1 /* 2 * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.openjdk.bench.jdk.incubator.foreign; 24 25 import jdk.incubator.foreign.CSupport; 26 import jdk.incubator.foreign.ForeignLinker; 27 import jdk.incubator.foreign.FunctionDescriptor; 28 import jdk.incubator.foreign.LibraryLookup; 29 import org.openjdk.jmh.annotations.Benchmark; 30 import org.openjdk.jmh.annotations.BenchmarkMode; 31 import org.openjdk.jmh.annotations.Fork; 32 import org.openjdk.jmh.annotations.Measurement; 33 import org.openjdk.jmh.annotations.Mode; 34 import org.openjdk.jmh.annotations.OutputTimeUnit; 35 import org.openjdk.jmh.annotations.State; 36 import org.openjdk.jmh.annotations.Warmup; 37 38 import java.lang.invoke.MethodHandle; 39 import java.lang.invoke.MethodType; 40 import java.util.concurrent.TimeUnit; 41 42 import static jdk.incubator.foreign.CSupport.C_DOUBLE; 43 import static jdk.incubator.foreign.CSupport.C_INT; 44 import static jdk.incubator.foreign.CSupport.C_LONGLONG; 45 import static jdk.incubator.foreign.CSupport.Win64.asVarArg; 46 47 @BenchmarkMode(Mode.AverageTime) 48 @Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS) 49 @Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS) 50 @State(org.openjdk.jmh.annotations.Scope.Thread) 51 @OutputTimeUnit(TimeUnit.NANOSECONDS) 52 @Fork(3) 53 public class VaList { 54 55 static final ForeignLinker linker = CSupport.getSystemLinker(); 56 static final LibraryLookup lookup = LibraryLookup.ofLibrary("VaList"); 57 58 static final MethodHandle MH_ellipsis; 59 static final MethodHandle MH_vaList; 60 61 static { 62 try { 63 MH_ellipsis = linker.downcallHandle(lookup.lookup("ellipsis"), 64 MethodType.methodType(void.class, int.class, int.class, double.class, long.class), 65 FunctionDescriptor.ofVoid(C_INT, asVarArg(C_INT), asVarArg(C_DOUBLE), asVarArg(C_LONGLONG))); 66 MH_vaList = linker.downcallHandle(lookup.lookup("vaList"), 67 MethodType.methodType(void.class, int.class, CSupport.VaList.class), 68 FunctionDescriptor.ofVoid(C_INT, CSupport.C_VA_LIST)); 69 } catch (NoSuchMethodException e) { 70 throw new InternalError(e); 71 } 72 } 73 74 @Benchmark 75 public void ellipsis() throws Throwable { 76 MH_ellipsis.invokeExact(3, 77 1, 2D, 3L); 78 } 79 80 @Benchmark 81 public void vaList() throws Throwable { 82 try (CSupport.VaList vaList = CSupport.VaList.make(b -> 83 b.vargFromInt(C_INT, 1) 84 .vargFromDouble(C_DOUBLE, 2D) 85 .vargFromLong(C_LONGLONG, 3L) 86 )) { 87 MH_vaList.invokeExact(3, 88 vaList); 89 } 90 } 91 }