Source/core/rendering/RenderArena.h - Issue 16896019: Replace RenderArena with PartitionAlloc.

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Issue 16896019: Replace RenderArena with PartitionAlloc. (Closed) Base URL: svn://svn.chromium.org/blink/trunk

Patch Set: Created 7 years, 6 months ago

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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 US A

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 "core/platform/Arena.h"

39 #include "wtf/FastAllocBase.h"

40 #include "wtf/Noncopyable.h"

41 #include "wtf/PassRefPtr.h"

42 #include "wtf/RefCounted.h"

43

44 namespace WebCore {

45

46 static const size_t gMaxRecycledSize = 1024;

47

48 class RenderArena : public RefCounted<RenderArena> {

49 public:

50 static PassRefPtr<RenderArena> create() { return adoptRef(new RenderArena); }

51 ~RenderArena();

52

53 // Memory management functions

54 void* allocate(size_t);

55 void free(size_t, void*);

56

57 size_t totalRenderArenaSize() const { return m_totalSize; }

58 size_t totalRenderArenaAllocatedBytes() const { return m_totalAllocated; }

59

60 private:

61 RenderArena(unsigned arenaSize = 8192);

62

63 // Underlying arena pool

64 ArenaPool m_pool;

65

66 // The mask used to secure the recycled freelist pointers.

67 uintptr_t m_mask;

68 // The recycler array is sparse with the indices being multiples of the

69 // rounding size, sizeof(void*), i.e., 0, 4, 8, 12, 16, 20, ... on 32-bit.

70 static const size_t kRecyclerShift = (sizeof(void*) == 8) ? 3 : 2;

71 void* m_recyclers[gMaxRecycledSize >> kRecyclerShift];

72

73 size_t m_totalSize;

74 size_t m_totalAllocated;

75 };

76

77 } // namespace WebCore

78

79 #endif // RenderArena_h

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« Source/core/css/CSSImageValue.cpp ('K') | « Source/core/rendering/LayoutState.cpp ('k') | Source/core/rendering/RenderArena.cpp » ('j') | Source/core/rendering/RenderObject.cpp » ('J')