prime/include/Kyoto/Alloc/CSmallAllocPool.hpp

#ifndef __CSMALLALLOCPOOL_HPP__
#define __CSMALLALLOCPOOL_HPP__

#include <types.h>

#include <Kyoto/Alloc/AllocatorCommon.hpp>

class CSmallAllocPool {
public:
  CSmallAllocPool(uint len, void* mainData, void* bookKeeping);
  void* FindFree(int len);
  void* Alloc(uint size);
  bool Free(const void* ptr);

private:
  bool PtrWithinPool(const void* ptr) const {
    return u32((reinterpret_cast< const u8* >(ptr) - reinterpret_cast< u8* >(x0_mainData)) / 4) < x8_numBlocks;
  }

  uint GetIndexFromPtr(const void* ptr) const { return ((const u8*)ptr - x0_mainData) / kPointerSize; }
  long GetEntryValue(uint idx) const { return (long)*((u8*)x4_bookKeeping + idx); }
  u8* GetPtrFromIndex(unsigned int idx) const { return static_cast< u8* >(x0_mainData) + (idx << 3); }

  uint GetNumBlocksAvailable() const { return x18_numBlocksAvailable; }
  uint GetTotalEntries() const { return x8_numBlocks; }
  uint GetAllocatedSize() const { return x8_numBlocks - x18_numBlocksAvailable; }
  uint GetNumAllocs() const { return x1c_numAllocs; }

private:

  void* x0_mainData;
  void* x4_bookKeeping;
  int x8_numBlocks;
  void* xc_cachedBookKeepingOffset;
  int x10_;
  int x14_;
  uint x18_numBlocksAvailable;
  uint x1c_numAllocs;
};
#endif // __CSMALLALLOCPOOL_HPP__