source: webkit/trunk/JavaScriptCore/runtime/InternalFunction.h@ 47620

Last change on this file since 47620 was 47267, checked in by [email protected], 16 years ago

Devirtualise marking
https://bugs.webkit.org/show_bug.cgi?id=28294

Reviewed by Maciej Stachowiak.

Add a bit to TypeInfo to indicate that an object uses the standard
JSObject::markChildren method. This allows us to devirtualise marking
of most objects (though a branch is still needed). We also add a branch
to identify arrays thus devirtualising marking in that case as well.

In order to make the best use of this devirtualisation I've also reworked
the MarkStack::drain() logic to make the iteration more efficient.

  • Property svn:eol-style set to native
File size: 2.2 KB
Line 
1/*
2 * Copyright (C) 1999-2000 Harri Porten ([email protected])
3 * Copyright (C) 2003, 2006, 2007, 2008 Apple Inc. All rights reserved.
4 * Copyright (C) 2007 Cameron Zwarich ([email protected])
5 * Copyright (C) 2007 Maks Orlovich
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 *
22 */
23
24#ifndef InternalFunction_h
25#define InternalFunction_h
26
27#include "JSObject.h"
28#include "Identifier.h"
29
30namespace JSC {
31
32 class FunctionPrototype;
33
34 class InternalFunction : public JSObject {
35 public:
36 virtual const ClassInfo* classInfo() const;
37 static JS_EXPORTDATA const ClassInfo info;
38
39 const UString& name(JSGlobalData*);
40 const UString displayName(JSGlobalData*);
41 const UString calculatedDisplayName(JSGlobalData*);
42
43 static PassRefPtr<Structure> createStructure(JSValue proto)
44 {
45 return Structure::create(proto, TypeInfo(ObjectType, ImplementsHasInstance | HasStandardGetOwnPropertySlot | HasDefaultMark));
46 }
47
48 protected:
49 InternalFunction(PassRefPtr<Structure> structure) : JSObject(structure) { }
50 InternalFunction(JSGlobalData*, PassRefPtr<Structure>, const Identifier&);
51
52 private:
53 virtual CallType getCallData(CallData&) = 0;
54 };
55
56 InternalFunction* asInternalFunction(JSValue);
57
58 inline InternalFunction* asInternalFunction(JSValue value)
59 {
60 ASSERT(asObject(value)->inherits(&InternalFunction::info));
61 return static_cast<InternalFunction*>(asObject(value));
62 }
63
64} // namespace JSC
65
66#endif // InternalFunction_h
Note: See TracBrowser for help on using the repository browser.