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#pragma once
#include "tile.hpp"
#include "tiler.hpp"
#include "../graphics/resource_manager.hpp"
#include "../base/mru_cache.hpp"
#include "../base/mutex.hpp"
#include "../std/bind.hpp"
class ResourceManager;
class TileCache
{
public:
struct Entry
{
Tile m_tile;
shared_ptr<graphics::ResourceManager> m_rm;
Entry();
Entry(Tile const & tile, shared_ptr<graphics::ResourceManager> const & rm);
};
struct EntryValueTraits
{
static void Evict(Entry & val);
};
private:
my::MRUCache<Tiler::RectInfo, Entry, EntryValueTraits> m_cache;
threads::Mutex m_lock;
TileCache(TileCache const & src);
TileCache const & operator=(TileCache const & src);
public:
TileCache();
/// lock for multithreaded access
void Lock();
/// unlock for multithreaded access
void Unlock();
/// get keys of values in cache
set<Tiler::RectInfo> const & Keys() const;
/// add tile to cache
void AddTile(Tiler::RectInfo const & key, Entry const & entry);
/// check, whether we have some tile in the cache
bool HasTile(Tiler::RectInfo const & key);
/// lock tile
void LockTile(Tiler::RectInfo const & key);
/// unlock tile
void UnlockTile(Tiler::RectInfo const & key);
/// lock count
size_t LockCount(Tiler::RectInfo const & key);
/// touch tile
void TouchTile(Tiler::RectInfo const & key);
/// get tile from the cache
Tile const & GetTile(Tiler::RectInfo const & key);
/// remove the specified tile from the cache
void Remove(Tiler::RectInfo const & key);
/// how much elements can fit in the tileCache
int CanFit() const;
/// how many unlocked elements do we have in tileCache
int UnlockedWeight() const;
/// how many locked elements do we have in tileCache
int LockedWeight() const;
/// the size of the cache
int CacheSize() const;
/// resize the cache
void Resize(int maxWeight);
/// free up to weight spaces evicting unlocked elements from cache
void FreeRoom(int weight);
};
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