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 <wtf/text/StringHash.h>
  32
  33 namespace JSC {
  34
  35 ASSERT_CLASS_FITS_IN_CELL(JSCallbackObject<JSNonFinalObject>);
  36 ASSERT_CLASS_FITS_IN_CELL(JSCallbackObject<JSGlobalObject>);
  37
  38 // Define the two types of JSCallbackObjects we support.
  39 template <> const ClassInfo JSCallbackObject<JSNonFinalObject>::s_info = { "CallbackObject", &JSNonFinalObject::s_info, 0, 0, CREATE_METHOD_TABLE(JSCallbackObject) };
  40 template <> const ClassInfo JSCallbackObject<JSGlobalObject>::s_info = { "CallbackGlobalObject", &JSGlobalObject::s_info, 0, 0, CREATE_METHOD_TABLE(JSCallbackObject) };
  41
  42 template <>
  43 Structure* JSCallbackObject<JSNonFinalObject>::createStructure(JSGlobalData& globalData, JSGlobalObject* globalObject, JSValue proto)
  44 {
  45     return Structure::create(globalData, globalObject, proto, TypeInfo(ObjectType, StructureFlags), &s_info);
  46 }
  47
  48 template <>
  49 Structure* JSCallbackObject<JSGlobalObject>::createStructure(JSGlobalData& globalData, JSGlobalObject* globalObject, JSValue proto)
  50 {
  51     return Structure::create(globalData, globalObject, proto, TypeInfo(GlobalObjectType, StructureFlags), &s_info);
  52 }
  53
  54 template <class Parent>
  55 void JSCallbackObject<Parent>::destroy(JSCell* cell)
  56 {
  57     jsCast<JSCallbackObject*>(cell)->JSCallbackObject::~JSCallbackObject();
  58 }
  59
  60 void JSCallbackObjectData::finalize(Handle<Unknown> handle, void* context)
  61 {
  62     JSClassRef jsClass = static_cast<JSClassRef>(context);
  63     JSObjectRef thisRef = toRef(asObject(handle.get()));
  64
  65     for (; jsClass; jsClass = jsClass->parentClass)
  66         if (JSObjectFinalizeCallback finalize = jsClass->finalize)
  67             finalize(thisRef);
  68     WeakSet::deallocate(WeakImpl::asWeakImpl(handle.slot()));
  69 }
  70
  71 } // namespace JSC