1/*
2 * Copyright (C) 2003 Apple Computer, Inc.
3 *
4 * Portions are Copyright (C) 1998 Netscape Communications Corporation.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
19 *
20 * Alternatively, the contents of this file may be used under the terms
21 * of either the Mozilla Public License Version 1.1, found at
22 * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public
23 * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html
24 * (the "GPL"), in which case the provisions of the MPL or the GPL are
25 * applicable instead of those above.  If you wish to allow use of your
26 * version of this file only under the terms of one of those two
27 * licenses (the MPL or the GPL) and not to allow others to use your
28 * version of this file under the LGPL, indicate your decision by
29 * deletingthe provisions above and replace them with the notice and
30 * other provisions required by the MPL or the GPL, as the case may be.
31 * If you do not delete the provisions above, a recipient may use your
32 * version of this file under any of the LGPL, the MPL or the GPL.
33 */
34
35#ifndef RenderArena_h
36#define RenderArena_h
37
38#include "Arena.h"
39#include <wtf/FastAllocBase.h>
40#include <wtf/Noncopyable.h>
41
42namespace WebCore {
43
44static const size_t gMaxRecycledSize = 400;
45
46class RenderArena {
47    WTF_MAKE_NONCOPYABLE(RenderArena); WTF_MAKE_FAST_ALLOCATED;
48public:
49    RenderArena(unsigned arenaSize = 4096);
50    ~RenderArena();
51
52    // Memory management functions
53    void* allocate(size_t);
54    void free(size_t, void*);
55
56#ifdef ANDROID_INSTRUMENT
57    size_t reportPoolSize() const;
58#endif
59
60private:
61    // Underlying arena pool
62    ArenaPool m_pool;
63
64    // The recycler array is sparse with the indices being multiples of 4,
65    // i.e., 0, 4, 8, 12, 16, 20, ...
66    void* m_recyclers[gMaxRecycledSize >> 2];
67};
68
69} // namespace WebCore
70
71#endif // RenderArena_h
72