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/*
* Copyright 2012, The Android Open Source Project
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef LinearAllocator_h
#define LinearAllocator_h
namespace WebCore {
class LinearAllocator
{
public:
LinearAllocator();
~LinearAllocator();
void* alloc(size_t size);
void rewindIfLastAlloc(void* ptr, size_t allocSize);
void dumpMemoryStats(const char* prefix = "");
private:
LinearAllocator(const LinearAllocator& other);
class Page;
Page* newPage(size_t pageSize);
bool fitsInCurrentPage(size_t size);
void ensureNext(size_t size);
void* start(Page *p);
void* end(Page* p);
size_t m_pageSize;
size_t m_maxAllocSize;
void* m_next;
Page* m_currentPage;
Page* m_pages;
// Memory usage tracking
size_t m_totalAllocated;
size_t m_wastedSpace;
size_t m_pageCount;
size_t m_dedicatedPageCount;
};
} // namespace WebCore
#endif // LinearAllocator_h
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