark(markStack: stack); |
214 | } |
215 | |
216 | void clear() { |
217 | memset(s: &markDef, c: 0, n: sizeof(markDef)); |
218 | } |
219 | }; |
220 | |
221 | Q_STATIC_ASSERT(std::is_standard_layout<Lookup>::value); |
222 | // Ensure that these offsets are always at this point to keep generated code compatible |
223 | // across 32-bit and 64-bit (matters when cross-compiling). |
224 | Q_STATIC_ASSERT(offsetof(Lookup, getter) == 0); |
225 | |
226 | } |
227 | |
228 | QT_END_NAMESPACE |
229 | |
230 | #endif |
231 | |