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207 lines (164 loc) · 7.35 KB
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/*
* Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
* Copyright (C) 2001 Peter Kelly (pmk@post.com)
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef ClassInfo_h
#define ClassInfo_h
#include "CallFrame.h"
#include "ConstructData.h"
#include "CopyToken.h"
#include "JSCell.h"
namespace JSC {
class JSArrayBufferView;
struct HashTable;
struct MethodTable {
typedef void (*DestroyFunctionPtr)(JSCell*);
DestroyFunctionPtr destroy;
typedef void (*VisitChildrenFunctionPtr)(JSCell*, SlotVisitor&);
VisitChildrenFunctionPtr visitChildren;
typedef void (*CopyBackingStoreFunctionPtr)(JSCell*, CopyVisitor&, CopyToken);
CopyBackingStoreFunctionPtr copyBackingStore;
typedef CallType (*GetCallDataFunctionPtr)(JSCell*, CallData&);
GetCallDataFunctionPtr getCallData;
typedef ConstructType (*GetConstructDataFunctionPtr)(JSCell*, ConstructData&);
GetConstructDataFunctionPtr getConstructData;
typedef void (*PutFunctionPtr)(JSCell*, ExecState*, PropertyName propertyName, JSValue, PutPropertySlot&);
PutFunctionPtr put;
typedef void (*PutByIndexFunctionPtr)(JSCell*, ExecState*, unsigned propertyName, JSValue, bool shouldThrow);
PutByIndexFunctionPtr putByIndex;
typedef bool (*DeletePropertyFunctionPtr)(JSCell*, ExecState*, PropertyName);
DeletePropertyFunctionPtr deleteProperty;
typedef bool (*DeletePropertyByIndexFunctionPtr)(JSCell*, ExecState*, unsigned);
DeletePropertyByIndexFunctionPtr deletePropertyByIndex;
typedef bool (*GetOwnPropertySlotFunctionPtr)(JSObject*, ExecState*, PropertyName, PropertySlot&);
GetOwnPropertySlotFunctionPtr getOwnPropertySlot;
typedef bool (*GetOwnPropertySlotByIndexFunctionPtr)(JSObject*, ExecState*, unsigned, PropertySlot&);
GetOwnPropertySlotByIndexFunctionPtr getOwnPropertySlotByIndex;
typedef JSValue (*ToThisFunctionPtr)(JSCell*, ExecState*, ECMAMode);
ToThisFunctionPtr toThis;
typedef JSValue (*DefaultValueFunctionPtr)(const JSObject*, ExecState*, PreferredPrimitiveType);
DefaultValueFunctionPtr defaultValue;
typedef void (*GetOwnPropertyNamesFunctionPtr)(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
GetOwnPropertyNamesFunctionPtr getOwnPropertyNames;
typedef void (*GetOwnNonIndexPropertyNamesFunctionPtr)(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
GetOwnNonIndexPropertyNamesFunctionPtr getOwnNonIndexPropertyNames;
typedef void (*GetPropertyNamesFunctionPtr)(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
GetPropertyNamesFunctionPtr getPropertyNames;
typedef String (*ClassNameFunctionPtr)(const JSObject*);
ClassNameFunctionPtr className;
typedef bool (*CustomHasInstanceFunctionPtr)(JSObject*, ExecState*, JSValue);
CustomHasInstanceFunctionPtr customHasInstance;
typedef bool (*DefineOwnPropertyFunctionPtr)(JSObject*, ExecState*, PropertyName, const PropertyDescriptor&, bool);
DefineOwnPropertyFunctionPtr defineOwnProperty;
typedef ArrayBuffer* (*SlowDownAndWasteMemory)(JSArrayBufferView*);
SlowDownAndWasteMemory slowDownAndWasteMemory;
typedef PassRefPtr<ArrayBufferView> (*GetTypedArrayImpl)(JSArrayBufferView*);
GetTypedArrayImpl getTypedArrayImpl;
typedef void (*DumpToStreamFunctionPtr)(const JSCell*, PrintStream&);
DumpToStreamFunctionPtr dumpToStream;
};
#define CREATE_MEMBER_CHECKER(member) \
template <typename T> \
struct MemberCheck##member { \
struct Fallback { \
void member(...); \
}; \
struct Derived : T, Fallback { }; \
template <typename U, U> struct Check; \
typedef char Yes[2]; \
typedef char No[1]; \
template <typename U> \
static No &func(Check<void (Fallback::*)(...), &U::member>*); \
template <typename U> \
static Yes &func(...); \
enum { has = sizeof(func<Derived>(0)) == sizeof(Yes) }; \
}
#define HAS_MEMBER_NAMED(klass, name) (MemberCheck##name<klass>::has)
#define CREATE_METHOD_TABLE(ClassName) { \
&ClassName::destroy, \
&ClassName::visitChildren, \
&ClassName::copyBackingStore, \
&ClassName::getCallData, \
&ClassName::getConstructData, \
&ClassName::put, \
&ClassName::putByIndex, \
&ClassName::deleteProperty, \
&ClassName::deletePropertyByIndex, \
&ClassName::getOwnPropertySlot, \
&ClassName::getOwnPropertySlotByIndex, \
&ClassName::toThis, \
&ClassName::defaultValue, \
&ClassName::getOwnPropertyNames, \
&ClassName::getOwnNonIndexPropertyNames, \
&ClassName::getPropertyNames, \
&ClassName::className, \
&ClassName::customHasInstance, \
&ClassName::defineOwnProperty, \
&ClassName::slowDownAndWasteMemory, \
&ClassName::getTypedArrayImpl, \
&ClassName::dumpToStream \
}, \
ClassName::TypedArrayStorageType
struct ClassInfo {
// A string denoting the class name. Example: "Window".
const char* className;
// Pointer to the class information of the base class.
// nullptrif there is none.
const ClassInfo* parentClass;
// Static hash-table of properties.
// For classes that can be used from multiple threads, it is accessed via a getter function
// that would typically return a pointer to a thread-specific value.
const HashTable* propHashTable(ExecState* exec) const
{
if (classPropHashTableGetterFunction)
return &classPropHashTableGetterFunction(exec->vm());
return staticPropHashTable;
}
const HashTable* propHashTable(VM& vm) const
{
if (classPropHashTableGetterFunction)
return &classPropHashTableGetterFunction(vm);
return staticPropHashTable;
}
bool isSubClassOf(const ClassInfo* other) const
{
for (const ClassInfo* ci = this; ci; ci = ci->parentClass) {
if (ci == other)
return true;
}
return false;
}
bool hasStaticProperties() const
{
for (const ClassInfo* ci = this; ci; ci = ci->parentClass) {
if (ci->staticPropHashTable || ci->classPropHashTableGetterFunction)
return true;
}
return false;
}
bool hasStaticSetterOrReadonlyProperties(VM&) const;
const HashTable* staticPropHashTable;
typedef const HashTable& (*ClassPropHashTableGetterFunction)(VM&);
const ClassPropHashTableGetterFunction classPropHashTableGetterFunction;
MethodTable methodTable;
TypedArrayType typedArrayStorageType;
};
} // namespace JSC
#endif // ClassInfo_h