1 /*
2 * Copyright (c) 2022, 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
24 package org.openjdk.bench.java.lang.foreign;
25
26 import java.lang.foreign.*;
27
28 import org.openjdk.jmh.annotations.Benchmark;
29 import org.openjdk.jmh.annotations.BenchmarkMode;
30 import org.openjdk.jmh.annotations.Fork;
31 import org.openjdk.jmh.annotations.TearDown;
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.util.concurrent.TimeUnit;
40
41 @BenchmarkMode(Mode.AverageTime)
42 @Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS)
43 @Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
44 @State(org.openjdk.jmh.annotations.Scope.Thread)
45 @OutputTimeUnit(TimeUnit.NANOSECONDS)
46 @Fork(value = 3, jvmArgsAppend = { "--enable-native-access=ALL-UNNAMED" })
47 public class PointerInvoke extends CLayouts {
48
49 Arena arena = Arena.ofConfined();
50 MemorySegment segment = arena.allocate(100, 1);
51
52 static {
53 System.loadLibrary("Ptr");
54 }
55
56 static final MethodHandle F_LONG_LONG, F_PTR_LONG, F_LONG_PTR, F_PTR_PTR;
57
58 static {
59 Linker abi = Linker.nativeLinker();
60 SymbolLookup loaderLibs = SymbolLookup.loaderLookup();
61 F_LONG_LONG = abi.downcallHandle(loaderLibs.find("id_long_long").get(),
62 FunctionDescriptor.of(C_LONG_LONG, C_LONG_LONG));
63 F_PTR_LONG = abi.downcallHandle(loaderLibs.find("id_ptr_long").get(),
64 FunctionDescriptor.of(C_LONG_LONG, C_POINTER));
65 F_LONG_PTR = abi.downcallHandle(loaderLibs.find("id_long_ptr").get(),
66 FunctionDescriptor.of(C_POINTER, C_LONG_LONG));
67 F_PTR_PTR = abi.downcallHandle(loaderLibs.find("id_ptr_ptr").get(),
68 FunctionDescriptor.of(C_POINTER, C_POINTER));
69 }
70
71 @TearDown
72 public void tearDown() {
73 arena.close();
74 }
75
76 @Benchmark
77 public long long_to_long() throws Throwable {
78 return (long)F_LONG_LONG.invokeExact(segment.address());
79 }
80
81 @Benchmark
82 public long ptr_to_long() throws Throwable {
83 return (long)F_PTR_LONG.invokeExact(segment);
84 }
85
86 @Benchmark
87 public long ptr_to_long_new_segment() throws Throwable {
88 MemorySegment newSegment = segment.reinterpret(100, arena, null);
89 return (long)F_PTR_LONG.invokeExact(newSegment);
90 }
91
92 @Benchmark
93 public long long_to_ptr() throws Throwable {
94 return ((MemorySegment)F_LONG_PTR.invokeExact(segment.address())).address();
95 }
96
97 @Benchmark
98 public long ptr_to_ptr() throws Throwable {
99 return ((MemorySegment)F_PTR_PTR.invokeExact(segment)).address();
100 }
101
102 @Benchmark
103 public long ptr_to_ptr_new_segment() throws Throwable {
104 MemorySegment newSegment = segment.reinterpret(100, arena, null);
105 return ((MemorySegment)F_PTR_PTR.invokeExact(newSegment)).address();
106 }
107 }