source/resourcemanager.h

   1 #ifndef MSP_GL_RESOURCEMANAGER_H_
   2 #define MSP_GL_RESOURCEMANAGER_H_
   3
   4 #include <msp/core/mutex.h>
   5 #include <msp/core/semaphore.h>
   6 #include <msp/core/thread.h>
   7 #include <msp/datafile/collection.h>
   8 #include "resource.h"
   9
  10 namespace Msp {
  11 namespace GL {
  12
  13 class ResourceManager
  14 {
  15 public:
  16         enum LoadingPolicy
  17         {
  18                 LOAD_IMMEDIATELY,
  19                 LOAD_ON_DEMAND,
  20                 LOAD_MANUALLY
  21         };
  22
  23 private:
  24         struct ManagedResource
  25         {
  26                 Resource *resource;
  27                 DataFile::Collection *collection;
  28                 std::string name;
  29                 IO::Seekable *io;
  30                 Resource::AsyncLoader *loader;
  31
  32                 ManagedResource(Resource &);
  33         };
  34
  35         class LoadingThread: public Thread
  36         {
  37         public:
  38                 enum State
  39                 {
  40                         IDLE,
  41                         SYNC_PENDING,
  42                         BUSY,
  43                         LOAD_FINISHED,
  44                         TERMINATING
  45                 };
  46
  47         private:
  48                 ResourceManager &manager;
  49                 Semaphore sem;
  50                 ManagedResource *volatile resource;
  51                 volatile State state;
  52
  53         public:
  54                 LoadingThread(ResourceManager &);
  55
  56         private:
  57                 virtual void main();
  58
  59         public:
  60                 void set_resource(ManagedResource *);
  61                 ManagedResource *get_resource() const { return resource; }
  62                 void sync();
  63                 State get_state() const { return state; }
  64
  65                 void terminate();
  66         };
  67
  68         typedef std::map<const Resource *, ManagedResource> ResourceMap;
  69         typedef std::list<ManagedResource *> LoadQueue;
  70
  71         LoadingPolicy policy;
  72         bool async_loads;
  73         ResourceMap resources;
  74         LoadQueue queue;
  75         LoadingThread thread;
  76
  77 public:
  78         ResourceManager();
  79         ~ResourceManager();
  80
  81         void set_loading_policy(LoadingPolicy);
  82         void set_async_loads(bool);
  83
  84         void add_resource(Resource &);
  85         void set_resource_location(Resource &, DataFile::Collection &, const std::string &);
  86         void load_resource(const Resource &);
  87         void remove_resource(Resource &);
  88
  89         void tick();
  90 };
  91
  92 } // namespace GL
  93 } // namespace Msp
  94
  95 #endif