[Truffle] Add Method#hash

jruby · Sep 15, 2016 · 93cc335 · 93cc335
1 parent a9b6515
commit 93cc335
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Showing 2 changed files with 16 additions and 2 deletions.
diff --git a/spec/truffle/tags/core/method/hash_tags.txt b/spec/truffle/tags/core/method/hash_tags.txt
diff --git a/truffle/src/main/java/org/jruby/truffle/core/method/MethodNodes.java b/truffle/src/main/java/org/jruby/truffle/core/method/MethodNodes.java
@@ -20,8 +20,10 @@
 import com.oracle.truffle.api.nodes.RootNode;
 import com.oracle.truffle.api.object.DynamicObject;
 import com.oracle.truffle.api.source.SourceSection;
+import jnr.ffi.annotations.In;
 import org.jcodings.specific.UTF8Encoding;
 import org.jruby.runtime.ArgumentDescriptor;
+import org.jruby.runtime.Helpers;
 import org.jruby.truffle.Layouts;
 import org.jruby.truffle.RubyContext;
 import org.jruby.truffle.builtins.CoreClass;
@@ -104,6 +106,20 @@ public DynamicObject name(DynamicObject method) {
 
     }
 
+    @CoreMethod(names = "hash")
+    public abstract static class HashNode extends CoreMethodArrayArgumentsNode {
+
+        @Specialization
+        public long hash(DynamicObject rubyMethod) {
+            final InternalMethod method = Layouts.METHOD.getMethod(rubyMethod);
+            long h = Helpers.hashStart(getContext().getJRubyRuntime(), method.getDeclaringModule().hashCode());
+            h = Helpers.murmurCombine(h, Layouts.METHOD.getReceiver(rubyMethod).hashCode());
+            h = Helpers.murmurCombine(h, method.getSharedMethodInfo().hashCode());
+            return Helpers.hashEnd(h);
+        }
+
+    }
+
     @CoreMethod(names = "owner")
     public abstract static class OwnerNode extends CoreMethodArrayArgumentsNode {