Changed the cWorld::ScheduleTask() signature.

Now it takes the delay in ticks as an argument, and a cTask descendant as the task to run. Lua API has been updated similarly.

MCServer/Plugins/Debuggers/Debuggers.lua

@@ -52,6 +52,7 @@ function Initialize(Plugin)
 	PM:BindCommand("/fill",    "debuggers", HandleFill,            "- Fills all block entities in current chunk with junk");
 	PM:BindCommand("/fr",      "debuggers", HandleFurnaceRecipe,   "- Shows the furnace recipe for the currently held item");
 	PM:BindCommand("/ff",      "debuggers", HandleFurnaceFuel,     "- Shows how long the currently held item would burn in a furnace");
+	PM:BindCommand("/sched",   "debuggers", HandleSched,           "- Schedules a simple countdown using cWorld:ScheduleTask()");
 
 	Plugin:AddWebTab("Debuggers", HandleRequest_Debuggers);
 
@@ -955,6 +956,45 @@ end
 
 
 
+function HandleSched(a_Split, a_Player)
+	local World = a_Player:GetWorld()
+	
+	-- Schedule a broadcast of a countdown message:
+	for i = 1, 10 do
+		World:ScheduleTask(i * 20,
+			function(a_World)
+				a_World:BroadcastChat("Countdown: " .. 11 - i)
+			end
+		)
+	end
+	
+	-- Schedule a broadcast of the final message and a note to the originating player
+	-- Note that we CANNOT us the a_Player in the callback - what if the player disconnected?
+	-- Therefore we store the player's EntityID
+	local PlayerID = a_Player:GetUniqueID()
+	World:ScheduleTask(220,
+		function(a_World)
+			a_World:BroadcastChat("Countdown: BOOM")
+			a_World:DoWithEntityByID(PlayerID,
+				function(a_Entity)
+					if (a_Entity:IsPlayer()) then
+						-- Although unlikely, it is possible that this player is not the originating player
+						-- However, I leave this as an excercise to you to fix this "bug"
+						local Player = tolua.cast(a_Entity, "cPlayer")
+						Player:SendMessage("Countdown finished")
+					end
+				end
+			)
+		end
+	)
+	
+	return true
+end
+
+
+
+
+
 function HandleRequest_Debuggers(a_Request)
 	local FolderContents = cFile:GetFolderContents("./");
 	return "<p>The following objects have been returned by cFile:GetFolderContents():<ul><li>" .. table.concat(FolderContents, "</li><li>") .. "</li></ul></p>";

src/Bindings/ManualBindings.cpp

@@ -986,11 +986,10 @@ static int tolua_cWorld_QueueTask(lua_State * tolua_S)
 
 
 class cLuaScheduledWorldTask :
-	public cWorld::cScheduledTask
+	public cWorld::cTask
 {
 public:
-	cLuaScheduledWorldTask(cPluginLua & a_Plugin, int a_FnRef, int a_Ticks) :
+	cLuaScheduledWorldTask(cPluginLua & a_Plugin, int a_FnRef) :
-		cScheduledTask(a_Ticks),
 		m_Plugin(a_Plugin),
 		m_FnRef(a_FnRef)
 	{
@@ -1025,15 +1024,20 @@ static int tolua_cWorld_ScheduleTask(lua_State * tolua_S)
 	}
 
 	// Retrieve the args:
-	cWorld * self = (cWorld *)tolua_tousertype(tolua_S, 1, 0);
+	cLuaState L(tolua_S);
-	if (self == NULL)
+	if (
+		!L.CheckParamUserType(1, "cWorld") ||
+		!L.CheckParamNumber  (2) ||
+		!L.CheckParamFunction(3)
+	)
+	{
+		return 0;
+	}
+	cWorld * World = (cWorld *)tolua_tousertype(tolua_S, 1, NULL);
+	if (World == NULL)
 	{
 		return lua_do_error(tolua_S, "Error in function call '#funcname#': Not called on an object instance");
 	}
-	if (!lua_isfunction(tolua_S, 2))
-	{
-		return lua_do_error(tolua_S, "Error in function call '#funcname#': Expected a function for parameter #1");
-	}
 
 	// Create a reference to the function:
 	int FnRef = luaL_ref(tolua_S, LUA_REGISTRYINDEX);
@@ -1042,9 +1046,9 @@ static int tolua_cWorld_ScheduleTask(lua_State * tolua_S)
 		return lua_do_error(tolua_S, "Error in function call '#funcname#': Could not get function reference of parameter #1");
 	}
 	
-	int Ticks = (int) tolua_tonumber (tolua_S, 3, 0);
+	int DelayTicks = (int)tolua_tonumber(tolua_S, 2, 0);
 
-	self->ScheduleTask(new cLuaScheduledWorldTask(*Plugin, FnRef, Ticks));
+	World->ScheduleTask(DelayTicks, new cLuaScheduledWorldTask(*Plugin, FnRef));
 	return 0;
 }
 

src/World.cpp

@@ -865,13 +865,17 @@ void cWorld::TickQueuedTasks(void)
 	}  // for itr - m_Tasks[]
 }
 
-void cWorld::TickScheduledTasks()
+
+
+
+
+void cWorld::TickScheduledTasks(void)
 {
-	ScheduledTaskList Tasks;
 	// Make a copy of the tasks to avoid deadlocks on accessing m_Tasks
+	cScheduledTasks Tasks;
 	{
 		cCSLock Lock(m_CSScheduledTasks);
-		while (!m_ScheduledTasks.empty() && m_ScheduledTasks.front()->Ticks < m_WorldAge)
+		while (!m_ScheduledTasks.empty() && (m_ScheduledTasks.front()->m_TargetTick < m_WorldAge))
 		{
 			Tasks.push_back(m_ScheduledTasks.front());
 			m_ScheduledTasks.pop_front();
@@ -879,9 +883,9 @@ void cWorld::TickScheduledTasks()
 	}
 
 	// Execute and delete each task:
-	for (ScheduledTaskList::iterator itr = Tasks.begin(), end = Tasks.end(); itr != end; ++itr)
+	for (cScheduledTasks::iterator itr = Tasks.begin(), end = Tasks.end(); itr != end; ++itr)
 	{
-		(*itr)->Run(*this);
+		(*itr)->m_Task->Run(*this);
 		delete *itr;
 	}  // for itr - m_Tasks[]
 }
@@ -2627,19 +2631,25 @@ void cWorld::QueueTask(cTask * a_Task)
 	m_Tasks.push_back(a_Task);
 }
 
-void cWorld::ScheduleTask(cScheduledTask * a_Task)
+
+
+
+
+void cWorld::ScheduleTask(int a_DelayTicks, cTask * a_Task)
 {
-	a_Task->Ticks = a_Task->Ticks + m_WorldAge;
+	Int64 TargetTick = a_DelayTicks + m_WorldAge;
+	
+	// Insert the task into the list of scheduled tasks, ordered by its target tick
 	cCSLock Lock(m_CSScheduledTasks);
-	for(ScheduledTaskList::iterator itr = m_ScheduledTasks.begin(); itr != m_ScheduledTasks.end(); itr++) 
+	for (cScheduledTasks::iterator itr = m_ScheduledTasks.begin(), end = m_ScheduledTasks.end(); itr != end; ++itr)
 	{
-		if((*itr)->Ticks >= a_Task->Ticks) 
+		if ((*itr)->m_TargetTick >= TargetTick)
 		{
-			m_ScheduledTasks.insert(itr, a_Task);
+			m_ScheduledTasks.insert(itr, new cScheduledTask(TargetTick, a_Task));
 			return;
 		}
 	}
-	m_ScheduledTasks.push_back(a_Task);
+	m_ScheduledTasks.push_back(new cScheduledTask(TargetTick, a_Task));
 }
 
 

src/World.h

@@ -66,7 +66,7 @@ public:
 
 	// tolua_end
 	
-	/// A simple RAII locker for the chunkmap - locks the chunkmap in its constructor, unlocks it in the destructor
+	/** A simple RAII locker for the chunkmap - locks the chunkmap in its constructor, unlocks it in the destructor */
 	class cLock :
 		public cCSLock
 	{
@@ -75,7 +75,8 @@ public:
 		cLock(cWorld & a_World);
 	} ;
 
-	/// A common ancestor for all tasks queued onto the tick thread
+	
+	/** A common ancestor for all tasks queued onto the tick thread */
 	class cTask
 	{
 	public:
@@ -83,18 +84,8 @@ public:
 		virtual void Run(cWorld & a_World) = 0;
 	} ;
 	
-	/// A common ancestor for all scheduled tasks queued onto the tick thread
-	class cScheduledTask
-	{
-	public:
-		cScheduledTask(const int a_Ticks) : Ticks(a_Ticks) {};
-		virtual ~cScheduledTask() {};
-		virtual void Run(cWorld & a_World) = 0;
-		int Ticks;
-	};
-	
 	typedef std::vector<cTask *> cTasks;
-	typedef std::list<cScheduledTask *> ScheduledTaskList;
+
 	
 	class cTaskSaveAllChunks :
 		public cTask
@@ -128,16 +119,16 @@ public:
 		BroadcastTimeUpdate();
 	}
 	
-	/// Returns the current game mode. Partly OBSOLETE, you should use IsGameModeXXX() functions wherever applicable
+	/** Returns the current game mode. Partly OBSOLETE, you should use IsGameModeXXX() functions wherever applicable */
 	eGameMode GetGameMode(void) const { return m_GameMode; }
 
-	/// Returns true if the world is in Creative mode
+	/** Returns true if the world is in Creative mode */
 	bool IsGameModeCreative(void) const { return (m_GameMode == gmCreative); }
 	
-	/// Returns true if the world is in Survival mode
+	/** Returns true if the world is in Survival mode */
 	bool IsGameModeSurvival(void) const { return (m_GameMode == gmSurvival); }
 	
-	/// Returns true if the world is in Adventure mode
+	/** Returns true if the world is in Adventure mode */
 	bool IsGameModeAdventure(void) const { return (m_GameMode == gmAdventure); }
 	
 	bool IsPVPEnabled(void) const { return m_bEnabledPVP; }
@@ -147,12 +138,12 @@ public:
 	
 	eDimension GetDimension(void) const { return m_Dimension; }
 
-	/// Returns the world height at the specified coords; waits for the chunk to get loaded / generated
+	/** Returns the world height at the specified coords; waits for the chunk to get loaded / generated */
 	int GetHeight(int a_BlockX, int a_BlockZ);
 	
 	// tolua_end
 
-	/// Retrieves the world height at the specified coords; returns false if chunk not loaded / generated
+	/** Retrieves the world height at the specified coords; returns false if chunk not loaded / generated */
 	bool TryGetHeight(int a_BlockX, int a_BlockZ, int & a_Height);  // Exported in ManualBindings.cpp
 
 	// Broadcast respective packets to all clients of the chunk where the event is taking place
@@ -187,7 +178,7 @@ public:
 	void BroadcastUseBed             (const cEntity & a_Entity, int a_BlockX, int a_BlockY, int a_BlockZ );
 	void BroadcastWeather            (eWeather a_Weather, const cClientHandle * a_Exclude = NULL);
 	
-	/// If there is a block entity at the specified coords, sends it to the client specified
+	/** If there is a block entity at the specified coords, sends it to the client specified */
 	void SendBlockEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cClientHandle & a_Client);
 	
 	void MarkChunkDirty (int a_ChunkX, int a_ChunkZ);
@@ -221,7 +212,7 @@ public:
 	
 	bool GetChunkData      (int a_ChunkX, int a_ChunkZ, cChunkDataCallback & a_Callback);
 	
-	/// Gets the chunk's blocks, only the block types
+	/** Gets the chunk's blocks, only the block types */
 	bool GetChunkBlockTypes(int a_ChunkX, int a_ChunkZ, BLOCKTYPE * a_BlockTypes);
 	
 	bool IsChunkValid      (int a_ChunkX, int a_ChunkZ) const;
@@ -234,13 +225,13 @@ public:
 	void AddPlayer( cPlayer* a_Player );
 	void RemovePlayer( cPlayer* a_Player );
 
-	/// Calls the callback for each player in the list; returns true if all players processed, false if the callback aborted by returning true
+	/** Calls the callback for each player in the list; returns true if all players processed, false if the callback aborted by returning true */
 	bool ForEachPlayer(cPlayerListCallback & a_Callback);  // >> EXPORTED IN MANUALBINDINGS <<
 
- 	/// Calls the callback for the player of the given name; returns true if the player was found and the callback called, false if player not found. Callback return ignored
+	/** Calls the callback for the player of the given name; returns true if the player was found and the callback called, false if player not found. Callback return ignored */
 	bool DoWithPlayer(const AString & a_PlayerName, cPlayerListCallback & a_Callback);  // >> EXPORTED IN MANUALBINDINGS <<
 
-	/// Finds a player from a partial or complete player name and calls the callback - case-insensitive
+	/** Finds a player from a partial or complete player name and calls the callback - case-insensitive */
 	bool FindAndDoWithPlayer(const AString & a_PlayerNameHint, cPlayerListCallback & a_Callback);	// >> EXPORTED IN MANUALBINDINGS <<
 	
 	// TODO: This interface is dangerous - rewrite to DoWithClosestPlayer(pos, sight, action)
@@ -248,74 +239,74 @@ public:
 	
 	void SendPlayerList(cPlayer * a_DestPlayer);  // Sends playerlist to the player
 
-	/// Adds the entity into its appropriate chunk; takes ownership of the entity ptr
+	/** Adds the entity into its appropriate chunk; takes ownership of the entity ptr */
 	void AddEntity(cEntity * a_Entity);
 	
 	bool HasEntity(int a_UniqueID);
 	
-	/// Removes the entity, the entity ptr ownership is assumed taken by the caller
+	/** Removes the entity, the entity ptr ownership is assumed taken by the caller */
 	void RemoveEntity(cEntity * a_Entity);
 	
-	/// Calls the callback for each entity in the entire world; returns true if all entities processed, false if the callback aborted by returning true
+	/** Calls the callback for each entity in the entire world; returns true if all entities processed, false if the callback aborted by returning true */
 	bool ForEachEntity(cEntityCallback & a_Callback);  // Exported in ManualBindings.cpp
 	
-	/// Calls the callback for each entity in the specified chunk; returns true if all entities processed, false if the callback aborted by returning true
+	/** Calls the callback for each entity in the specified chunk; returns true if all entities processed, false if the callback aborted by returning true */
 	bool ForEachEntityInChunk(int a_ChunkX, int a_ChunkZ, cEntityCallback & a_Callback);  // Exported in ManualBindings.cpp
 
-	/// Calls the callback if the entity with the specified ID is found, with the entity object as the callback param. Returns true if entity found and callback returned false.
+	/** Calls the callback if the entity with the specified ID is found, with the entity object as the callback param. Returns true if entity found and callback returned false. */
 	bool DoWithEntityByID(int a_UniqueID, cEntityCallback & a_Callback);  // Exported in ManualBindings.cpp
 
-	/// Compares clients of two chunks, calls the callback accordingly
+	/** Compares clients of two chunks, calls the callback accordingly */
 	void CompareChunkClients(int a_ChunkX1, int a_ChunkZ1, int a_ChunkX2, int a_ChunkZ2, cClientDiffCallback & a_Callback);
 	
-	/// Adds client to a chunk, if not already present; returns true if added, false if present
+	/** Adds client to a chunk, if not already present; returns true if added, false if present */
 	bool AddChunkClient(int a_ChunkX, int a_ChunkZ, cClientHandle * a_Client);
 	
-	/// Removes client from the chunk specified
+	/** Removes client from the chunk specified */
 	void RemoveChunkClient(int a_ChunkX, int a_ChunkZ, cClientHandle * a_Client);
 	
-	/// Removes the client from all chunks it is present in
+	/** Removes the client from all chunks it is present in */
 	void RemoveClientFromChunks(cClientHandle * a_Client);
 	
-	/// Sends the chunk to the client specified, if the chunk is valid. If not valid, the request is postponed (ChunkSender will send that chunk when it becomes valid+lighted)
+	/** Sends the chunk to the client specified, if the chunk is valid. If not valid, the request is postponed (ChunkSender will send that chunk when it becomes valid+lighted) */
 	void SendChunkTo(int a_ChunkX, int a_ChunkZ, cClientHandle * a_Client);
 	
-	/// Removes client from ChunkSender's queue of chunks to be sent
+	/** Removes client from ChunkSender's queue of chunks to be sent */
 	void RemoveClientFromChunkSender(cClientHandle * a_Client);
 	
-	/// Touches the chunk, causing it to be loaded or generated
+	/** Touches the chunk, causing it to be loaded or generated */
 	void TouchChunk(int a_ChunkX, int a_ChunkY, int a_ChunkZ);
 	
-	/// Loads the chunk, if not already loaded. Doesn't generate. Returns true if chunk valid (even if already loaded before)
+	/** Loads the chunk, if not already loaded. Doesn't generate. Returns true if chunk valid (even if already loaded before) */
 	bool LoadChunk(int a_ChunkX, int a_ChunkY, int a_ChunkZ);
 	
-	/// Loads the chunks specified. Doesn't report failure, other than chunks being !IsValid()
+	/** Loads the chunks specified. Doesn't report failure, other than chunks being !IsValid() */
 	void LoadChunks(const cChunkCoordsList & a_Chunks);
 	
-	/// Marks the chunk as failed-to-load:
+	/** Marks the chunk as failed-to-load: */
 	void ChunkLoadFailed(int a_ChunkX, int a_ChunkY, int a_ChunkZ);
 	
-	/// Sets the sign text, asking plugins for permission first. a_Player is the player who this change belongs to, may be NULL. Returns true if sign text changed. Same as UpdateSign()
+	/** Sets the sign text, asking plugins for permission first. a_Player is the player who this change belongs to, may be NULL. Returns true if sign text changed. Same as UpdateSign() */
 	bool SetSignLines(int a_BlockX, int a_BlockY, int a_BlockZ, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4, cPlayer * a_Player = NULL);  // Exported in ManualBindings.cpp
 	
-	/// Sets the sign text, asking plugins for permission first. a_Player is the player who this change belongs to, may be NULL. Returns true if sign text changed. Same as SetSignLines()
+	/** Sets the sign text, asking plugins for permission first. a_Player is the player who this change belongs to, may be NULL. Returns true if sign text changed. Same as SetSignLines() */
 	bool UpdateSign(int a_X, int a_Y, int a_Z, const AString & a_Line1, const AString & a_Line2, const AString & a_Line3, const AString & a_Line4, cPlayer * a_Player = NULL);	// Exported in ManualBindings.cpp
 
-	/// Marks (a_Stay == true) or unmarks (a_Stay == false) chunks as non-unloadable. To be used only by cChunkStay!
+	/** Marks (a_Stay == true) or unmarks (a_Stay == false) chunks as non-unloadable. To be used only by cChunkStay! */
 	void ChunksStay(const cChunkCoordsList & a_Chunks, bool a_Stay = true);
 	
-	/// Regenerate the given chunk:
+	/** Regenerate the given chunk: */
 	void RegenerateChunk(int a_ChunkX, int a_ChunkZ);													// tolua_export
 	
-	/// Generates the given chunk, if not already generated
+	/** Generates the given chunk, if not already generated */
 	void GenerateChunk(int a_ChunkX, int a_ChunkZ);													// tolua_export
 	
-	/// Queues a chunk for lighting; a_Callback is called after the chunk is lighted
+	/** Queues a chunk for lighting; a_Callback is called after the chunk is lighted */
 	void QueueLightChunk(int a_ChunkX, int a_ChunkZ, cChunkCoordCallback * a_Callback = NULL);
 	
 	bool IsChunkLighted(int a_ChunkX, int a_ChunkZ);
 	
-	/// Calls the callback for each chunk in the coords specified (all cords are inclusive). Returns true if all chunks have been processed successfully
+	/** Calls the callback for each chunk in the coords specified (all cords are inclusive). Returns true if all chunks have been processed successfully */
 	bool ForEachChunkInRect(int a_MinChunkX, int a_MaxChunkX, int a_MinChunkZ, int a_MaxChunkZ, cChunkDataCallback & a_Callback);
 
 	// tolua_begin
@@ -366,30 +357,30 @@ public:
 	
 	// tolua_begin
 
-	/// Spawns item pickups for each item in the list. May compress pickups if too many entities:
+	/** Spawns item pickups for each item in the list. May compress pickups if too many entities: */
 	void SpawnItemPickups(const cItems & a_Pickups, double a_BlockX, double a_BlockY, double a_BlockZ, double a_FlyAwaySpeed = 1.0, bool IsPlayerCreated = false);
 	
-	/// Spawns item pickups for each item in the list. May compress pickups if too many entities. All pickups get the speed specified:
+	/** Spawns item pickups for each item in the list. May compress pickups if too many entities. All pickups get the speed specified: */
 	void SpawnItemPickups(const cItems & a_Pickups, double a_BlockX, double a_BlockY, double a_BlockZ, double a_SpeedX, double a_SpeedY, double a_SpeedZ, bool IsPlayerCreated = false);
 	
-	/// Spawns an falling block entity at the given position. It returns the UniqueID of the spawned falling block.
+	/** Spawns an falling block entity at the given position. It returns the UniqueID of the spawned falling block. */
 	int SpawnFallingBlock(int a_X, int a_Y, int a_Z, BLOCKTYPE BlockType, NIBBLETYPE BlockMeta);
 
-	/// Spawns an minecart at the given coordinates.
+	/** Spawns an minecart at the given coordinates. */
 	int SpawnMinecart(double a_X, double a_Y, double a_Z, int a_MinecartType, const cItem & a_Content = cItem(), int a_BlockHeight = 1);
 
-	/// Spawns an experience orb at the given location with the given reward. It returns the UniqueID of the spawned experience orb.
+	/** Spawns an experience orb at the given location with the given reward. It returns the UniqueID of the spawned experience orb. */
 	int SpawnExperienceOrb(double a_X, double a_Y, double a_Z, int a_Reward);
 
-	/// Spawns a new primed TNT entity at the specified block coords and specified fuse duration. Initial velocity is given based on the relative coefficient provided
+	/** Spawns a new primed TNT entity at the specified block coords and specified fuse duration. Initial velocity is given based on the relative coefficient provided */
 	void SpawnPrimedTNT(double a_X, double a_Y, double a_Z, double a_FuseTimeInSec, double a_InitialVelocityCoeff = 1);
 
 	// tolua_end
 
-	/// Replaces world blocks with a_Blocks, if they are of type a_FilterBlockType
+	/** Replaces world blocks with a_Blocks, if they are of type a_FilterBlockType */
 	void ReplaceBlocks(const sSetBlockVector & a_Blocks, BLOCKTYPE a_FilterBlockType);
 	
-	/// Retrieves block types of the specified blocks. If a chunk is not loaded, doesn't modify the block. Returns true if all blocks were read.
+	/** Retrieves block types of the specified blocks. If a chunk is not loaded, doesn't modify the block. Returns true if all blocks were read. */
 	bool GetBlocks(sSetBlockVector & a_Blocks, bool a_ContinueOnFailure);
 	
 	// tolua_begin
@@ -400,10 +391,10 @@ public:
 	double GetSpawnY(void) const { return m_SpawnY; }
 	double GetSpawnZ(void) const { return m_SpawnZ; }
 
-	/// Wakes up the simulators for the specified block
+	/** Wakes up the simulators for the specified block */
 	void WakeUpSimulators(int a_BlockX, int a_BlockY, int a_BlockZ);
 	
-	/// Wakes up the simulators for the specified area of blocks
+	/** Wakes up the simulators for the specified area of blocks */
 	void WakeUpSimulatorsInArea(int a_MinBlockX, int a_MaxBlockX, int a_MinBlockY, int a_MaxBlockY, int a_MinBlockZ, int a_MaxBlockZ);
 
 	// tolua_end
@@ -414,22 +405,22 @@ public:
 	inline cFluidSimulator * GetLavaSimulator (void) { return m_LavaSimulator; }
 	inline cRedstoneSimulator * GetRedstoneSimulator(void) { return m_RedstoneSimulator; }
 	
-	/// Calls the callback for each block entity in the specified chunk; returns true if all block entities processed, false if the callback aborted by returning true
+	/** Calls the callback for each block entity in the specified chunk; returns true if all block entities processed, false if the callback aborted by returning true */
 	bool ForEachBlockEntityInChunk(int a_ChunkX, int a_ChunkZ, cBlockEntityCallback & a_Callback);  // Exported in ManualBindings.cpp
 	
-	/// Calls the callback for each chest in the specified chunk; returns true if all chests processed, false if the callback aborted by returning true
+	/** Calls the callback for each chest in the specified chunk; returns true if all chests processed, false if the callback aborted by returning true */
 	bool ForEachChestInChunk(int a_ChunkX, int a_ChunkZ, cChestCallback & a_Callback);  // Exported in ManualBindings.cpp
 
-	/// Calls the callback for each dispenser in the specified chunk; returns true if all dispensers processed, false if the callback aborted by returning true
+	/** Calls the callback for each dispenser in the specified chunk; returns true if all dispensers processed, false if the callback aborted by returning true */
 	bool ForEachDispenserInChunk(int a_ChunkX, int a_ChunkZ, cDispenserCallback & a_Callback);
 
-	/// Calls the callback for each dropper in the specified chunk; returns true if all droppers processed, false if the callback aborted by returning true
+	/** Calls the callback for each dropper in the specified chunk; returns true if all droppers processed, false if the callback aborted by returning true */
 	bool ForEachDropperInChunk(int a_ChunkX, int a_ChunkZ, cDropperCallback & a_Callback);
 
-	/// Calls the callback for each dropspenser in the specified chunk; returns true if all dropspensers processed, false if the callback aborted by returning true
+	/** Calls the callback for each dropspenser in the specified chunk; returns true if all dropspensers processed, false if the callback aborted by returning true */
 	bool ForEachDropSpenserInChunk(int a_ChunkX, int a_ChunkZ, cDropSpenserCallback & a_Callback);
 
-	/// Calls the callback for each furnace in the specified chunk; returns true if all furnaces processed, false if the callback aborted by returning true
+	/** Calls the callback for each furnace in the specified chunk; returns true if all furnaces processed, false if the callback aborted by returning true */
 	bool ForEachFurnaceInChunk(int a_ChunkX, int a_ChunkZ, cFurnaceCallback & a_Callback);  // Exported in ManualBindings.cpp
 	
 	/** Does an explosion with the specified strength at the specified coordinate
@@ -447,71 +438,71 @@ public:
 	*/
 	void DoExplosionAt(double a_ExplosionSize, double a_BlockX, double a_BlockY, double a_BlockZ, bool a_CanCauseFire, eExplosionSource a_Source, void * a_SourceData);  // tolua_export
 
-	/// Calls the callback for the block entity at the specified coords; returns false if there's no block entity at those coords, true if found
+	/** Calls the callback for the block entity at the specified coords; returns false if there's no block entity at those coords, true if found */
 	bool DoWithBlockEntityAt(int a_BlockX, int a_BlockY, int a_BlockZ, cBlockEntityCallback & a_Callback);  // Exported in ManualBindings.cpp
 
-	/// Calls the callback for the chest at the specified coords; returns false if there's no chest at those coords, true if found
+	/** Calls the callback for the chest at the specified coords; returns false if there's no chest at those coords, true if found */
 	bool DoWithChestAt(int a_BlockX, int a_BlockY, int a_BlockZ, cChestCallback & a_Callback);  // Exported in ManualBindings.cpp
 
-	/// Calls the callback for the dispenser at the specified coords; returns false if there's no dispenser at those coords or callback returns true, returns true if found
+	/** Calls the callback for the dispenser at the specified coords; returns false if there's no dispenser at those coords or callback returns true, returns true if found */
 	bool DoWithDispenserAt(int a_BlockX, int a_BlockY, int a_BlockZ, cDispenserCallback & a_Callback);  // Exported in ManualBindings.cpp
 
-	/// Calls the callback for the dropper at the specified coords; returns false if there's no dropper at those coords or callback returns true, returns true if found
+	/** Calls the callback for the dropper at the specified coords; returns false if there's no dropper at those coords or callback returns true, returns true if found */
 	bool DoWithDropperAt(int a_BlockX, int a_BlockY, int a_BlockZ, cDropperCallback & a_Callback);  // Exported in ManualBindings.cpp
 
-	/// Calls the callback for the dropspenser at the specified coords; returns false if there's no dropspenser at those coords or callback returns true, returns true if found
+	/** Calls the callback for the dropspenser at the specified coords; returns false if there's no dropspenser at those coords or callback returns true, returns true if found */
 	bool DoWithDropSpenserAt(int a_BlockX, int a_BlockY, int a_BlockZ, cDropSpenserCallback & a_Callback);  // Exported in ManualBindings.cpp
 
-	/// Calls the callback for the furnace at the specified coords; returns false if there's no furnace at those coords or callback returns true, returns true if found
+	/** Calls the callback for the furnace at the specified coords; returns false if there's no furnace at those coords or callback returns true, returns true if found */
 	bool DoWithFurnaceAt(int a_BlockX, int a_BlockY, int a_BlockZ, cFurnaceCallback & a_Callback);  // Exported in ManualBindings.cpp
 
-	/// Calls the callback for the noteblock at the specified coords; returns false if there's no noteblock at those coords or callback returns true, returns true if found
+	/** Calls the callback for the noteblock at the specified coords; returns false if there's no noteblock at those coords or callback returns true, returns true if found */
 	bool DoWithNoteBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cNoteBlockCallback & a_Callback);  // Exported in ManualBindings.cpp
 
-	/// Calls the callback for the command block at the specified coords; returns false if there's no command block at those coords or callback returns true, returns true if found
+	/** Calls the callback for the command block at the specified coords; returns false if there's no command block at those coords or callback returns true, returns true if found */
 	bool DoWithCommandBlockAt(int a_BlockX, int a_BlockY, int a_BlockZ, cCommandBlockCallback & a_Callback);  // Exported in ManualBindings.cpp
 	
-	/// Retrieves the test on the sign at the specified coords; returns false if there's no sign at those coords, true if found
+	/** Retrieves the test on the sign at the specified coords; returns false if there's no sign at those coords, true if found */
 	bool GetSignLines (int a_BlockX, int a_BlockY, int a_BlockZ, AString & a_Line1, AString & a_Line2, AString & a_Line3, AString & a_Line4);  // Exported in ManualBindings.cpp
 	
-	/// a_Player is using block entity at [x, y, z], handle that:
+	/** a_Player is using block entity at [x, y, z], handle that: */
 	void UseBlockEntity(cPlayer * a_Player, int a_BlockX, int a_BlockY, int a_BlockZ) {m_ChunkMap->UseBlockEntity(a_Player, a_BlockX, a_BlockY, a_BlockZ); }  // tolua_export
 	
-	/// Calls the callback for the chunk specified, with ChunkMapCS locked; returns false if the chunk doesn't exist, otherwise returns the same value as the callback
+	/** Calls the callback for the chunk specified, with ChunkMapCS locked; returns false if the chunk doesn't exist, otherwise returns the same value as the callback */
 	bool DoWithChunk(int a_ChunkX, int a_ChunkZ, cChunkCallback & a_Callback);
 
 	void GrowTreeImage(const sSetBlockVector & a_Blocks);
 	
 	// tolua_begin
 
-	/// Grows a tree at the specified coords, either from a sapling there, or based on the biome
+	/** Grows a tree at the specified coords, either from a sapling there, or based on the biome */
 	void GrowTree           (int a_BlockX, int a_BlockY, int a_BlockZ);
 	
-	/// Grows a tree at the specified coords, based on the sapling meta provided
+	/** Grows a tree at the specified coords, based on the sapling meta provided */
 	void GrowTreeFromSapling(int a_BlockX, int a_BlockY, int a_BlockZ, NIBBLETYPE a_SaplingMeta);
 	
-	/// Grows a tree at the specified coords, based on the biome in the place
+	/** Grows a tree at the specified coords, based on the biome in the place */
 	void GrowTreeByBiome    (int a_BlockX, int a_BlockY, int a_BlockZ);
 	
-	/// Grows the plant at the specified block to its ripe stage (bonemeal used); returns false if the block is not growable. If a_IsBonemeal is true, block is not grown if not allowed in world.ini
+	/** Grows the plant at the specified block to its ripe stage (bonemeal used); returns false if the block is not growable. If a_IsBonemeal is true, block is not grown if not allowed in world.ini */
 	bool GrowRipePlant(int a_BlockX, int a_BlockY, int a_BlockZ, bool a_IsByBonemeal = false);
 	
-	/// Grows a cactus present at the block specified by the amount of blocks specified, up to the max height specified in the config
+	/** Grows a cactus present at the block specified by the amount of blocks specified, up to the max height specified in the config */
 	void GrowCactus(int a_BlockX, int a_BlockY, int a_BlockZ, int a_NumBlocksToGrow);
 
-	/// Grows a melon or a pumpkin next to the block specified (assumed to be the stem)
+	/** Grows a melon or a pumpkin next to the block specified (assumed to be the stem) */
 	void GrowMelonPumpkin(int a_BlockX, int a_BlockY, int a_BlockZ, BLOCKTYPE a_BlockType);
 
-	/// Grows a sugarcane present at the block specified by the amount of blocks specified, up to the max height specified in the config
+	/** Grows a sugarcane present at the block specified by the amount of blocks specified, up to the max height specified in the config */
 	void GrowSugarcane(int a_BlockX, int a_BlockY, int a_BlockZ, int a_NumBlocksToGrow);
 	
-	/// Returns the biome at the specified coords. Reads the biome from the chunk, if loaded, otherwise uses the world generator to provide the biome value
+	/** Returns the biome at the specified coords. Reads the biome from the chunk, if loaded, otherwise uses the world generator to provide the biome value */
 	int GetBiomeAt(int a_BlockX, int a_BlockZ);
 
-	/// Returns the name of the world
+	/** Returns the name of the world */
 	const AString & GetName(void) const { return m_WorldName; }
 	
-	/// Returns the name of the world.ini file used by this world
+	/** Returns the name of the world.ini file used by this world */
 	const AString & GetIniFileName(void) const {return m_IniFileName; }
 	
 	// tolua_end
@@ -543,22 +534,23 @@ public:
 		if(a_Z < 0 && a_Z % cChunkDef::Width != 0) a_ChunkZ--;
 	}
 
-	/// Saves all chunks immediately. Dangerous interface, may deadlock, use QueueSaveAllChunks() instead
+	/** Saves all chunks immediately. Dangerous interface, may deadlock, use QueueSaveAllChunks() instead */
 	void SaveAllChunks(void);
 	
-	/// Queues a task to save all chunks onto the tick thread. The prefferred way of saving chunks from external sources
+	/** Queues a task to save all chunks onto the tick thread. The prefferred way of saving chunks from external sources */
 	void QueueSaveAllChunks(void);  // tolua_export
 	
-	/// Queues a task onto the tick thread. The task object will be deleted once the task is finished
+	/** Queues a task onto the tick thread. The task object will be deleted once the task is finished */
 	void QueueTask(cTask * a_Task);  // Exported in ManualBindings.cpp
 	
-	// Queues a task onto the tick thread. The task object will be deleted once the task is finished
+	/** Queues a task onto the tick thread, with the specified delay.
-	void ScheduleTask(cScheduledTask * a_Task);
+	The task object will be deleted once the task is finished */
+	void ScheduleTask(int a_DelayTicks, cTask * a_Task);
 
-	/// Returns the number of chunks loaded	
+	/** Returns the number of chunks loaded	 */
 	int GetNumChunks() const;  // tolua_export
 
-	/// Returns the number of chunks loaded and dirty, and in the lighting queue
+	/** Returns the number of chunks loaded and dirty, and in the lighting queue */
 	void GetChunkStats(int & a_NumValid, int & a_NumDirty, int & a_NumInLightingQueue);
 
 	// Various queues length queries (cannot be const, they lock their CS):
@@ -569,13 +561,13 @@ public:
 
 	void InitializeSpawn(void);
 	
-	/// Starts threads that belong to this world
+	/** Starts threads that belong to this world */
 	void Start(void);
 	
-	/// Stops threads that belong to this world (part of deinit)
+	/** Stops threads that belong to this world (part of deinit) */
 	void Stop(void);
 	
-	/// Processes the blocks queued for ticking with a delay (m_BlockTickQueue[])
+	/** Processes the blocks queued for ticking with a delay (m_BlockTickQueue[]) */
 	void TickQueuedBlocks(void);
 
 	struct BlockTickQueueItem
@@ -586,27 +578,27 @@ public:
 		int TicksToWait;
 	};
 
-	/// Queues the block to be ticked after the specified number of game ticks
+	/** Queues the block to be ticked after the specified number of game ticks */
 	void QueueBlockForTick(int a_BlockX, int a_BlockY, int a_BlockZ, int a_TicksToWait);  // tolua_export
 
 	// tolua_begin
-	/// Casts a thunderbolt at the specified coords
+	/** Casts a thunderbolt at the specified coords */
 	void CastThunderbolt(int a_BlockX, int a_BlockY, int a_BlockZ);
 	
-	/// Sets the specified weather; resets weather interval; asks and notifies plugins of the change
+	/** Sets the specified weather; resets weather interval; asks and notifies plugins of the change */
 	void SetWeather     (eWeather a_NewWeather);
 	
-	/// Forces a weather change in the next game tick
+	/** Forces a weather change in the next game tick */
 	void ChangeWeather  (void);
 	
-	/// Returns the current weather. Instead of comparing values directly to the weather constants, use IsWeatherXXX() functions, if possible
+	/** Returns the current weather. Instead of comparing values directly to the weather constants, use IsWeatherXXX() functions, if possible */
 	eWeather GetWeather     (void) const { return m_Weather; };
 	
 	bool IsWeatherSunny(void) const { return (m_Weather == wSunny); }
 	bool IsWeatherRain (void) const { return (m_Weather == wRain); }
 	bool IsWeatherStorm(void) const { return (m_Weather == wStorm); }
 	
-	/// Returns true if the current weather has any precipitation - rain or storm
+	/** Returns true if the current weather has any precipitation - rain or storm */
 	bool IsWeatherWet  (void) const { return (m_Weather != wSunny); }
 	
 	// tolua_end
@@ -615,7 +607,7 @@ public:
 	cWorldStorage &   GetStorage  (void) { return m_Storage; }
 	cChunkMap *       GetChunkMap (void) { return m_ChunkMap; }
 		
-	/// Sets the blockticking to start at the specified block. Only one blocktick per chunk may be set, second call overwrites the first call
+	/** Sets the blockticking to start at the specified block. Only one blocktick per chunk may be set, second call overwrites the first call */
 	void SetNextBlockTick(int a_BlockX, int a_BlockY, int a_BlockZ);  // tolua_export
 	
 	int GetMaxSugarcaneHeight(void) const { return m_MaxSugarcaneHeight; }  // tolua_export
@@ -623,20 +615,20 @@ public:
 
 	bool IsBlockDirectlyWatered(int a_BlockX, int a_BlockY, int a_BlockZ);  // tolua_export
 	
-	/// Spawns a mob of the specified type. Returns the mob's EntityID if recognized and spawned, <0 otherwise
+	/** Spawns a mob of the specified type. Returns the mob's EntityID if recognized and spawned, <0 otherwise */
 	int SpawnMob(double a_PosX, double a_PosY, double a_PosZ, cMonster::eType a_MonsterType);  // tolua_export
 	int SpawnMobFinalize(cMonster* a_Monster);
 	
-	/// Creates a projectile of the specified type. Returns the projectile's EntityID if successful, <0 otherwise
+	/** Creates a projectile of the specified type. Returns the projectile's EntityID if successful, <0 otherwise */
 	int CreateProjectile(double a_PosX, double a_PosY, double a_PosZ, cProjectileEntity::eKind a_Kind, cEntity * a_Creator, const Vector3d * a_Speed = NULL);  // tolua_export
 	
-	/// Returns a random number from the m_TickRand in range [0 .. a_Range]. To be used only in the tick thread!
+	/** Returns a random number from the m_TickRand in range [0 .. a_Range]. To be used only in the tick thread! */
 	int GetTickRandomNumber(unsigned a_Range) { return (int)(m_TickRand.randInt(a_Range)); }
 	
-	/// Appends all usernames starting with a_Text (case-insensitive) into Results
+	/** Appends all usernames starting with a_Text (case-insensitive) into Results */
 	void TabCompleteUserName(const AString & a_Text, AStringVector & a_Results);
 
-	/// Get the current darkness level based on the time
+	/** Get the current darkness level based on the time */
 	NIBBLETYPE GetSkyDarkness() { return m_SkyDarkness; }
 
 private:
@@ -679,18 +671,41 @@ private:
 	} ;
 	
 
+	/** A container for tasks that have been scheduled for a specific game tick */
+	class cScheduledTask
+	{
+	public:
+		Int64 m_TargetTick;
+		cTask * m_Task;
+		
+		/** Creates a new scheduled task; takes ownership of the task object passed to it. */
+		cScheduledTask(Int64 a_TargetTick, cTask * a_Task) :
+			m_TargetTick(a_TargetTick),
+			m_Task(a_Task)
+		{
+		}
+		
+		virtual ~cScheduledTask()
+		{
+			delete m_Task;
+		}
+	};
+
+	typedef std::list<cScheduledTask *> cScheduledTasks;
+
+
 	AString m_WorldName;
 	AString m_IniFileName;
 	
-	/// Name of the storage schema used to load and save chunks
+	/** Name of the storage schema used to load and save chunks */
 	AString m_StorageSchema;
 	
 	int m_StorageCompressionFactor;
 	
-	/// The dimension of the world, used by the client to provide correct lighting scheme
+	/** The dimension of the world, used by the client to provide correct lighting scheme */
 	eDimension m_Dimension;
 	
-	/// This random generator is to be used only in the Tick() method, and thus only in the World-Tick-thread (MTRand is not exactly thread-safe)
+	/** This random generator is to be used only in the Tick() method, and thus only in the World-Tick-thread (MTRand is not exactly thread-safe) */
 	MTRand m_TickRand;
 
 	bool m_IsSpawnExplicitlySet;
@@ -765,29 +780,30 @@ private:
 	cLightingThread  m_Lighting;
 	cTickThread      m_TickThread;
 	
-	/// Guards the m_Tasks
+	/** Guards the m_Tasks */
 	cCriticalSection m_CSTasks;
 	
-	/// Guards the m_ScheduledTasks
+	/** Tasks that have been queued onto the tick thread; guarded by m_CSTasks */
-	cCriticalSection m_CSScheduledTasks;
-	
-	/// Tasks that have been queued onto the tick thread; guarded by m_CSTasks
 	cTasks m_Tasks;
 	
-	/// Tasks that have been queued to be executed on the tick thread at some number of ticks in
+	/** Guards the m_ScheduledTasks */
-	/// the future; guarded by m_CSScheduledTasks
+	cCriticalSection m_CSScheduledTasks;
-	ScheduledTaskList m_ScheduledTasks;
 	
-	/// Guards m_Clients
+	/** Tasks that have been queued to be executed on the tick thread at target tick in the future.
+	Ordered by increasing m_TargetTick.
+	Guarded by m_CSScheduledTasks */
+	cScheduledTasks m_ScheduledTasks;
+	
+	/** Guards m_Clients */
 	cCriticalSection  m_CSClients;
 	
-	/// List of clients in this world, these will be ticked by this world
+	/** List of clients in this world, these will be ticked by this world */
 	cClientHandleList m_Clients;
 	
-	/// Clients that are scheduled for removal (ticked in another world), waiting for TickClients() to remove them
+	/** Clients that are scheduled for removal (ticked in another world), waiting for TickClients() to remove them */
 	cClientHandleList m_ClientsToRemove;
 	
-	/// Clients that are scheduled for adding, waiting for TickClients to add them
+	/** Clients that are scheduled for adding, waiting for TickClients to add them */
 	cClientHandleList m_ClientsToAdd;
 
 
@@ -796,27 +812,27 @@ private:
 
 	void Tick(float a_Dt, int a_LastTickDurationMSec);
 
-	/// Handles the weather in each tick
+	/** Handles the weather in each tick */
 	void TickWeather(float a_Dt);
 	
-	/// Handles the mob spawning/moving/destroying each tick
+	/** Handles the mob spawning/moving/destroying each tick */
 	void TickMobs(float a_Dt);
 	
-	/// Executes all tasks queued onto the tick thread
+	/** Executes all tasks queued onto the tick thread */
 	void TickQueuedTasks(void);
 	
-	/// Executes all tasks queued onto the tick thread
+	/** Executes all tasks queued onto the tick thread */
 	void TickScheduledTasks(void);
 	
-	/// Ticks all clients that are in this world
+	/** Ticks all clients that are in this world */
 	void TickClients(float a_Dt);
 
 	void UpdateSkyDarkness(void);
 
-	/// <summary>Generates a random spawnpoint on solid land by walking chunks and finding their biomes</summary>
+	/** <summary>Generates a random spawnpoint on solid land by walking chunks and finding their biomes</summary> */
 	void GenerateRandomSpawn(void);
 	
-	/// Creates a new fluid simulator, loads its settings from the inifile (a_FluidName section)
+	/** Creates a new fluid simulator, loads its settings from the inifile (a_FluidName section) */
 	cFluidSimulator * InitializeFluidSimulator(cIniFile & a_IniFile, const char * a_FluidName, BLOCKTYPE a_SimulateBlock, BLOCKTYPE a_StationaryBlock);
 }; // tolua_export