Initial commit

1 files changed, 95 insertions, 0 deletions

diff --git a/NET/worlds/scape/BackgroundLoader.java b/NET/worlds/scape/BackgroundLoader.java
new file mode 100644
index 0000000..8f337a0
--- /dev/null
+++ b/NET/worlds/scape/BackgroundLoader.java
@@ -0,0 +1,95 @@
+package NET.worlds.scape;
+
+import NET.worlds.console.Main;
+import NET.worlds.console.MainCallback;
+import NET.worlds.network.URL;
+import java.util.Vector;
+
+public class BackgroundLoader implements MainCallback, Runnable {
+   private static BackgroundLoader bg = new BackgroundLoader();
+   private BackgroundLoaderQueue readQueue = new BackgroundLoaderQueue();
+   private BackgroundLoaderQueue asyncLoadQueue = new BackgroundLoaderQueue();
+   private Vector syncLoadQueue = new Vector();
+   private Thread asyncLoaderThread;
+   int nextSync = 0;
+
+   public static void get(BGLoaded loader, String remoteName) {
+      get(loader, URL.make(remoteName), false);
+   }
+
+   public static void get(BGLoaded loader, URL remoteName) {
+      get(loader, remoteName, false);
+   }
+
+   public static void get(BGLoaded loader, URL remoteName, boolean highPri) {
+      new BackgroundLoaderElement(loader, remoteName, highPri);
+   }
+
+   static void activeRoomChanged(Room room) {
+      bg.asyncLoadQueue.activeRoomChanged(room);
+   }
+
+   static void asyncLoad(BackgroundLoaderElement ele) {
+      bg.asyncLoadQueue.add(ele);
+   }
+
+   static void syncLoad(BackgroundLoaderElement ele) {
+      bg.syncLoadQueue.addElement(ele);
+   }
+
+   private BackgroundLoader() {
+      this.asyncLoaderThread = new Thread(this);
+      this.asyncLoaderThread.setDaemon(true);
+      this.asyncLoaderThread.start();
+      Main.register(this);
+   }
+
+   @Override
+   public void run() {
+      if ($assertionsDisabled || Thread.currentThread() == this.asyncLoaderThread) {
+         while (true) {
+            BackgroundLoaderElement ele = this.asyncLoadQueue.getItem();
+            ele.asyncLoad();
+            synchronized (this) {
+               this.syncLoadQueue.addElement(ele);
+
+               while (this.syncLoadQueue.size() > 0) {
+                  try {
+                     this.wait();
+                  } catch (InterruptedException var4) {
+                  }
+
+                  if (this.asyncLoadQueue.hasHighPriorityItems()) {
+                     break;
+                  }
+               }
+            }
+         }
+      }
+
+      throw new AssertionError();
+   }
+
+   @Override
+   public synchronized void mainCallback() {
+      if (this.syncLoadQueue.size() != 0) {
+         if (this.nextSync >= this.syncLoadQueue.size()) {
+            this.nextSync = 0;
+         }
+
+         BackgroundLoaderElement ele = (BackgroundLoaderElement)this.syncLoadQueue.elementAt(this.nextSync);
+         if (!ele.syncLoad()) {
+            this.syncLoadQueue.removeElementAt(this.nextSync);
+            if (this.syncLoadQueue.size() == 0) {
+               this.notify();
+            }
+         } else {
+            if (this.asyncLoadQueue.hasHighPriorityItems()) {
+               this.notify();
+            }
+
+            this.nextSync++;
+         }
+      }
+   }
+}