Unload unused regions after 5 minutes

src/pocketmine/level/Level.php

@@ -2269,6 +2269,8 @@ class Level implements ChunkManager, Metadatable{
 			}
 		}
 
+		$this->provider->doGarbageCollection();
+
 		$this->timings->doChunkGC->stopTiming();
 	}
 

src/pocketmine/level/format/LevelProvider.php

@@ -218,6 +218,8 @@ interface LevelProvider{
 	 */
 	public function getLoadedChunks();
 
+	public function doGarbageCollection();
+
 	/**
 	 * @return Level
 	 */

src/pocketmine/level/format/anvil/RegionLoader.php

@@ -50,6 +50,8 @@ class RegionLoader extends \pocketmine\level\format\mcregion\RegionLoader{
 		}else{
 			$this->loadLocationTable();
 		}
+
+		$this->lastUsed = time();
 	}
 
 	public function readChunk($x, $z, $generate = true, $forward = false){
@@ -58,6 +60,8 @@ class RegionLoader extends \pocketmine\level\format\mcregion\RegionLoader{
 			return null;
 		}
 
+		$this->lastUsed = time();
+
 		if(!$this->isChunkGenerated($index)){
 			if($generate === true){
 				//Allocate space

src/pocketmine/level/format/generic/BaseLevelProvider.php

@@ -105,6 +105,10 @@ abstract class BaseLevelProvider implements LevelProvider{
 		$this->levelData->SpawnZ = new Int("SpawnZ", (int) $pos->z);
 	}
 
+	public function doGarbageCollection(){
+
+	}
+
 	/**
 	 * @return Compound
 	 */

src/pocketmine/level/format/mcregion/McRegion.php

@@ -174,6 +174,16 @@ class McRegion extends BaseLevelProvider{
 		}
 	}
 
+	public function doGarbageCollection(){
+		$limit = time() - 300;
+		foreach($this->regions as $index => $region){
+			if($region->lastUsed <= $limit){
+				$region->close();
+				unset($this->regions[$index]);
+			}
+		}
+	}
+
 	public function loadChunk($chunkX, $chunkZ, $create = false){
 		$index = Level::chunkHash($chunkX, $chunkZ);
 		if(isset($this->chunks[$index])){

src/pocketmine/level/format/mcregion/RegionLoader.php

@@ -50,6 +50,8 @@ class RegionLoader{
 	protected $levelProvider;
 	protected $locationTable = [];
 
+	public $lastUsed;
+
 	public function __construct(LevelProvider $level, $regionX, $regionZ){
 		$this->x = $regionX;
 		$this->z = $regionZ;
@@ -65,6 +67,8 @@ class RegionLoader{
 		}else{
 			$this->loadLocationTable();
 		}
+
+		$this->lastUsed = time();
 	}
 
 	public function __destruct(){
@@ -84,6 +88,8 @@ class RegionLoader{
 			return null;
 		}
 
+		$this->lastUsed = time();
+
 		if(!$this->isChunkGenerated($index)){
 			if($generate === true){
 				//Allocate space
@@ -197,6 +203,7 @@ class RegionLoader{
 	}
 
 	public function writeChunk(FullChunk $chunk){
+		$this->lastUsed = time();
 		$chunkData = $chunk->toBinary();
 		if($chunkData !== false){
 			$this->saveChunk($chunk->getX() - ($this->getX() * 32), $chunk->getZ() - ($this->getZ() * 32), $chunkData);