simple test to see what happens with direct buffers (garbage collected?).

use "top" on linux or "Task Manager" on Win32. The answer is yes.

1 files changed, 45 insertions, 0 deletions

diff --git a/test/jake2/render/DisposeBuffer.java b/test/jake2/render/DisposeBuffer.java
new file mode 100644
index 0000000..d17157c
--- /dev/null
+++ b/test/jake2/render/DisposeBuffer.java
@@ -0,0 +1,45 @@
+/*
+ * Created on May 13, 2005
+ *
+ */
+package jake2.render;
+
+import java.nio.Buffer;
+import java.nio.ByteBuffer;
+
+/**
+ * @author cwei
+ *
+ */
+public class DisposeBuffer {
+
+    // 160 MB direct buffers
+    static int SIZE = 1024 * 1024;
+    static int COUNT = 160;
+    
+    public static void main(String[] args) {
+        System.out.println("DirectBuffer allocation.");
+        Buffer[] buf = new Buffer[COUNT];
+        Runtime run = Runtime.getRuntime();
+        System.gc();
+        for (int i = 0; i < COUNT; i++) {
+            buf[i] = ByteBuffer.allocateDirect(SIZE);
+        }
+        System.gc();
+        System.out.println((run.totalMemory() / 1024) + "KB heap");
+        try {
+            Thread.sleep(10000);
+        } catch (InterruptedException e) {
+        }
+        System.out.println("DirectBuffer dispose.");
+        for (int i = 0; i < COUNT; i++) {
+            buf[i] = null;
+        }
+        System.gc();
+        System.out.println((run.totalMemory() / 1024) + "KB heap");
+        try {
+            Thread.sleep(20000);
+        } catch (InterruptedException e) {
+        }
+    }
+}