BitAllocator.h

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/*
 * Copyright (C) 2015 Niek Linnenbank
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef __LIBALLOC_BITALLOCATOR_H
#define __LIBALLOC_BITALLOCATOR_H
 
#include <BitArray.h>
#include <Types.h>
#include "Allocator.h"
 
class BitAllocator : public Allocator
{
  public:
 
    BitAllocator(const Range range,
                 const Size chunkSize,
                 u8 *bitmap = ZERO);
 
    Size chunkSize() const;
 
    virtual Size available() const;
 
    virtual Result allocate(Range & args);
 
    Result allocateFrom(Range & args, const Size startBit);
 
    Result allocateAt(const Address addr);
 
    bool isAllocated(const Address page) const;
 
    virtual Result release(const Address chunk);
 
  private:
 
    BitArray m_array;
 
    const Size m_chunkSize;
 
    Size m_lastBit;
};
 
#endif /* __LIBALLOC_BITALLOCATOR_H */