# HG changeset patch
# User Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
# Date 1339164452 -7200
# Node ID 1319b704541dc339a86012576727b6c4c81268d3
# Parent  13321732f85c0155134e456220314664575c452a
Return GraalRuntime with no capabilities if VM does not support creation of GraalRuntime instance.

diff -r 13321732f85c -r 1319b704541d graal/com.oracle.graal.api/src/com/oracle/graal/api/Graal.java
--- a/graal/com.oracle.graal.api/src/com/oracle/graal/api/Graal.java	Fri Jun 08 15:42:16 2012 +0200
+++ b/graal/com.oracle.graal.api/src/com/oracle/graal/api/Graal.java	Fri Jun 08 16:07:32 2012 +0200
@@ -25,8 +25,7 @@
 
 public class Graal {
 
-    private static GraalRuntime runtime;
-    private static volatile boolean initialized;
+    private static volatile GraalRuntime runtime;
 
     private static native GraalRuntime initializeRuntime();
 
@@ -35,21 +34,25 @@
         return runtime;
     }
 
-    public static boolean hasRuntime() {
-        return getRuntime() != null;
-    }
-
     private static void ensureInitialized() {
-        boolean wasInitialized = initialized;
-        if (!wasInitialized) {
+        GraalRuntime oldValue = runtime;
+        if (oldValue == null) {
             synchronized (Graal.class) {
-                if (!initialized) {
+                if (runtime == null) {
                     try {
                         runtime = initializeRuntime();
                     } catch (UnsatisfiedLinkError e) {
-                        runtime = null;
+                        runtime = new GraalRuntime() {
+                            @Override
+                            public String getName() {
+                                return "";
+                            }
+                            @Override
+                            public <T> T getCapability(Class<T> clazz) {
+                                return null;
+                            }
+                        };
                     }
-                    initialized = true;
                 }
             }
         }