sharelib/DefaultAllocator.h

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#ifndef DEFAULT_ALLOCATOR_H
#define DEFAULT_ALLOCATOR_H

#include "sharelib.h"

#define BITS_ALIGNMENT 8

namespace Share {
  template <
    unsigned char bitsAlignment,
    typename T >
  T genericAlignmenter (T input)
  {
    return
      (
       ((1 << bitsAlignment) - 1) |
       (input - 1)
      ) + 1;
  }

  template <typename T>
  inline T alignmenter (T input) {
    return genericAlignmenter <BITS_ALIGNMENT, T> (input);
  }

  class DefaultAllocator/*: public AbstractAllocator*/ {
    public:
      typedef RelocPtr<char> TRelocPtr;

      DefaultAllocator(void *atAddr, size_t segmentHeaderSize, size_t dataSize) throw (ShareException);
      ~DefaultAllocator();

      static size_t sizeNeeded (size_t segmentHeaderSize, size_t dataSize);

      void *alloc (size_t size) throw (ShareException);

      void free (void *addr) throw ();

      size_t size();

      size_t available();

    private:
      DefaultAllocator (const DefaultAllocator&);
      void operator= (const DefaultAllocator&);

    private:
      size_t size_;
      size_t available_;
      TRelocPtr current_;
  };
}

#endif // DEFAULT_ALLOCATOR_H

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