[Truffle] Add UnboundMethod#hash

jruby · Sep 16, 2016 · 10ce714 · 10ce714
1 parent ac60bbe
commit 10ce714
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Showing 2 changed files with 16 additions and 2 deletions.
diff --git a/spec/truffle/tags/core/unboundmethod/hash_tags.txt b/spec/truffle/tags/core/unboundmethod/hash_tags.txt
diff --git a/truffle/src/main/java/org/jruby/truffle/core/method/UnboundMethodNodes.java b/truffle/src/main/java/org/jruby/truffle/core/method/UnboundMethodNodes.java
@@ -17,6 +17,7 @@
 import com.oracle.truffle.api.source.SourceSection;
 import org.jcodings.specific.UTF8Encoding;
 import org.jruby.runtime.ArgumentDescriptor;
+import org.jruby.runtime.Helpers;
 import org.jruby.runtime.Visibility;
 import org.jruby.truffle.Layouts;
 import org.jruby.truffle.RubyContext;
@@ -30,6 +31,7 @@
 import org.jruby.truffle.language.control.RaiseException;
 import org.jruby.truffle.language.methods.CanBindMethodToModuleNode;
 import org.jruby.truffle.language.methods.CanBindMethodToModuleNodeGen;
+import org.jruby.truffle.language.methods.InternalMethod;
 import org.jruby.truffle.language.objects.MetaClassNode;
 import org.jruby.truffle.language.objects.MetaClassNodeGen;
 
@@ -99,6 +101,20 @@ protected DynamicObject metaClass(Object object) {
 
     }
 
+    @CoreMethod(names = "hash")
+    public abstract static class HashNode extends CoreMethodArrayArgumentsNode {
+
+        @Specialization
+        public long hash(DynamicObject rubyMethod) {
+            final InternalMethod method = Layouts.UNBOUND_METHOD.getMethod(rubyMethod);
+            long h = Helpers.hashStart(getContext().getJRubyRuntime(), method.getDeclaringModule().hashCode());
+            h = Helpers.murmurCombine(h, Layouts.UNBOUND_METHOD.getOrigin(rubyMethod).hashCode());
+            h = Helpers.murmurCombine(h, method.getSharedMethodInfo().hashCode());
+            return Helpers.hashEnd(h);
+        }
+
+    }
+
     @CoreMethod(names = "name")
     public abstract static class NameNode extends CoreMethodArrayArgumentsNode {