From e8e76a6058988cb0cff222579049fb6aa3cdb9c1 Mon Sep 17 00:00:00 2001
From: narroo <narroo@vt.edu>
Date: Mon, 10 Feb 2014 20:00:07 -0500
Subject: [PATCH] Fixed bug #385.  UnloadUnusedChunks now has the same
 interface as SaveAllChunks.  Meaning, QueueUnloadUnusedChunks and the
 supporting cTaskUnloadUnusedChunks has been added.  Use
 QueueUnloadUnusedChunks from now on to prevent deadlocking.

---
 lib/polarssl  |  2 +-
 src/World.cpp | 10 ++++++++++
 src/World.h   | 16 +++++++++++++++-
 3 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/lib/polarssl b/lib/polarssl
index 2cb1a0c40..2ceda5798 160000
--- a/lib/polarssl
+++ b/lib/polarssl
@@ -1 +1 @@
-Subproject commit 2cb1a0c4009ecf368ecc74eb428394e10f9e6d00
+Subproject commit 2ceda579893ceb23c5eb0d56df47dc235644e0f4
diff --git a/src/World.cpp b/src/World.cpp
index 662a9a4b8..9120f8d7d 100644
--- a/src/World.cpp
+++ b/src/World.cpp
@@ -2213,6 +2213,10 @@ void cWorld::UnloadUnusedChunks(void)
 }
 
 
+void cWorld::QueueUnloadUnusedChunks(void)
+{
+	QueueTask(new cWorld::cTaskUnloadUnusedChunks);
+}
 
 
 
@@ -2966,7 +2970,13 @@ void cWorld::cTaskSaveAllChunks::Run(cWorld & a_World)
 }
 
 
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cWorld::cTaskUnloadUnusedChunks
 
+void cWorld::cTaskUnloadUnusedChunks::Run(cWorld & a_World)
+{
+	a_World.UnloadUnusedChunks();
+}
 
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
diff --git a/src/World.h b/src/World.h
index 0174be03b..e4036d8df 100644
--- a/src/World.h
+++ b/src/World.h
@@ -99,6 +99,15 @@ public:
 	} ;
 	
 
+	class cTaskUnloadUnusedChunks :
+		public cTask
+	{
+	protected:
+		// cTask overrides:
+		virtual void Run(cWorld & a_World) override;
+	};
+
+
 	static const char * GetClassStatic(void)  // Needed for ManualBindings's ForEach templates
 	{
 		return "cWorld";
@@ -243,7 +252,12 @@ public:
 	bool IsChunkValid      (int a_ChunkX, int a_ChunkZ) const;
 	bool HasChunkAnyClients(int a_ChunkX, int a_ChunkZ) const;
 	
-	void UnloadUnusedChunks(void);    // tolua_export
+	
+	/*Unloads all chunks immediately. Dangerous interface, may deadlock, use QueueUnloadUnusedChunks() instead*/
+	void UnloadUnusedChunks(void);
+
+	/*Queues a task to unload unused chunks onto the tick thread. The prefferred way of unloading*/
+	void QueueUnloadUnusedChunks(void);  // tolua_export
 	
 	void CollectPickupsByPlayer(cPlayer * a_Player);