1 #ifndef MSP_GL_RESOURCEMANAGER_H_
2 #define MSP_GL_RESOURCEMANAGER_H_
6 #include <msp/core/mutex.h>
7 #include <msp/core/semaphore.h>
8 #include <msp/core/thread.h>
9 #include <msp/datafile/collection.h>
15 class ResourceObserver;
17 class resource_load_error: public std::runtime_error
20 resource_load_error(const std::string &, const std::string &);
21 resource_load_error(const std::string &, const std::exception &);
22 virtual ~resource_load_error() throw() { }
36 struct ResourceLocation
38 DataFile::Collection *collection;
42 ResourceLocation(DataFile::Collection &, const std::string &);
46 struct ManagedResource
59 ResourceLocation location;
62 Resource::AsyncLoader *loader;
65 std::uint64_t data_size;
66 std::vector<ResourceObserver *> observers;
68 ManagedResource(Resource &);
72 void finish_loading(bool);
73 void finish_loading();
76 void add_observer(ResourceObserver &);
77 void remove_observer(ResourceObserver &);
80 class LoadingThread: public Thread
85 std::deque<ManagedResource *> async_queue;
86 std::deque<ManagedResource *> sync_queue;
89 std::list<resource_load_error> error_queue;
90 Mutex data_size_mutex;
91 std::uint64_t loaded_data_size;
100 ManagedResource *front(std::deque<ManagedResource *> &);
103 void add_resource(ManagedResource &);
104 void remove_resource(ManagedResource &);
106 bool try_remove_resource(ManagedResource &);
109 bool needs_work() const { return size<capacity; }
110 std::uint64_t get_and_reset_loaded_data_size();
115 LoadingPolicy policy = LOAD_ON_DEMAND;
116 bool async_loads = true;
117 mutable Mutex map_mutex;
118 std::map<const Resource *, ManagedResource> resources;
119 std::deque<ManagedResource *> queue;
120 std::uint64_t total_data_size = 0;
121 std::uint64_t size_limit = 0;
123 unsigned min_retain_frames = 30;
124 unsigned max_retain_frames = 0;
125 unsigned next_unload = 0;
126 LoadingThread thread;
131 void set_loading_policy(LoadingPolicy);
132 void set_async_loads(bool);
133 void set_size_limit(std::uint64_t);
134 void set_min_retain_frames(unsigned);
135 void set_max_retain_frames(unsigned);
137 void add_resource(Resource &);
139 const ManagedResource &get_managed_resource(const Resource &) const;
140 ManagedResource &get_managed_resource(const Resource &);
142 void *get_data_for_resource(const Resource &r) { return &get_managed_resource(r); }
143 void set_resource_location(Resource &, DataFile::Collection &, const std::string &);
144 void set_resource_location(Resource &, const ResourceLocation &);
145 const ResourceLocation *get_resource_location(const Resource &) const;
146 void load_resource(Resource &);
147 bool is_resource_loaded(const Resource &) const;
148 void resource_used(const Resource &);
149 void remove_resource(Resource &);
151 void observe_resource(const Resource &, ResourceObserver &);
152 void unobserve_resource(const Resource &, ResourceObserver &);
156 void dispatch_work();
157 void unload_by_age();
158 void unload_by_size();
160 std::uint64_t get_total_data_size() const { return total_data_size; }
163 static bool age_order(ManagedResource *, ManagedResource *);