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.Addressable;
26 import jdk.incubator.foreign.CLinker;
27 import jdk.incubator.foreign.FunctionDescriptor;
28 import jdk.incubator.foreign.MemoryAddress;
29 import jdk.incubator.foreign.SymbolLookup;
30 import jdk.incubator.foreign.ResourceScope;
31 import org.openjdk.jmh.annotations.Benchmark;
32 import org.openjdk.jmh.annotations.BenchmarkMode;
33 import org.openjdk.jmh.annotations.Fork;
34 import org.openjdk.jmh.annotations.Measurement;
35 import org.openjdk.jmh.annotations.Mode;
36 import org.openjdk.jmh.annotations.OutputTimeUnit;
37 import org.openjdk.jmh.annotations.State;
38 import org.openjdk.jmh.annotations.Warmup;
39 
40 import java.lang.invoke.MethodHandle;
41 import java.util.concurrent.TimeUnit;
42 
43 @BenchmarkMode(Mode.AverageTime)
44 @Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS)
45 @Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
46 @State(org.openjdk.jmh.annotations.Scope.Thread)
47 @OutputTimeUnit(TimeUnit.NANOSECONDS)
48 @Fork(value = 3, jvmArgsAppend = { "--add-modules=jdk.incubator.foreign", "--enable-native-access=ALL-UNNAMED" })
49 public class VaList extends CLayouts {
50 
51     static final CLinker linker = CLinker.systemCLinker();
52     static {
53         System.loadLibrary("VaList");
54     }
55 
56     static final MethodHandle MH_ellipsis;
57     static final MethodHandle MH_vaList;
58 
59     static {
60         SymbolLookup lookup = SymbolLookup.loaderLookup();
61         MH_ellipsis = linker.downcallHandle(lookup.lookup("ellipsis").get(),
62                 FunctionDescriptor.ofVoid(C_INT).asVariadic(C_INT, C_DOUBLE, C_LONG_LONG));
63         MH_vaList = linker.downcallHandle(lookup.lookup("vaList").get(),
64                 FunctionDescriptor.ofVoid(C_INT, C_POINTER));
65     }
66 
67     @Benchmark
68     public void ellipsis() throws Throwable {
69         MH_ellipsis.invokeExact(3,
70                                 1, 2D, 3L);
71     }
72 
73     @Benchmark
74     public void vaList() throws Throwable {
75         try (ResourceScope scope = ResourceScope.newConfinedScope()) {
76             jdk.incubator.foreign.VaList vaList = jdk.incubator.foreign.VaList.make(b ->
77                     b.addVarg(C_INT, 1)
78                             .addVarg(C_DOUBLE, 2D)
79                             .addVarg(C_LONG_LONG, 3L), scope);
80             MH_vaList.invokeExact(3,
81                     (Addressable)vaList);
82         }
83     }
84 }