API/JSCallbackObject.cpp

   1 /*
   2  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
   3  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include "config.h"
  28 #include "JSCallbackObject.h"
  29
  30 #include "Heap.h"
  31 #include "Operations.h"
  32 #include <wtf/text/StringHash.h>
  33
  34 namespace JSC {
  35
  36 // Define the two types of JSCallbackObjects we support.
  37 template <> const ClassInfo JSCallbackObject<JSDestructibleObject>::s_info = { "CallbackObject", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(JSCallbackObject) };
  38 template <> const ClassInfo JSCallbackObject<JSGlobalObject>::s_info = { "CallbackGlobalObject", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(JSCallbackObject) };
  39
  40 template<> const bool JSCallbackObject<JSDestructibleObject>::needsDestruction = true;
  41 template<> const bool JSCallbackObject<JSGlobalObject>::needsDestruction = false;
  42
  43 template<>
  44 JSCallbackObject<JSGlobalObject>* JSCallbackObject<JSGlobalObject>::create(VM& vm, JSClassRef classRef, Structure* structure)
  45 {
  46     JSCallbackObject<JSGlobalObject>* callbackObject = new (NotNull, allocateCell<JSCallbackObject<JSGlobalObject> >(vm.heap)) JSCallbackObject(vm, classRef, structure);
  47     callbackObject->finishCreation(vm);
  48     vm.heap.addFinalizer(callbackObject, destroy);
  49     return callbackObject;
  50 }
  51
  52 template <>
  53 Structure* JSCallbackObject<JSDestructibleObject>::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto)
  54 {
  55     return Structure::create(vm, globalObject, proto, TypeInfo(ObjectType, StructureFlags), &s_info);
  56 }
  57
  58 template <>
  59 Structure* JSCallbackObject<JSGlobalObject>::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto)
  60 {
  61     return Structure::create(vm, globalObject, proto, TypeInfo(GlobalObjectType, StructureFlags), &s_info);
  62 }
  63
  64 void JSCallbackObjectData::finalize(Handle<Unknown> handle, void* context)
  65 {
  66     JSClassRef jsClass = static_cast<JSClassRef>(context);
  67     JSObjectRef thisRef = toRef(static_cast<JSObject*>(handle.get().asCell()));
  68
  69     for (; jsClass; jsClass = jsClass->parentClass)
  70         if (JSObjectFinalizeCallback finalize = jsClass->finalize)
  71             finalize(thisRef);
  72     WeakSet::deallocate(WeakImpl::asWeakImpl(handle.slot()));
  73 }
  74
  75 } // namespace JSC