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| author | madmaxoft@gmail.com <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6> | 2013-07-06 21:43:13 +0200 |
|---|---|---|
| committer | madmaxoft@gmail.com <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6> | 2013-07-06 21:43:13 +0200 |
| commit | 209ad8702634e72d8cb528d3df181e2300a31115 (patch) | |
| tree | dd80891eda325a8f21ff9e751d333699e9a9c779 /Tools/BiomeVisualiser/BiomeCache.h | |
| parent | Added missing "Colors", Documented the code + Cleanup. (diff) | |
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Diffstat (limited to 'Tools/BiomeVisualiser/BiomeCache.h')
| -rw-r--r-- | Tools/BiomeVisualiser/BiomeCache.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/Tools/BiomeVisualiser/BiomeCache.h b/Tools/BiomeVisualiser/BiomeCache.h new file mode 100644 index 000000000..86602a19d --- /dev/null +++ b/Tools/BiomeVisualiser/BiomeCache.h @@ -0,0 +1,96 @@ +
+// 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);
+} ;
+
+
+
+
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