Replace RenderArena with PartitionAlloc

Source/core/platform/Arena.cpp

Index: Source/core/platform/Arena.cpp
diff --git a/Source/core/platform/Arena.cpp b/Source/core/platform/Arena.cpp
deleted file mode 100644
index 26b62753fc38862b474f87acf367ad71b5d6b7b2..0000000000000000000000000000000000000000
--- a/Source/core/platform/Arena.cpp
+++ /dev/null
@@ -1,188 +0,0 @@
-/*
- * Copyright (C) 1998-2000 Netscape Communications Corporation.
- * Copyright (C) 2003-6 Apple Computer
- *
- * Other contributors:
- *   Nick Blievers <nickb@adacel.com.au>
- *   Jeff Hostetler <jeff@nerdone.com>
- *   Tom Rini <trini@kernel.crashing.org>
- *   Raffaele Sena <raff@netwinder.org>
- *
- * 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.
- */
-
-/*
- * Lifetime-based fast allocation, inspired by much prior art, including
- * "Fast Allocation and Deallocation of Memory Based on Object Lifetimes"
- * David R. Hanson, Software -- Practice and Experience, Vol. 20(1).
- */
-
-#include "config.h"
-#include "core/platform/Arena.h"
-
-#include <stdlib.h>
-#include <string.h>
-#include <algorithm>
-#include "wtf/Assertions.h"
-#include "wtf/FastMalloc.h"
-
-using namespace std;
-
-namespace WebCore {
-
-#ifdef DEBUG_ARENA_MALLOC
-static int i = 0;
-#endif
-
-#define ARENA_DEFAULT_ALIGN sizeof(double)
-#define BIT(n) ((unsigned int)1 << (n))
-#define BITMASK(n) (BIT(n) - 1)
-#define CEILING_LOG2(_log2, _n)   \
-    unsigned int j_ = (unsigned int)(_n);   \
-    (_log2) = 0;                    \
-    if ((j_) & ((j_)-1))            \
-        (_log2) += 1;               \
-    if ((j_) >> 16)                 \
-        (_log2) += 16, (j_) >>= 16; \
-    if ((j_) >> 8)                  \
-        (_log2) += 8, (j_) >>= 8;   \
-    if ((j_) >> 4)                  \
-        (_log2) += 4, (j_) >>= 4;   \
-    if ((j_) >> 2)                  \
-        (_log2) += 2, (j_) >>= 2;   \
-    if ((j_) >> 1)                  \
-        (_log2) += 1;
-#define FREE_PATTERN 0xDA
-
-static int CeilingLog2(unsigned int i) {
-    int log2;
-    CEILING_LOG2(log2, i);
-    return log2;
-}
-
-void InitArenaPool(ArenaPool* pool, const char*, unsigned size, unsigned align)
-{
-     if (align == 0)
-         align = ARENA_DEFAULT_ALIGN;
-     pool->mask = BITMASK(CeilingLog2(align));
-     pool->first.next = NULL;
-     pool->first.base = pool->first.avail = pool->first.limit = (uword)ARENA_ALIGN(&pool->first + 1);
-     pool->current = &pool->first;
-     pool->arenasize = size;
-}
-
-void* ArenaAllocate(ArenaPool* pool, unsigned int numBytes, unsigned int& bytesAllocated)
-{
-    Arena* arena;
-    char* returnPointer;
-
-    ASSERT((numBytes & pool->mask) == 0);
-
-    numBytes = (uword)ARENA_ALIGN(numBytes);
-
-    // attempt to allocate from arenas at pool->current
-    {
-        arena = pool->current;
-        do {
-            if (arena->avail + numBytes <= arena->limit)  {
-                pool->current = arena;
-                returnPointer = (char *)arena->avail;
-                arena->avail += numBytes;
-                return returnPointer;
-            }
-        } while (NULL != (arena = arena->next));
-    }
-
-    // attempt to allocate from the heap
-    {
-        unsigned int size = max(pool->arenasize, numBytes);
-        size += sizeof *arena + pool->mask;  /* header and alignment slop */
-#ifdef DEBUG_ARENA_MALLOC
-        i++;
-        printf("Malloc: %d\n", i);
-#endif
-        bytesAllocated = size;
-        arena = (Arena*)fastMalloc(size);
-        // fastMalloc will abort() if it fails, so we are guaranteed that a is not 0.
-        arena->limit = (uword)arena + size;
-        arena->base = arena->avail = (uword)ARENA_ALIGN(arena + 1);
-        returnPointer = (char *)arena->avail;
-        arena->avail += numBytes;
-        // the newly allocated arena is linked after pool->current and becomes pool->current.
-        arena->next = pool->current->next;
-        pool->current->next = arena;
-        pool->current = arena;
-        if (!pool->first.next)
-            pool->first.next = arena;
-        return(returnPointer);
-    }
-}
-
-// Free tail arenas linked after head, which may not be the true list head.
-// Reset pool->current to point to head in case it pointed at a tail arena.
-static void FreeArenaList(ArenaPool* pool, Arena* head)
-{
-    Arena** arenaPointer = &head->next;
-    Arena* arena = *arenaPointer;
-    if (!arena)
-        return;
-
-#ifdef DEBUG
-    do {
-        ASSERT(arena->base <= arena->avail && arena->avail <= arena->limit);
-        arena->avail = arena->base;
-        memset((void*)(arena)->avail, FREE_PATTERN, (arena)->limit - (arena)->avail)
-    } while ((arena = arena->next) != 0);
-    arena = *arenaPointer;
-#endif
-
-    do {
-        *arenaPointer = arena->next;
-
-#ifdef DEBUG
-        memset((void*)(arena), FREE_PATTERN, (arena)->limit - (uword)(arena));
-#endif
-
-#ifdef DEBUG_ARENA_MALLOC
-        i--;
-        printf("Free: %d\n", i);
-#endif
-
-        fastFree(arena);
-        arena = 0;
-    } while ((arena = *arenaPointer) != 0);
-    pool->current = head;
-}
-
-void FinishArenaPool(ArenaPool* pool)
-{
-    FreeArenaList(pool, &pool->first);
-}
-
-}