WebKit/Source/JavaScriptCore/API/JSCallbackObject.h at main · WebKit/WebKit · GitHub

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* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

* 1. Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

* 2. Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in the

* documentation and/or other materials provided with the distribution.

* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR

* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef JSCallbackObject_h

#define JSCallbackObject_h

#if JSC_OBJC_API_ENABLED || defined(JSC_GLIB_API_ENABLED)

#include "JSAPIWrapperObject.h"

#endif

#if defined(JSC_GLIB_API_ENABLED)

#include "JSAPIWrapperGlobalObject.h"

#endif

#include "JSBase.h"

#include "JSGlobalObject.h"

#include "JSObject.h"

#include "JSObjectRef.h"

#include "JSValueRef.h"

#include <wtf/Platform.h>

namespace JSC {

struct JSCallbackObjectData {

WTF_DEPRECATED_MAKE_FAST_ALLOCATED(JSCallbackObjectData);

public:

JSCallbackObjectData(void* privateData, JSClassRef jsClass)

: privateData(privateData)

, jsClass(jsClass)

{

JSClassRetain(jsClass);

}

~JSCallbackObjectData()

{

JSClassRelease(jsClass);

}

JSValue getPrivateProperty(const Identifier& propertyName) const

{

if (!m_privateProperties)

return JSValue();

return m_privateProperties->getPrivateProperty(propertyName);

}

void setPrivateProperty(VM& vm, JSCell* owner, const Identifier& propertyName, JSValue value)

{

if (!m_privateProperties)

m_privateProperties = makeUnique<JSPrivatePropertyMap>();

m_privateProperties->setPrivateProperty(vm, owner, propertyName, value);

}

void deletePrivateProperty(const Identifier& propertyName)

{

if (!m_privateProperties)

return;

m_privateProperties->deletePrivateProperty(propertyName);

}

DECLARE_VISIT_CHILDREN;

template<typename Visitor>

void visitChildren(Visitor& visitor)

{

JSPrivatePropertyMap* properties = m_privateProperties.get();

if (!properties)

return;

properties->visitChildren(visitor);

}

void* privateData;

JSClassRef jsClass;

struct JSPrivatePropertyMap {

WTF_DEPRECATED_MAKE_FAST_ALLOCATED(JSPrivatePropertyMap);

public:

JSValue getPrivateProperty(const Identifier& propertyName) const

{

PrivatePropertyMap::const_iterator location = m_propertyMap.find(propertyName.impl());

if (location == m_propertyMap.end())

return JSValue();

return location->value.get();

}

void setPrivateProperty(VM& vm, JSCell* owner, const Identifier& propertyName, JSValue value)

{

Locker locker { m_lock };

WriteBarrier<Unknown> empty;

m_propertyMap.add(propertyName.impl(), empty).iterator->value.set(vm, owner, value);

}

void deletePrivateProperty(const Identifier& propertyName)

{

Locker locker { m_lock };

m_propertyMap.remove(propertyName.impl());

}

template<typename Visitor>

void visitChildren(Visitor& visitor)

{

Locker locker { m_lock };

for (auto& pair : m_propertyMap) {

if (pair.value)

visitor.append(pair.value);

}

private:

typedef UncheckedKeyHashMap<RefPtr<UniquedStringImpl>, WriteBarrier<Unknown>, IdentifierRepHash> PrivatePropertyMap;

PrivatePropertyMap m_propertyMap;

Lock m_lock;

};

std::unique_ptr<JSPrivatePropertyMap> m_privateProperties;

};

template <class Parent>

class JSCallbackObject final : public Parent {

public:

using Base = Parent;

static_assert(!(StructureFlags & ImplementsDefaultHasInstance), "using customHasInstance");

~JSCallbackObject();

static JSCallbackObject* create(JSGlobalObject* globalObject, Structure* structure, JSClassRef classRef, void* data)

{

VM& vm = getVM(globalObject);

ASSERT_UNUSED(globalObject, !structure->realm() || structure->realm() == globalObject);

JSCallbackObject* callbackObject = new (NotNull, allocateCell<JSCallbackObject>(vm)) JSCallbackObject(globalObject, structure, classRef, data);

callbackObject->finishCreation(globalObject);

return callbackObject;

}

static JSCallbackObject<Parent>* create(VM&, JSClassRef, Structure*);

static const DestructionMode needsDestruction;

static void destroy(JSCell* cell)

{

static_cast<JSCallbackObject*>(cell)->JSCallbackObject::~JSCallbackObject();

}

template<typename CellType, SubspaceAccess mode>

static GCClient::IsoSubspace* subspaceFor(VM& vm)

{

return subspaceForImpl(vm, mode);

}

void setPrivate(void* data);

void* getPrivate();

DECLARE_INFO;

JSClassRef classRef() const { return m_callbackObjectData->jsClass; }

bool inherits(JSClassRef) const;

static Structure* createStructure(VM&, JSGlobalObject*, JSValue);

JSValue getPrivateProperty(const Identifier& propertyName) const

{

return m_callbackObjectData->getPrivateProperty(propertyName);

}

void setPrivateProperty(VM& vm, const Identifier& propertyName, JSValue value)

{

m_callbackObjectData->setPrivateProperty(vm, this, propertyName, value);

}

void deletePrivateProperty(const Identifier& propertyName)

{

m_callbackObjectData->deletePrivateProperty(propertyName);

}

using Parent::methodTable;

static EncodedJSValue callImpl(JSGlobalObject*, CallFrame*);

static EncodedJSValue constructImpl(JSGlobalObject*, CallFrame*);

static EncodedJSValue staticFunctionGetterImpl(JSGlobalObject*, EncodedJSValue, PropertyName);

static EncodedJSValue callbackGetterImpl(JSGlobalObject*, EncodedJSValue, PropertyName);

DECLARE_VISIT_CHILDREN;

private:

JSCallbackObject(JSGlobalObject*, Structure*, JSClassRef, void* data);

JSCallbackObject(VM&, JSClassRef, Structure*);

void finishCreation(JSGlobalObject*);

void finishCreation(VM&);

static GCClient::IsoSubspace* subspaceForImpl(VM&, SubspaceAccess);

static EncodedJSValue JSC_HOST_CALL_ATTRIBUTES customToPrimitive(JSGlobalObject*, CallFrame*);

static bool getOwnPropertySlot(JSObject*, JSGlobalObject*, PropertyName, PropertySlot&);

static bool getOwnPropertySlotByIndex(JSObject*, JSGlobalObject*, unsigned propertyName, PropertySlot&);

static bool put(JSCell*, JSGlobalObject*, PropertyName, JSValue, PutPropertySlot&);

static bool putByIndex(JSCell*, JSGlobalObject*, unsigned, JSValue, bool shouldThrow);

static bool deleteProperty(JSCell*, JSGlobalObject*, PropertyName, DeletePropertySlot&);

static bool deletePropertyByIndex(JSCell*, JSGlobalObject*, unsigned);

static bool customHasInstance(JSObject*, JSGlobalObject*, JSValue);

static void getOwnSpecialPropertyNames(JSObject*, JSGlobalObject*, PropertyNameArrayBuilder&, DontEnumPropertiesMode);

static CallData getConstructData(JSCell*);

static CallData getCallData(JSCell*);

void init(JSGlobalObject*);

static JSCallbackObject* asCallbackObject(JSValue);

static JSCallbackObject* asCallbackObject(EncodedJSValue);

using RawNativeFunction = EncodedJSValue(JSC_HOST_CALL_ATTRIBUTES*)(JSGlobalObject*, CallFrame*);

static RawNativeFunction getCallFunction();

static RawNativeFunction getConstructFunction();

static GetValueFunc getStaticFunctionGetter();

static GetValueFunc getCallbackGetter();

JSValue getStaticValue(JSGlobalObject*, PropertyName);

std::unique_ptr<JSCallbackObjectData> m_callbackObjectData;

const ClassInfo* m_classInfo { nullptr };

};

template <class Parent>

template<typename Visitor>

void JSCallbackObject<Parent>::visitChildrenImpl(JSCell* cell, Visitor& visitor)

{

JSCallbackObject* thisObject = uncheckedDowncast<JSCallbackObject>(cell);

ASSERT_GC_OBJECT_INHERITS((static_cast<Parent*>(thisObject)), JSCallbackObject<Parent>::info());

Parent::visitChildren(thisObject, visitor);

thisObject->m_callbackObjectData->visitChildren(visitor);

}

// JSCallbackObject<T>::info()'s forward definition triggers an undefined template var warning

// without these declarations in the same translation unit.

template<> const ClassInfo JSCallbackObject<JSGlobalObject>::s_info;

template<> const ClassInfo JSCallbackObject<JSNonFinalObject>::s_info;

#if defined(JSC_GLIB_API_ENABLED)

template<> const ClassInfo JSCallbackObject<JSAPIWrapperGlobalObject>::s_info;

#endif

#if JSC_OBJC_API_ENABLED || defined(JSC_GLIB_API_ENABLED)

template<> const ClassInfo JSCallbackObject<JSAPIWrapperObject>::s_info;

#endif

} // namespace JSC

// include the actual template class implementation

#include "JSCallbackObjectFunctions.h"

#endif // JSCallbackObject_h

WebKit/Source/JavaScriptCore/API/JSCallbackObject.h at main · WebKit/WebKit · GitHub

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