11 files changed, 349 insertions, 118 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index b8780e8a6..29337cb2e 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -56,6 +56,7 @@ SET (SRCS
 	Root.cpp
 	Scoreboard.cpp
 	Server.cpp
+	SetChunkData.cpp
 	Statistics.cpp
 	StringCompression.cpp
 	StringUtils.cpp
@@ -124,6 +125,7 @@ SET (HDRS
 	Root.h
 	Scoreboard.h
 	Server.h
+	SetChunkData.h
 	StackWalker.h
 	Statistics.h
 	StringCompression.h
diff --git a/src/Chunk.cpp b/src/Chunk.cpp
index 60987b070..10bc2ff23 100644
--- a/src/Chunk.cpp
+++ b/src/Chunk.cpp
@@ -34,6 +34,7 @@
 #include "MobCensus.h"
 #include "MobSpawner.h"
 #include "BlockInServerPluginInterface.h"
+#include "SetChunkData.h"
 
 #include "json/json.h"
 
@@ -265,41 +266,34 @@ void cChunk::GetAllData(cChunkDataCallback & a_Callback)
 
 
 
-void cChunk::SetAllData(
-	const BLOCKTYPE *  a_BlockTypes,
-	const NIBBLETYPE * a_BlockMeta,
-	const NIBBLETYPE * a_BlockLight,
-	const NIBBLETYPE * a_BlockSkyLight,
-	const HeightMap *  a_HeightMap,
-	const BiomeMap &   a_BiomeMap,
-	cBlockEntityList & a_BlockEntities
-)
+void cChunk::SetAllData(cSetChunkData & a_SetChunkData)
 {
-	memcpy(m_BiomeMap, a_BiomeMap, sizeof(m_BiomeMap));
+	ASSERT(a_SetChunkData.IsHeightMapValid());
+	ASSERT(a_SetChunkData.AreBiomesValid());
+	
+	memcpy(m_BiomeMap, a_SetChunkData.GetBiomes(), sizeof(m_BiomeMap));
+	memcpy(m_HeightMap, a_SetChunkData.GetHeightMap(), sizeof(m_HeightMap));
 
-	if (a_HeightMap != NULL)
+	m_ChunkData.SetBlockTypes(a_SetChunkData.GetBlockTypes());
+	m_ChunkData.SetMetas(a_SetChunkData.GetBlockMetas());
+	if (a_SetChunkData.IsLightValid())
 	{
-		memcpy(m_HeightMap, a_HeightMap, sizeof(m_HeightMap));
+		m_ChunkData.SetBlockLight(a_SetChunkData.GetBlockLight());
+		m_ChunkData.SetSkyLight(a_SetChunkData.GetSkyLight());
+		m_IsLightValid = true;
 	}
-
-	if (a_HeightMap == NULL)
+	else
 	{
-		CalculateHeightmap(a_BlockTypes);
+		m_IsLightValid = false;
 	}
 
-	m_ChunkData.SetBlockTypes(a_BlockTypes);
-	m_ChunkData.SetMetas(a_BlockMeta);
-	m_ChunkData.SetBlockLight(a_BlockLight);
-	m_ChunkData.SetSkyLight(a_BlockSkyLight);
-	
-	m_IsLightValid = (a_BlockLight != NULL) && (a_BlockSkyLight != NULL);
-
 	// Clear the block entities present - either the loader / saver has better, or we'll create empty ones:
 	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(); itr != m_BlockEntities.end(); ++itr)
 	{
 		delete *itr;
 	}
-	std::swap(a_BlockEntities, m_BlockEntities);
+	m_BlockEntities.clear();
+	std::swap(a_SetChunkData.GetBlockEntities(), m_BlockEntities);
 	
 	// Set all block entities' World variable:
 	for (cBlockEntityList::iterator itr = m_BlockEntities.begin(); itr != m_BlockEntities.end(); ++itr)
diff --git a/src/Chunk.h b/src/Chunk.h
index 9ab39a0a2..5d50f9717 100644
--- a/src/Chunk.h
+++ b/src/Chunk.h
@@ -95,16 +95,10 @@ public:
 	/** Gets all chunk data, calls the a_Callback's methods for each data type */
 	void GetAllData(cChunkDataCallback & a_Callback);
 	
-	/** Sets all chunk data */
-	void SetAllData(
-		const BLOCKTYPE *  a_BlockTypes,
-		const NIBBLETYPE * a_BlockMeta,
-		const NIBBLETYPE * a_BlockLight,
-		const NIBBLETYPE * a_BlockSkyLight,
-		const cChunkDef::HeightMap * a_HeightMap,
-		const cChunkDef::BiomeMap &  a_BiomeMap,
-		cBlockEntityList & a_BlockEntities
-	);
+	/** Sets all chunk data as either loaded from the storage or generated.
+	BlockLight and BlockSkyLight are optional, if not present, chunk will be marked as unlighted.
+	Modifies the BlockEntity list in a_SetChunkData - moves the block entities into the chunk. */
+	void SetAllData(cSetChunkData & a_SetChunkData);
 	
 	void SetLight(
 		const cChunkDef::BlockNibbles & a_BlockLight,
diff --git a/src/ChunkMap.cpp b/src/ChunkMap.cpp
index 3ef981e94..05d219918 100644
--- a/src/ChunkMap.cpp
+++ b/src/ChunkMap.cpp
@@ -16,6 +16,7 @@
 #include "MobCensus.h"
 #include "MobSpawner.h"
 #include "BoundingBox.h"
+#include "SetChunkData.h"
 
 #include "Entities/Pickup.h"
 
@@ -912,28 +913,20 @@ void cChunkMap::MarkChunkSaved (int a_ChunkX, int a_ChunkZ)
 
 
 
-void cChunkMap::SetChunkData(
-	int a_ChunkX, int a_ChunkZ,
-	const BLOCKTYPE *  a_BlockTypes,
-	const NIBBLETYPE * a_BlockMeta,
-	const NIBBLETYPE * a_BlockLight,
-	const NIBBLETYPE * a_BlockSkyLight,
-	const cChunkDef::HeightMap * a_HeightMap,
-	const cChunkDef::BiomeMap &  a_BiomeMap,
-	cBlockEntityList & a_BlockEntities,
-	bool a_MarkDirty
-)
+void cChunkMap::SetChunkData(cSetChunkData & a_SetChunkData)
 {
+	int ChunkX = a_SetChunkData.GetChunkX();
+	int ChunkZ = a_SetChunkData.GetChunkZ();
 	{
 		cCSLock Lock(m_CSLayers);
-		cChunkPtr Chunk = GetChunkNoLoad(a_ChunkX, ZERO_CHUNK_Y, a_ChunkZ);
+		cChunkPtr Chunk = GetChunkNoLoad(ChunkX, ZERO_CHUNK_Y, ChunkZ);
 		if (Chunk == NULL)
 		{
 			return;
 		}
-		Chunk->SetAllData(a_BlockTypes, a_BlockMeta, a_BlockLight, a_BlockSkyLight, a_HeightMap, a_BiomeMap, a_BlockEntities);
+		Chunk->SetAllData(a_SetChunkData);
 		
-		if (a_MarkDirty)
+		if (a_SetChunkData.ShouldMarkDirty())
 		{
 			Chunk->MarkDirty();
 		}
@@ -942,7 +935,7 @@ void cChunkMap::SetChunkData(
 		cChunkStays ToBeDisabled;
 		for (cChunkStays::iterator itr = m_ChunkStays.begin(), end = m_ChunkStays.end(); itr != end; ++itr)
 		{
-			if ((*itr)->ChunkAvailable(a_ChunkX, a_ChunkZ))
+			if ((*itr)->ChunkAvailable(ChunkX, ChunkZ))
 			{
 				// The chunkstay wants to be disabled, add it to a list of to-be-disabled chunkstays for later processing:
 				ToBeDisabled.push_back(*itr);
@@ -957,7 +950,7 @@ void cChunkMap::SetChunkData(
 	}
 
 	// Notify plugins of the chunk becoming available
-	cPluginManager::Get()->CallHookChunkAvailable(m_World, a_ChunkX, a_ChunkZ);
+	cPluginManager::Get()->CallHookChunkAvailable(m_World, ChunkX, ChunkZ);
 }
 
 
diff --git a/src/ChunkMap.h b/src/ChunkMap.h
index 4be1a4752..e33d9f894 100644
--- a/src/ChunkMap.h
+++ b/src/ChunkMap.h
@@ -34,6 +34,7 @@ class cChunkDataSerializer;
 class cBlockArea;
 class cMobCensus;
 class cMobSpawner;
+class cSetChunkData;
 
 typedef std::list<cClientHandle *>         cClientHandleList;
 typedef cChunk *                           cChunkPtr;
@@ -112,22 +113,11 @@ public:
 	void MarkChunkSaved     (int a_ChunkX, int a_ChunkZ);
 	
 	/** Sets the chunk data as either loaded from the storage or generated.
-	a_BlockLight and a_BlockSkyLight are optional, if not present, chunk will be marked as unlighted.
-	a_BiomeMap is optional, if not present, biomes will be calculated by the generator
-	a_HeightMap is optional, if not present, will be calculated.
-	If a_MarkDirty is set, the chunk is set as dirty (used after generating)
+	BlockLight and BlockSkyLight are optional, if not present, chunk will be marked as unlighted.
+	If MarkDirty is set, the chunk is set as dirty (used after generating)
+	Modifies the BlockEntity list in a_SetChunkData - moves the block entities into the chunk.
 	*/
-	void SetChunkData(
-		int a_ChunkX, int a_ChunkZ,
-		const BLOCKTYPE * a_BlockTypes,
-		const NIBBLETYPE * a_BlockMeta,
-		const NIBBLETYPE * a_BlockLight,
-		const NIBBLETYPE * a_BlockSkyLight,
-		const cChunkDef::HeightMap * a_HeightMap,
-		const cChunkDef::BiomeMap &  a_BiomeMap,
-		cBlockEntityList & a_BlockEntities,
-		bool a_MarkDirty
-	);
+	void SetChunkData(cSetChunkData & a_SetChunkData);
 	
 	void ChunkLighted(
 		int a_ChunkX, int a_ChunkZ,
diff --git a/src/SetChunkData.cpp b/src/SetChunkData.cpp
new file mode 100644
index 000000000..6e0c2733e
--- /dev/null
+++ b/src/SetChunkData.cpp
@@ -0,0 +1,115 @@
+
+// SetChunkData.cpp
+
+// Implements the cSetChunkData class used for sending loaded / generated chunk
+
+#include "Globals.h"
+#include "SetChunkData.h"
+
+
+
+
+
+cSetChunkData::cSetChunkData(int a_ChunkX, int a_ChunkZ, bool a_ShouldMarkDirty) :
+	m_ChunkX(a_ChunkX),
+	m_ChunkZ(a_ChunkZ),
+	m_ShouldMarkDirty(a_ShouldMarkDirty)
+{
+}
+
+
+
+
+
+cSetChunkData::cSetChunkData(
+	int a_ChunkX, int a_ChunkZ,
+	const BLOCKTYPE * a_BlockTypes,
+	const NIBBLETYPE * a_BlockMetas,
+	const NIBBLETYPE * a_BlockLight,
+	const NIBBLETYPE * a_SkyLight,
+	const cChunkDef::HeightMap * a_HeightMap,
+	const cChunkDef::BiomeMap * a_Biomes,
+	cEntityList & a_Entities,
+	cBlockEntityList & a_BlockEntities,
+	bool a_ShouldMarkDirty
+) :
+	m_ChunkX(a_ChunkX),
+	m_ChunkZ(a_ChunkZ),
+	m_ShouldMarkDirty(a_ShouldMarkDirty)
+{
+	// Check the params' validity:
+	ASSERT(a_BlockTypes != NULL);
+	ASSERT(a_BlockMetas != NULL);
+	ASSERT(a_Biomes != NULL);
+
+	// Copy block types and metas:
+	memcpy(m_BlockTypes, a_BlockTypes, sizeof(cChunkDef::BlockTypes));
+	memcpy(m_BlockMetas, a_BlockMetas, sizeof(cChunkDef::BlockNibbles));
+	
+	// Copy lights, if both given:
+	if ((a_BlockLight != NULL) && (a_SkyLight != NULL))
+	{
+		memcpy(m_BlockLight, a_BlockLight, sizeof(m_BlockLight));
+		memcpy(m_SkyLight,   a_SkyLight,   sizeof(m_SkyLight));
+		m_IsLightValid = true;
+	}
+	else
+	{
+		m_IsLightValid = false;
+	}
+	
+	// Copy the heightmap, if available:
+	if (a_HeightMap != NULL)
+	{
+		memcpy(m_HeightMap, a_HeightMap, sizeof(m_HeightMap));
+		m_IsHeightMapValid = true;
+	}
+	else
+	{
+		m_IsHeightMapValid = false;
+	}
+	
+	// Copy biomes, if available:
+	if (a_Biomes != NULL)
+	{
+		memcpy(m_Biomes, a_Biomes, sizeof(m_Biomes));
+		m_AreBiomesValid = true;
+	}
+	else
+	{
+		m_AreBiomesValid = false;
+	}
+	
+	// Move entities and blockentities:
+	std::swap(m_Entities,      a_Entities);
+	std::swap(m_BlockEntities, a_BlockEntities);
+}
+
+
+
+
+
+void cSetChunkData::CalculateHeightMap(void)
+{
+	for (int x = 0; x < cChunkDef::Width; x++)
+	{
+		for (int z = 0; z < cChunkDef::Width; z++)
+		{
+			for (int y = cChunkDef::Height - 1; y > -1; y--)
+			{
+				int index = cChunkDef::MakeIndexNoCheck(x, y, z);
+				if (m_BlockTypes[index] != E_BLOCK_AIR)
+				{
+					m_HeightMap[x + z * cChunkDef::Width] = (HEIGHTTYPE)y;
+					break;
+				}
+			}  // for y
+		}  // for z
+	}  // for x
+	m_IsHeightMapValid = true;
+}
+
+
+
+
+
diff --git a/src/SetChunkData.h b/src/SetChunkData.h
new file mode 100644
index 000000000..a2f776f6b
--- /dev/null
+++ b/src/SetChunkData.h
@@ -0,0 +1,120 @@
+
+// SetChunkData.h
+
+// Declares the cSetChunkData class used for sending loaded / generated chunk data into cWorld
+
+
+
+
+
+#pragma once
+
+
+
+
+
+class cSetChunkData
+{
+public:
+	/** Constructs a new instance with empty data.
+	Allocates new buffers for the block data.
+	Prefer to use this constructor, then fill the object with data and then send it to cWorld, as this will
+	reduce the copying required to queue the set operation. */
+	cSetChunkData(int a_ChunkX, int a_ChunkZ, bool a_ShouldMarkDirty);
+
+	/** Constructs a new instance based on data existing elsewhere, will copy all the memory. Prefer to use the
+	other constructor as much as possible.
+	Will move the entity and blockentity lists into the internal storage, and empty the a_Entities and
+	a_BlockEntities lists.
+	a_BlockTypes and a_BlockMetas must always be valid.
+	If either of the light arrays are NULL, the chunk data will be marked as not having any light at all and
+	will be scheduled for re-lighting once it is set into the chunkmap.
+	If a_Biomes is not valid, the internal flag is set and the world will calculate the biomes using the chunk
+	generator when setting the chunk data.
+	If a_HeightMap is not assigned, the world will calculate the heightmap based on the blocktypes when setting
+	the chunk data. */
+	cSetChunkData(
+		int a_ChunkX, int a_ChunkZ,
+		const BLOCKTYPE * a_BlockTypes,
+		const NIBBLETYPE * a_BlockMetas,
+		const NIBBLETYPE * a_BlockLight,
+		const NIBBLETYPE * a_SkyLight,
+		const cChunkDef::HeightMap * a_HeightMap,
+		const cChunkDef::BiomeMap * a_Biomes,
+		cEntityList & a_Entities,
+		cBlockEntityList & a_BlockEntities,
+		bool a_ShouldMarkDirty
+	);
+	
+	int GetChunkX(void) const { return m_ChunkX; }
+	int GetChunkZ(void) const { return m_ChunkZ; }
+	
+	/** Returns the internal storage of the block types, read-only. */
+	const cChunkDef::BlockTypes & GetBlockTypes(void) const { return m_BlockTypes; }
+	
+	/** Returns the internal storage of the block types, read-only. */
+	const cChunkDef::BlockNibbles & GetBlockMetas(void) const { return m_BlockMetas; }
+	
+	/** Returns the internal storage of the block light, read-only. */
+	const cChunkDef::BlockNibbles & GetBlockLight(void) const { return m_BlockLight; }
+	
+	/** Returns the internal storage of the block types, read-only. */
+	const cChunkDef::BlockNibbles & GetSkyLight(void) const { return m_SkyLight; }
+	
+	/** Returns the internal storage for heightmap, read-only. */
+	const cChunkDef::HeightMap & GetHeightMap(void) const { return m_HeightMap; }
+	
+	/** Returns the internal storage for biomes, read-write. */
+	cChunkDef::BiomeMap & GetBiomes(void) { return m_Biomes; }
+	
+	/** Returns the internal storage for entities, read-write. */
+	cEntityList & GetEntities(void) { return m_Entities; }
+	
+	/** Returns the internal storage for block entities, read-write. */
+	cBlockEntityList & GetBlockEntities(void) { return m_BlockEntities; }
+	
+	/** Returns whether both light arrays stored in this object are valid. */
+	bool IsLightValid(void) const { return m_IsLightValid; }
+	
+	/** Returns whether the heightmap stored in this object is valid. */
+	bool IsHeightMapValid(void) const { return m_IsHeightMapValid; }
+
+	/** Returns whether the biomes stored in this object are valid. */
+	bool AreBiomesValid(void) const { return m_AreBiomesValid; }
+	
+	/** Returns whether the chunk should be marked as dirty after its data is set.
+	Used by the generator to save chunks after generating. */
+	bool ShouldMarkDirty(void) const { return m_ShouldMarkDirty; }
+	
+	/** Marks the biomes stored in this object as valid. */
+	void MarkBiomesValid(void) { m_AreBiomesValid = true; }
+	
+	/** Calculates the heightmap based on the contained blocktypes and marks it valid. */
+	void CalculateHeightMap(void);
+
+protected:
+	int m_ChunkX;
+	int m_ChunkZ;
+	
+	cChunkDef::BlockTypes m_BlockTypes;
+	cChunkDef::BlockNibbles m_BlockMetas;
+	cChunkDef::BlockNibbles m_BlockLight;
+	cChunkDef::BlockNibbles m_SkyLight;
+	cChunkDef::HeightMap m_HeightMap;
+	cChunkDef::BiomeMap m_Biomes;
+	cEntityList m_Entities;
+	cBlockEntityList m_BlockEntities;
+	
+	bool m_IsLightValid;
+	bool m_IsHeightMapValid;
+	bool m_AreBiomesValid;
+	bool m_ShouldMarkDirty;
+};
+
+typedef SharedPtr<cSetChunkData> cSetChunkDataPtr;  // TODO: Change to unique_ptr once we go C++11
+typedef std::vector<cSetChunkDataPtr> cSetChunkDataPtrs;
+
+
+
+
+
diff --git a/src/World.cpp b/src/World.cpp
index 104805209..7ad350e24 100644
--- a/src/World.cpp
+++ b/src/World.cpp
@@ -11,6 +11,7 @@
 #include "ChunkMap.h"
 #include "Generating/ChunkDesc.h"
 #include "OSSupport/Timer.h"
+#include "SetChunkData.h"
 
 // Serializers
 #include "WorldStorage/ScoreboardSerializer.h"
@@ -719,6 +720,17 @@ void cWorld::Tick(float a_Dt, int a_LastTickDurationMSec)
 	// Call the plugins
 	cPluginManager::Get()->CallHookWorldTick(*this, a_Dt, a_LastTickDurationMSec);
 	
+	// Set any chunk data that has been queued for setting:
+	cSetChunkDataPtrs SetChunkDataQueue;
+	{
+		cCSLock Lock(m_CSSetChunkDataQueue);
+		std::swap(SetChunkDataQueue, m_SetChunkDataQueue);
+	}
+	for (cSetChunkDataPtrs::iterator itr = SetChunkDataQueue.begin(), end = SetChunkDataQueue.end(); itr != end; ++itr)
+	{
+		SetChunkData(**itr);
+	}  // for itr - SetChunkDataQueue[]
+	
 	// We need sub-tick precision here, that's why we store the time in seconds and calculate ticks off of it
 	m_WorldAgeSecs  += (double)a_Dt / 1000.0;
 	m_TimeOfDaySecs += (double)a_Dt / 1000.0;
@@ -2217,47 +2229,59 @@ void cWorld::MarkChunkSaved (int a_ChunkX, int a_ChunkZ)
 
 
 
-void cWorld::SetChunkData(
-	int a_ChunkX, int a_ChunkZ,
-	const BLOCKTYPE * a_BlockTypes,
-	const NIBBLETYPE * a_BlockMeta,
-	const NIBBLETYPE * a_BlockLight,
-	const NIBBLETYPE * a_BlockSkyLight,
-	const cChunkDef::HeightMap * a_HeightMap,
-	const cChunkDef::BiomeMap  * a_BiomeMap,
-	cEntityList & a_Entities,
-	cBlockEntityList & a_BlockEntities,
-	bool a_MarkDirty
-)
+void cWorld::QueueSetChunkData(const cSetChunkDataPtr & a_SetChunkData)
 {
 	// Validate biomes, if needed:
-	cChunkDef::BiomeMap BiomeMap;
-	const cChunkDef::BiomeMap * Biomes = a_BiomeMap;
-	if (a_BiomeMap == NULL)
+	if (!a_SetChunkData->AreBiomesValid())
 	{
 		// The biomes are not assigned, get them from the generator:
-		Biomes = &BiomeMap;
-		m_Generator.GenerateBiomes(a_ChunkX, a_ChunkZ, BiomeMap);
+		m_Generator.GenerateBiomes(a_SetChunkData->GetChunkX(), a_SetChunkData->GetChunkZ(), a_SetChunkData->GetBiomes());
+		a_SetChunkData->MarkBiomesValid();
 	}
 	
-	m_ChunkMap->SetChunkData(
-		a_ChunkX, a_ChunkZ,
-		a_BlockTypes, a_BlockMeta, a_BlockLight, a_BlockSkyLight,
-		a_HeightMap, *Biomes,
-		a_BlockEntities,
-		a_MarkDirty
-	);
+	// Validate heightmap, if needed:
+	if (!a_SetChunkData->IsHeightMapValid())
+	{
+		a_SetChunkData->CalculateHeightMap();
+	}
+	
+	// Store a copy of the data in the queue:
+	// TODO: If the queue is too large, wait for it to get processed. Not likely, though.
+	cCSLock Lock(m_CSSetChunkDataQueue);
+	m_SetChunkDataQueue.push_back(a_SetChunkData);
+}
+
+
+
+
+
+void cWorld::SetChunkData(cSetChunkData & a_SetChunkData)
+{
+	ASSERT(a_SetChunkData.AreBiomesValid());
+	ASSERT(a_SetChunkData.IsHeightMapValid());
+	
+	m_ChunkMap->SetChunkData(a_SetChunkData);
 	
 	// Initialize the entities (outside the m_ChunkMap's CS, to fix FS #347):
-	for (cEntityList::iterator itr = a_Entities.begin(), end = a_Entities.end(); itr != end; ++itr)
+	cEntityList Entities;
+	std::swap(a_SetChunkData.GetEntities(), Entities);
+	for (cEntityList::iterator itr = Entities.begin(), end = Entities.end(); itr != end; ++itr)
 	{
 		(*itr)->Initialize(*this);
 	}
 	
 	// If a client is requesting this chunk, send it to them:
-	if (m_ChunkMap->HasChunkAnyClients(a_ChunkX, a_ChunkZ))
+	int ChunkX = a_SetChunkData.GetChunkX();
+	int ChunkZ = a_SetChunkData.GetChunkZ();
+	if (m_ChunkMap->HasChunkAnyClients(ChunkX, ChunkZ))
+	{
+		m_ChunkSender.ChunkReady(ChunkX, ChunkZ);
+	}
+
+	// Save the chunk right after generating, so that we don't have to generate it again on next run
+	if (a_SetChunkData.ShouldMarkDirty())
 	{
-		m_ChunkSender.ChunkReady(a_ChunkX, a_ChunkZ);
+		m_Storage.QueueSaveChunk(ChunkX, 0, ChunkZ);
 	}
 }
 
@@ -3295,17 +3319,14 @@ void cWorld::cChunkGeneratorCallbacks::OnChunkGenerated(cChunkDesc & a_ChunkDesc
 	cChunkDef::BlockNibbles BlockMetas;
 	a_ChunkDesc.CompressBlockMetas(BlockMetas);
 
-	m_World->SetChunkData(
+	m_World->QueueSetChunkData(cSetChunkDataPtr(new cSetChunkData(
 		a_ChunkDesc.GetChunkX(), a_ChunkDesc.GetChunkZ(),
 		a_ChunkDesc.GetBlockTypes(), BlockMetas,
 		NULL, NULL,  // We don't have lighting, chunk will be lighted when needed
 		&a_ChunkDesc.GetHeightMap(), &a_ChunkDesc.GetBiomeMap(),
 		a_ChunkDesc.GetEntities(), a_ChunkDesc.GetBlockEntities(),
 		true
-	);
-
-	// Save the chunk right after generating, so that we don't have to generate it again on next run
-	m_World->GetStorage().QueueSaveChunk(a_ChunkDesc.GetChunkX(), 0, a_ChunkDesc.GetChunkZ());
+	)));
 }
 
 
diff --git a/src/World.h b/src/World.h
index 2346ac523..6613b495a 100644
--- a/src/World.h
+++ b/src/World.h
@@ -49,9 +49,14 @@ class cNoteEntity;
 class cMobHeadEntity;
 class cCompositeChat;
 class cCuboid;
+class cSetChunkData;
+
 
 typedef std::list< cPlayer * > cPlayerList;
 
+typedef SharedPtr<cSetChunkData> cSetChunkDataPtr;  // TODO: Change to unique_ptr once we go C++11
+typedef std::vector<cSetChunkDataPtr> cSetChunkDataPtrs;
+
 typedef cItemCallback<cPlayer>             cPlayerListCallback;
 typedef cItemCallback<cEntity>             cEntityCallback;
 typedef cItemCallback<cChestEntity>        cChestCallback;
@@ -246,24 +251,9 @@ public:
 	void MarkChunkSaving(int a_ChunkX, int a_ChunkZ);
 	void MarkChunkSaved (int a_ChunkX, int a_ChunkZ);
 	
-	/** Sets the chunk data as either loaded from the storage or generated.
-	a_BlockLight and a_BlockSkyLight are optional, if not present, chunk will be marked as unlighted.
-	a_BiomeMap is optional, if not present, biomes will be calculated by the generator
-	a_HeightMap is optional, if not present, will be calculated.
-	If a_MarkDirty is set, the chunk is set as dirty (used after generating)
-	*/
-	void SetChunkData(
-		int a_ChunkX, int a_ChunkZ,
-		const BLOCKTYPE *  a_BlockTypes,
-		const NIBBLETYPE * a_BlockMeta,
-		const NIBBLETYPE * a_BlockLight,
-		const NIBBLETYPE * a_BlockSkyLight,
-		const cChunkDef::HeightMap * a_HeightMap,
-		const cChunkDef::BiomeMap  * a_BiomeMap,
-		cEntityList & a_Entities,
-		cBlockEntityList & a_BlockEntities,
-		bool a_MarkDirty
-	);
+	/** Puts the chunk data into a queue to be set into the chunkmap in the tick thread.
+	If the chunk data doesn't contain valid biomes, the biomes are calculated before adding the data into the queue. */
+	void QueueSetChunkData(const cSetChunkDataPtr & a_SetChunkData);
 	
 	void ChunkLighted(
 		int a_ChunkX, int a_ChunkZ,
@@ -969,6 +959,12 @@ private:
 
 	/** List of players that are scheduled for adding, waiting for the Tick thread to add them. */
 	cPlayerList m_PlayersToAdd;
+	
+	/** CS protecting m_SetChunkDataQueue. */
+	cCriticalSection m_CSSetChunkDataQueue;
+	
+	/** Queue for the chunk data to be set into m_ChunkMap by the tick thread. Protected by m_CSSetChunkDataQueue */
+	cSetChunkDataPtrs m_SetChunkDataQueue;
 
 
 	cWorld(const AString & a_WorldName);
@@ -1011,6 +1007,10 @@ private:
 	/** Adds the players queued in the m_PlayersToAdd queue into the m_Players list.
 	Assumes it is called from the Tick thread. */
 	void AddQueuedPlayers(void);
+
+	/** Sets the specified chunk data into the chunkmap. Called in the tick thread.
+	Modifies the a_SetChunkData - moves the entities contained in it into the chunk. */
+	void SetChunkData(cSetChunkData & a_SetChunkData);
 };  // tolua_export
 
 
diff --git a/src/WorldStorage/WSSAnvil.cpp b/src/WorldStorage/WSSAnvil.cpp
index 663d489bc..2851647fe 100644
--- a/src/WorldStorage/WSSAnvil.cpp
+++ b/src/WorldStorage/WSSAnvil.cpp
@@ -14,6 +14,7 @@
 #include "../Item.h"
 #include "../ItemGrid.h"
 #include "../StringCompression.h"
+#include "../SetChunkData.h"
 
 #include "../BlockEntities/ChestEntity.h"
 #include "../BlockEntities/CommandBlockEntity.h"
@@ -391,7 +392,7 @@ bool cWSSAnvil::LoadChunkFromNBT(const cChunkCoords & a_Chunk, const cParsedNBT
 	}  // for y
 	//*/
 	
-	m_World->SetChunkData(
+	m_World->QueueSetChunkData(cSetChunkDataPtr(new cSetChunkData(
 		a_Chunk.m_ChunkX, a_Chunk.m_ChunkZ,
 		BlockTypes, MetaData,
 		IsLightValid ? BlockLight : NULL,
@@ -399,7 +400,7 @@ bool cWSSAnvil::LoadChunkFromNBT(const cChunkCoords & a_Chunk, const cParsedNBT
 		NULL, Biomes,
 		Entities, BlockEntities,
 		false
-	);
+	)));
 	return true;
 }
 
diff --git a/src/WorldStorage/WSSCompact.cpp b/src/WorldStorage/WSSCompact.cpp
index 5382a3e01..ee47047a0 100644
--- a/src/WorldStorage/WSSCompact.cpp
+++ b/src/WorldStorage/WSSCompact.cpp
@@ -18,6 +18,7 @@
 #include "../BlockEntities/MobHeadEntity.h"
 #include "../BlockEntities/NoteEntity.h"
 #include "../BlockEntities/SignEntity.h"
+#include "../SetChunkData.h"
 
 
 
@@ -911,7 +912,7 @@ bool cWSSCompact::LoadChunkFromData(const cChunkCoords & a_Chunk, int a_Uncompre
 	NIBBLETYPE * BlockLight = (NIBBLETYPE *)(BlockData + LightOffset);
 	NIBBLETYPE * SkyLight   = (NIBBLETYPE *)(BlockData + SkyLightOffset);
 	
-	a_World->SetChunkData(
+	a_World->QueueSetChunkData(cSetChunkDataPtr(new cSetChunkData(
 		a_Chunk.m_ChunkX, a_Chunk.m_ChunkZ,
 		BlockData, MetaData,
 		IsLightValid ? BlockLight : NULL,
@@ -919,7 +920,7 @@ bool cWSSCompact::LoadChunkFromData(const cChunkCoords & a_Chunk, int a_Uncompre
 		NULL, NULL,
 		Entities, BlockEntities,
 		false
-	);
+	)));
 
 	return true;
 }