8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

src/java.base/share/classes/java/lang/invoke/VarForm.java

@@ -0,0 +1,142 @@
+/*
+ * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package java.lang.invoke;
+
+import jdk.internal.vm.annotation.ForceInline;
+import jdk.internal.vm.annotation.Stable;
+
+import java.lang.invoke.VarHandle.AccessMode;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * A var handle form containing a set of member name, one for each operation.
+ * Each member characterizes a static method.
+ */
+final class VarForm {
+
+    final @Stable MethodType[] methodType_table;
+
+    final @Stable MemberName[] memberName_table;
+
+    VarForm(Class<?> implClass, Class<?> receiver, Class<?> value, Class<?>... intermediate) {
+        this.methodType_table = new MethodType[VarHandle.AccessType.values().length];
+
+        // TODO lazily calculate
+        this.memberName_table = linkFromStatic(implClass);
+
+        // (Receiver, <Intermediates>)
+        List<Class<?>> l = new ArrayList<>();
+        if (receiver != null)
+            l.add(receiver);
+        for (Class<?> c : intermediate)
+            l.add(c);
+
+        // (Receiver, <Intermediates>)Value
+        methodType_table[VarHandle.AccessType.GET.ordinal()] =
+                MethodType.methodType(value, l).erase();
+
+        // (Receiver, <Intermediates>, Value)void
+        l.add(value);
+        methodType_table[VarHandle.AccessType.SET.ordinal()] =
+                MethodType.methodType(void.class, l).erase();
+
+        // (Receiver, <Intermediates>, Value)Value
+        methodType_table[VarHandle.AccessType.GET_AND_UPDATE.ordinal()] =
+                MethodType.methodType(value, l).erase();
+
+        // (Receiver, <Intermediates>, Value, Value)boolean
+        l.add(value);
+        methodType_table[VarHandle.AccessType.COMPARE_AND_SWAP.ordinal()] =
+                MethodType.methodType(boolean.class, l).erase();
+
+        // (Receiver, <Intermediates>, Value, Value)Value
+        methodType_table[VarHandle.AccessType.COMPARE_AND_EXCHANGE.ordinal()] =
+                MethodType.methodType(value, l).erase();
+    }
+
+    @ForceInline
+    final MethodType getMethodType(int type) {
+        return methodType_table[type];
+    }
+
+    @ForceInline
+    final MemberName getMemberName(int mode) {
+        // TODO calculate lazily
+        MemberName mn = memberName_table[mode];
+        if (mn == null) {
+            throw new UnsupportedOperationException();
+        }
+        return mn;
+    }
+
+
+    @Stable
+    MethodType[] methodType_V_table;
+
+    @ForceInline
+    final MethodType[] getMethodType_V_init() {
+        MethodType[] table = new MethodType[VarHandle.AccessType.values().length];
+        for (int i = 0; i < methodType_table.length; i++) {
+            MethodType mt = methodType_table[i];
+            // TODO only adjust for sig-poly methods returning Object
+            table[i] = mt.changeReturnType(void.class);
+        }
+        methodType_V_table = table;
+        return table;
+    }
+
+    @ForceInline
+    final MethodType getMethodType_V(int type) {
+        MethodType[] table = methodType_V_table;
+        if (table == null) {
+            table = getMethodType_V_init();
+        }
+        return table[type];
+    }
+
+
+    /**
+     * Link all signature polymorphic methods.
+     */
+    private static MemberName[] linkFromStatic(Class<?> implClass) {
+        MemberName[] table = new MemberName[AccessMode.values().length];
+
+        for (Class<?> c = implClass; c != VarHandle.class; c = c.getSuperclass()) {
+            for (Method m : c.getDeclaredMethods()) {
+                if (Modifier.isStatic(m.getModifiers())) {
+                    AccessMode am = AccessMode.methodNameToAccessMode.get(m.getName());
+                    if (am != null) {
+                        assert table[am.ordinal()] == null;
+                        table[am.ordinal()] = new MemberName(m);
+                    }
+                }
+            }
+        }
+        return table;
+    }
+}