src/add-ons/kernel/file_systems/ramfs/BlockReferenceManager.h

   1 // BlockReferenceManager.h
   2
   3 #ifndef BLOCK_REFERENCE_MANAGER_H
   4 #define BLOCK_REFERENCE_MANAGER_H
   5
   6 #include <new>
   7 #include "List.h"
   8
   9 class AllocationInfo;
  10 class BlockReference;
  11
  12 class BlockReferenceManager {
  13 public:
  14         BlockReferenceManager();
  15         ~BlockReferenceManager();
  16
  17         BlockReference *AllocateReference();
  18         void FreeReference(BlockReference *reference);
  19
  20         // debugging only
  21         bool CheckReference(BlockReference *reference);
  22         void GetAllocationInfo(AllocationInfo &info);
  23
  24 private:
  25         status_t _AddTable();
  26
  27 private:
  28         class Table {
  29         public:
  30                 Table() : fSize(0), fReferences(NULL) {}
  31                 Table(int) : fSize(0), fReferences(NULL) {}
  32                 ~Table();
  33
  34                 status_t Init(int32 size);
  35
  36                 BlockReference *GetReferences() { return fReferences; }
  37
  38                 int32 GetSize() const { return fSize; }
  39
  40         private:
  41                 uint32                  fSize;
  42                 BlockReference  *fReferences;
  43         };
  44
  45         List<Table>                     fTables;
  46         BlockReference          *fFreeList;
  47 };
  48
  49 #endif  // BLOCK_REFERENCE_MANAGER_H
  50