src/DiskIO/DiskThreads/DiskThreadsIOStrategy.h

   1 /*
   2  * Copyright (C) 1996-2017 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 /* DEBUG: section 79    Squid-side Disk I/O functions. */
  10
  11 #ifndef __STORE_DISKTHREADEDIOSTRATEGY_H__
  12 #define __STORE_DISKTHREADEDIOSTRATEGY_H__
  13
  14 #define _AIO_OPEN   0
  15 #define _AIO_READ   1
  16 #define _AIO_WRITE  2
  17 #define _AIO_CLOSE  3
  18 #define _AIO_UNLINK 4
  19 #define _AIO_OPENDIR    5
  20 #define _AIO_STAT   6
  21 #include "DiskIO/DiskIOStrategy.h"
  22
  23 class DiskThreadsIOStrategy : public DiskIOStrategy
  24 {
  25
  26 public:
  27     DiskThreadsIOStrategy();
  28     virtual bool shedLoad();
  29     virtual int load();
  30     virtual RefCount<DiskFile> newFile(char const *path);
  31     virtual bool unlinkdUseful() const;
  32     virtual void unlinkFile (char const *);
  33     virtual int callback();
  34     virtual void sync();
  35     virtual void init();
  36     void done();
  37     /* Todo: add access limitations */
  38     bool initialised;
  39     static DiskThreadsIOStrategy Instance;
  40
  41 private:
  42     static void aioStats(StoreEntry * sentry);
  43     void registerWithCacheManager(void);
  44 };
  45
  46 #endif
  47