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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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Chromium Code Reviews
Issue 20231002:
Replace RenderArena with PartitionAlloc (Closed)
Base URL: svn://svn.chromium.org/blink/trunk