97 lines
2.7 KiB
C++
97 lines
2.7 KiB
C++
|
|
// BiomeCache.h
|
|
|
|
// Declares the cBiomeCache class representing a biome source that caches data from the underlying biome source
|
|
|
|
/*
|
|
This cache works a bit differently than regular caches.
|
|
It first receives the hint of area that it will need to provide.
|
|
The Cache uses several threads to request biomes from the underlying source to fill that area.
|
|
While the area is being filled, requests for biomes may already come, such requests are answered with baLater if no data yet.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
|
|
|
|
|
|
|
|
#include "BiomeSource.h"
|
|
#include "../source/OSSupport/IsThread.h"
|
|
|
|
|
|
|
|
|
|
|
|
class cBiomeCache :
|
|
public cBiomeSource
|
|
{
|
|
public:
|
|
cBiomeCache(void);
|
|
~cBiomeCache();
|
|
|
|
// cBiomeSource overrides:
|
|
virtual eAvailability GetBiome(int a_ChunkX, int a_ChunkZ, cChunkDef::BiomeMap & a_Biomes) override;
|
|
virtual void HintViewArea(int a_MinChunkX, int a_MaxChunkX, int a_MinChunkZ, int a_MaxChunkZ) override;
|
|
|
|
void SetSource(cBiomeSource * a_Source); // Takes ownership of the source ptr
|
|
|
|
protected:
|
|
class cItem
|
|
{
|
|
public:
|
|
cItem(int a_ChunkX, int a_ChunkZ);
|
|
|
|
int m_ChunkX;
|
|
int m_ChunkZ;
|
|
bool m_IsValid;
|
|
cChunkDef::BiomeMap m_Biomes;
|
|
} ;
|
|
|
|
typedef cItem * pItem;
|
|
typedef std::list<pItem> cItems;
|
|
|
|
class cThread :
|
|
public cIsThread
|
|
{
|
|
typedef cIsThread super;
|
|
|
|
public:
|
|
cThread(cBiomeCache & a_Parent);
|
|
|
|
// cIsThread overrides:
|
|
virtual void Execute(void) override;
|
|
|
|
protected:
|
|
cBiomeCache & m_Parent;
|
|
} ;
|
|
|
|
typedef std::list<cThread *> cThreads;
|
|
|
|
cBiomeSource * m_Source;
|
|
|
|
cCriticalSection m_CS;
|
|
int m_BaseX; ///< MinChunkX for the m_Available rectangle
|
|
int m_BaseZ; ///< MinChunkZ for the m_Available rectangle
|
|
int m_Width; ///< Width of the m_Available rectangle
|
|
int m_Height; ///< Height of the m_Available rectangle
|
|
pItem * m_Available; ///< Items that have already been processed (baNow or baNever), [x + m_Width * z]
|
|
cItems m_Queue; ///< Items that are queued for processing (baLater)
|
|
cItems m_Pool; ///< Items that are not needed anymore, can be reused for other coords
|
|
|
|
cEvent m_evtQueued; // Triggerred when an item is added to m_Queue
|
|
|
|
cThreads m_Threads; // Threads that update the cache.
|
|
bool m_IsTerminatingThreads; // Set to true to indicate to all threads that they should exit
|
|
|
|
/// Removes from a_Items all items that are outside of the given coords, moves those into m_Pool
|
|
void FilterOutItems(cItems & a_Items, int a_MinChunkX, int a_MaxChunkX, int a_MinChunkZ, int a_MaxChunkZ);
|
|
|
|
/// Processes one item from m_Queue into m_Available. Blocks if m_Queue is empty; respects m_IsTerminatingThreads
|
|
void thrProcessQueueItem(void);
|
|
} ;
|
|
|
|
|
|
|
|
|