auto import from //depot/cupcake/@135843

1 files changed, 64 insertions, 0 deletions

diff --git a/WebCore/rendering/RenderArena.h b/WebCore/rendering/RenderArena.h
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+++ b/WebCore/rendering/RenderArena.h
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+/*
+ * Copyright (C) 2003 Apple Computer, Inc.
+ *
+ * Portions are Copyright (C) 1998 Netscape Communications Corporation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Alternatively, the contents of this file may be used under the terms
+ * of either the Mozilla Public License Version 1.1, found at
+ * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public
+ * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html
+ * (the "GPL"), in which case the provisions of the MPL or the GPL are
+ * applicable instead of those above.  If you wish to allow use of your
+ * version of this file only under the terms of one of those two
+ * licenses (the MPL or the GPL) and not to allow others to use your
+ * version of this file under the LGPL, indicate your decision by
+ * deletingthe provisions above and replace them with the notice and
+ * other provisions required by the MPL or the GPL, as the case may be.
+ * If you do not delete the provisions above, a recipient may use your
+ * version of this file under any of the LGPL, the MPL or the GPL.
+ */
+
+#ifndef RenderArena_h
+#define RenderArena_h
+
+#include "Arena.h"
+
+namespace WebCore {
+
+static const size_t gMaxRecycledSize = 400;
+
+class RenderArena {
+public:
+    RenderArena(unsigned arenaSize = 4096);
+    ~RenderArena();
+
+    // Memory management functions
+    void* allocate(size_t);
+    void free(size_t, void*);
+
+private:
+    // Underlying arena pool
+    ArenaPool m_pool;
+
+    // The recycler array is sparse with the indices being multiples of 4,
+    // i.e., 0, 4, 8, 12, 16, 20, ...
+    void* m_recyclers[gMaxRecycledSize >> 2];
+};
+
+} // namespace WebCore
+
+#endif // RenderArena_h