src/bin/makeudfimage/PhysicalPartitionAllocator.h

   1 //----------------------------------------------------------------------
   2 //  This software is part of the OpenBeOS distribution and is covered
   3 //  by the MIT License.
   4 //
   5 //  Copyright (c) 2003 Tyler Dauwalder, tyler@dauwalder.net
   6 //----------------------------------------------------------------------
   7
   8 /*! \file PhysicalPartitionAllocator.h
   9
  10         Udf physical partition allocator (declarations).
  11 */
  12
  13 #ifndef _PHYSICAL_PARTITION_ALLOCATOR_H
  14 #define _PHYSICAL_PARTITION_ALLOCATOR_H
  15
  16 #include <list>
  17
  18 #include "Allocator.h"
  19 #include "UdfStructures.h"
  20
  21 /*! \brief Allocates blocks and extents from a Udf physical partition.
  22 */
  23 class PhysicalPartitionAllocator {
  24 public:
  25         PhysicalPartitionAllocator(uint16 number, uint32 offset, Allocator &allocator);
  26
  27         status_t GetNextBlock(uint32 &block, uint32 &physicalBlock);
  28         status_t GetNextExtent(uint32 length, bool contiguous, long_address &extent,
  29                                extent_address &physicalExtent = dummyExtent);
  30         status_t GetNextExtents(off_t length, std::list<long_address> &extents,
  31                                 std::list<extent_address> &physicalExtents);
  32
  33
  34         uint16 PartitionNumber() const { return fNumber; }
  35         uint32 Length() const;
  36 private:
  37         static extent_address dummyExtent;
  38         uint16 fNumber; //!< The partition number of this partition
  39         uint32 fOffset; //!< The offset of the start of this partition in physical space
  40         Allocator &fAllocator;
  41 };
  42
  43 #endif  // _PHYSICAL_PARTITION_ALLOCATOR_H