src/DiskIO/DiskIOModule.h

   1 /*
   2  * Copyright (C) 1996-2014 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 #ifndef SQUID_DISKIOMODULE_H
  10 #define SQUID_DISKIOMODULE_H
  11
  12 #include <vector>
  13
  14 /* forward decls */
  15
  16 class CacheManager;
  17
  18 class DiskIOStrategy;
  19
  20 class DiskIOModule
  21 {
  22
  23 public:
  24     static void SetupAllModules();
  25     static void ModuleAdd(DiskIOModule &);
  26     static void FreeAllModules();
  27
  28     /** Poke all compiled modules for self-setup */
  29     static void PokeAllModules();
  30
  31     static DiskIOModule *Find(char const *type);
  32
  33     /** Find *any* usable disk module. This will look for the 'best'
  34      * available module for this system.
  35      */
  36     static DiskIOModule *FindDefault();
  37     static std::vector<DiskIOModule*> const &Modules();
  38     typedef std::vector<DiskIOModule*>::iterator iterator;
  39     typedef std::vector<DiskIOModule*>::const_iterator const_iterator;
  40     DiskIOModule();
  41     virtual ~DiskIOModule() {}
  42
  43     virtual void init() = 0;
  44     //virtual void registerWithCacheManager(void);
  45     virtual void gracefulShutdown() = 0;
  46     virtual DiskIOStrategy *createStrategy() = 0;
  47
  48     virtual char const *type () const = 0;
  49     // Not implemented
  50     DiskIOModule(DiskIOModule const &);
  51     DiskIOModule &operator=(DiskIOModule const&);
  52
  53 protected:
  54     //bool initialised;
  55     static void RegisterAllModulesWithCacheManager(void);
  56
  57 private:
  58     static std::vector<DiskIOModule*> &GetModules();
  59     static std::vector<DiskIOModule*> *_Modules;
  60 };
  61
  62 #endif /* SQUID_DISKIOMODULE_H */