headers/private/storage/DiskSystemAddOnManager.h

   1 /*
   2  * Copyright 2007, Ingo Weinhold, bonefish@users.sf.net.
   3  * Distributed under the terms of the MIT License.
   4  */
   5 #ifndef _DISK_SYSTEM_ADD_ON_MANAGER_H
   6 #define _DISK_SYSTEM_ADD_ON_MANAGER_H
   7
   8 #include <FindDirectory.h>
   9 #include <List.h>
  10 #include <Locker.h>
  11
  12
  13 class BDiskSystemAddOn;
  14
  15
  16 namespace BPrivate {
  17
  18
  19 class DiskSystemAddOnManager {
  20 public:
  21         static  DiskSystemAddOnManager* Default();
  22
  23                         bool                            Lock();
  24                         void                            Unlock();
  25
  26                         // load/unload all disk system add-ons
  27                         status_t                        LoadDiskSystems();
  28                         void                            UnloadDiskSystems();
  29
  30                         // manager must be locked
  31                         int32                           CountAddOns() const;
  32                         BDiskSystemAddOn*       AddOnAt(int32 index) const;
  33
  34                         // manager will be locked
  35                         BDiskSystemAddOn*       GetAddOn(const char* name);
  36                         void                            PutAddOn(BDiskSystemAddOn* addOn);
  37
  38 private:
  39                         struct AddOnImage;
  40                         struct AddOn;
  41                         struct StringSet;
  42
  43                                                                 DiskSystemAddOnManager();
  44
  45         static  void                            _InitSingleton();
  46
  47                         AddOn*                          _AddOnAt(int32 index) const;
  48                         void                            _PutAddOn(int32 index);
  49
  50                         status_t                        _LoadAddOns(StringSet& alreadyLoaded,
  51                                                                         directory_which directory);
  52
  53 private:
  54                         mutable BLocker         fLock;
  55                         BList                           fAddOns;
  56                         BList                           fAddOnsToBeUnloaded;
  57                         int32                           fLoadCount;
  58
  59         static  DiskSystemAddOnManager* sManager;
  60 };
  61
  62
  63 }       // namespace BPrivate
  64
  65 using BPrivate::DiskSystemAddOnManager;
  66
  67 #endif  // _DISK_SYSTEM_ADD_ON_MANAGER_H