src/fs/ufs/UFSStrategy.h

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  29
  30 #ifndef SQUID_FS_UFS_UFSSTRATEGY_H
  31 #define SQUID_FS_UFS_UFSSTRATEGY_H
  32
  33 #include "DiskIO/DiskFile.h"
  34 #include "StoreIOState.h"
  35
  36 class Swapdir;
  37 class StoreEntry;
  38 class DiskIOStrategy;
  39
  40 namespace Fs
  41 {
  42 namespace Ufs
  43 {
  44 /// \ingroup UFS
  45 class UFSStrategy
  46 {
  47 public:
  48     UFSStrategy (DiskIOStrategy *);
  49     virtual ~UFSStrategy ();
  50     virtual bool shedLoad();
  51
  52     virtual int load();
  53
  54     StoreIOState::Pointer createState(SwapDir *SD, StoreEntry *e, StoreIOState::STIOCB * callback, void *callback_data) const;
  55     /* UFS specific */
  56     virtual RefCount<DiskFile> newFile (char const *path);
  57     StoreIOState::Pointer open(SwapDir *, StoreEntry *, StoreIOState::STFNCB *,
  58                                StoreIOState::STIOCB *, void *);
  59     StoreIOState::Pointer create(SwapDir *, StoreEntry *, StoreIOState::STFNCB *,
  60                                  StoreIOState::STIOCB *, void *);
  61
  62     virtual void unlinkFile (char const *);
  63     virtual void sync();
  64
  65     virtual int callback();
  66
  67     /** Init per-instance logic */
  68     virtual void init();
  69
  70     /** cachemgr output on the IO instance stats */
  71     virtual void statfs(StoreEntry & sentry)const;
  72
  73     /** The io strategy in use */
  74     DiskIOStrategy *io;
  75
  76 protected:
  77
  78     friend class UFSSwapDir;
  79
  80 private:
  81     UFSStrategy(); //disabled
  82     UFSStrategy(UFSStrategy const &); //disabled
  83     UFSStrategy &operator=(UFSStrategy const &); //disabled
  84
  85 };
  86
  87 } //namespace Ufs
  88 } //namespace Fs
  89
  90 #endif /* SQUID_FS_UFS_UFSSTRATEGY_H */