From 4f17362aeb80e5339c58a5d3b0fbaeb88d9e701c Mon Sep 17 00:00:00 2001
From: "madmaxoft@gmail.com"
 <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>
Date: Mon, 13 Feb 2012 21:47:03 +0000
Subject: Rewritten most of the code for multithreading; still not 100%, but
 getting there. If this commit proves to be too problematic, we can always
 undo it.

git-svn-id: http://mc-server.googlecode.com/svn/trunk@251 0a769ca7-a7f5-676a-18bf-c427514a06d6
---
 source/WSSCompact.h | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 source/WSSCompact.h

(limited to 'source/WSSCompact.h')

diff --git a/source/WSSCompact.h b/source/WSSCompact.h
new file mode 100644
index 000000000..dc5ecfe9e
--- /dev/null
+++ b/source/WSSCompact.h
@@ -0,0 +1,84 @@
+
+// WSSCompact.h
+
+// Interfaces to the cWSSCompact class representing the "Compact" storage schema (PAK-files)
+
+
+
+
+
+#pragma once
+#ifndef WSSCOMPACT_H_INCLUDED
+#define WSSCOMPACT_H_INCLUDED
+
+#include "WorldStorage.h"
+
+
+
+
+
+class cWSSCompact :
+	public cWSSchema
+{
+public:
+	cWSSCompact(cWorld * a_World) : cWSSchema(a_World) {}
+	virtual ~cWSSCompact();
+	
+protected:
+
+	struct sChunkHeader;
+	typedef std::vector<sChunkHeader *> sChunkHeaders;
+	
+	/// Implements a cache for a single PAK file; implements lazy-write in order to be able to write multiple chunks fast
+	class cPAKFile
+	{
+	public:
+	
+		cPAKFile(const AString & a_FileName, int a_LayerX, int a_LayerZ);
+		~cPAKFile();
+
+		bool SaveChunk(const cChunkPtr & a_Chunk);
+		bool LoadChunk(const cChunkPtr & a_Chunk);
+		
+		int GetLayerX(void) const {return m_LayerX; }
+		int GetLayerZ(void) const {return m_LayerZ; }
+		
+	protected:
+	
+		AString m_FileName;
+		int     m_LayerX;
+		int     m_LayerZ;
+		
+		sChunkHeaders m_ChunkHeaders;
+		AString       m_DataContents;  // Data contents of the file, cached
+		
+		int           m_NumDirty;  // Number of chunks that were written into m_DataContents but not into the file
+		
+		bool LoadChunk(const cChunkPtr & a_Chunk, int a_Offset, sChunkHeader * a_Header);
+		void EraseChunk(const cChunkPtr & a_Chunk);  // Erases the chunk data from m_DataContents and updates m_ChunkHeaders
+		bool SaveChunkToData(const cChunkPtr & a_Chunk);  // Saves the chunk to m_DataContents, updates headers and m_NumDirty
+		void SynchronizeFile(void);  // Writes m_DataContents along with the headers to file, resets m_NumDirty
+	} ;
+	
+	typedef std::list<cPAKFile *> cPAKFiles;
+	
+	cPAKFiles m_PAKFiles;  // A MRU cache of PAK files
+	
+	/// Loads the correct PAK file either from cache or from disk, manages the m_PAKFiles cache
+	cPAKFile * LoadPAKFile(const cChunkPtr & a_Chunk);
+	
+	// cWSSchema overrides:
+	virtual bool LoadChunk(const cChunkPtr & a_Chunk) override;
+	virtual bool SaveChunk(const cChunkPtr & a_Chunk) override;
+	virtual const AString GetName(void) const override {return "compact"; }
+} ;
+
+
+
+
+
+#endif  // WSSCOMPACT_H_INCLUDED
+
+
+
+
-- 
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