DiskImage.h

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
#ifndef DISKIMAGE_H
#define DISKIMAGE_H
 
#include "pedigree/kernel/machine/Disk.h"
#include "pedigree/kernel/process/Mutex.h"
#include "pedigree/kernel/utilities/Cache.h"
 
class DiskImage : public Disk {
 public:
  DiskImage() : Disk(), m_pBase(0), m_nSize(0), m_Cache(), m_CacheLock(), m_nAlignPoints(0) {}
 
  virtual ~DiskImage();
 
  bool initialise();
 
  virtual void getName(String& str) {
    str.assign("Hosted disk image");
  }
 
  virtual void dump(String& str) {
    str.assign("Hosted disk image");
  }
 
  virtual BufferView read(uint64_t location);
 
  virtual size_t getSize() const;
 
  virtual size_t getBlockSize() const {
    return 0x10000;
  }
 
  virtual void align(uint64_t location);
 
  virtual bool pin(uint64_t location);
 
  virtual void unpin(uint64_t location);
 
 private:
  uint64_t getAlignmentPoint(uint64_t location) const;
  uint64_t getPageLocation(uint64_t location) const;
 
  void* m_pBase;
  size_t m_nSize;
 
  Cache m_Cache;
  Mutex m_CacheLock;
  uint64_t m_AlignPoints[8];
  size_t m_nAlignPoints;
};
 
#endif