| /* |
| * 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; |
| } |
| } |