Maurizio Cimadamore mcimadamore
mcimadamore
/ Test.java
Created
June 3, 2022 21:49
Example of struct access with layouts and heap segments
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| import java.lang.foreign.MemoryLayout; | |
| import java.lang.foreign.MemorySegment; | |
| import java.lang.foreign.SequenceLayout; | |
| import java.lang.foreign.ValueLayout; | |
| import java.lang.invoke.VarHandle; | |
| public class Test { | |
| static final ValueLayout.OfChar JAVA_CHAR_UNALIGNED = ValueLayout.JAVA_CHAR.withBitAlignment(8); | |
| static final ValueLayout.OfInt JAVA_INT_UNALIGNED = ValueLayout.JAVA_INT.withBitAlignment(8); |
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| [ | |
| { | |
| "jmhVersion" : "1.22", | |
| "benchmark" : "org.openjdk.bench.jdk.incubator.foreign.LoopOverConstant.BB_get", | |
| "mode" : "avgt", | |
| "threads" : 1, | |
| "forks" : 3, | |
| "jvm" : "/w/lt/jdk/dev-18/build/linux-x86_64-server-release/images/jdk/bin/java", | |
| "jvmArgs" : [ | |
| "-Djava.library.path=/w/lt/jdk/dev-18/build/linux-x86_64-server-release/images/test/micro/native", |
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| [ | |
| { | |
| "jmhVersion" : "1.22", | |
| "benchmark" : "org.openjdk.bench.jdk.incubator.foreign.LoopOverConstant.BB_get", | |
| "mode" : "avgt", | |
| "threads" : 1, | |
| "forks" : 3, | |
| "jvm" : "/w/lt/jdk/dev-18/build/linux-x86_64-server-release/images/jdk/bin/java", | |
| "jvmArgs" : [ | |
| "-Djava.library.path=/w/lt/jdk/dev-18/build/linux-x86_64-server-release/images/test/micro/native", |
mcimadamore
/ 02_noworkarounds.json
Created
December 9, 2021 21:33
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| [ | |
| { | |
| "jmhVersion" : "1.22", | |
| "benchmark" : "org.openjdk.bench.jdk.incubator.foreign.LoopOverConstant.BB_get", | |
| "mode" : "avgt", | |
| "threads" : 1, | |
| "forks" : 3, | |
| "jvm" : "/w/lt/jdk/dev/build/linux-x86_64-server-release/images/jdk/bin/java", | |
| "jvmArgs" : [ | |
| "-Djava.library.path=/w/lt/jdk/dev/build/linux-x86_64-server-release/images/test/micro/native", |
mcimadamore
/ 01_no_workarounds.json
Created
December 9, 2021 14:55
Panama JMH benchmark w/o long loop workarounds
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| [ | |
| { | |
| "jmhVersion" : "1.22", | |
| "benchmark" : "org.openjdk.bench.jdk.incubator.foreign.LoopOverConstant.BB_get", | |
| "mode" : "avgt", | |
| "threads" : 1, | |
| "forks" : 3, | |
| "jvm" : "/w/lt/jdk/dev/build/linux-x86_64-server-release/images/jdk/bin/java", | |
| "jvmArgs" : [ | |
| "-Djava.library.path=/w/lt/jdk/dev/build/linux-x86_64-server-release/images/test/micro/native", |
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| [ | |
| { | |
| "jmhVersion" : "1.22", | |
| "benchmark" : "org.openjdk.bench.jdk.incubator.foreign.LoopOverConstant.BB_get", | |
| "mode" : "avgt", | |
| "threads" : 1, | |
| "forks" : 3, | |
| "jvm" : "/w/lt/jdk/dev/build/linux-x86_64-server-release/images/jdk/bin/java", | |
| "jvmArgs" : [ | |
| "-Djava.library.path=/w/lt/jdk/dev/build/linux-x86_64-server-release/images/test/micro/native", |
mcimadamore
/ Malloc.java
Created
October 13, 2021 11:13
A malloc allocator which doesn't zero memory
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| import jdk.incubator.foreign.Addressable; | |
| import jdk.incubator.foreign.CLinker; | |
| import jdk.incubator.foreign.FunctionDescriptor; | |
| import jdk.incubator.foreign.MemoryAddress; | |
| import jdk.incubator.foreign.MemorySegment; | |
| import jdk.incubator.foreign.ResourceScope; | |
| import jdk.incubator.foreign.SegmentAllocator; | |
| import jdk.incubator.foreign.ValueLayout; | |
| import java.lang.invoke.MethodHandle; |
mcimadamore
/ DlOpen.java
Created
May 22, 2021 21:51
DlOpen implementation using the Foreign Linker API
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| /* | |
| * Copyright (c) 2021, 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. | |
| * | |
| * This code is distributed in the hope that it will be useful, but WITHOUT | |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
mcimadamore
/ MemoryScope.java
Last active
May 12, 2020 21:25
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| /* | |
| * Copyright (c) 2020, 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. | |
| * |
mcimadamore
/ JStruct.java
Created
May 7, 2020 15:47
A simple jextract API plugin to generate all struct layouts in a given header file.
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| import jdk.incubator.foreign.GroupLayout; | |
| import jdk.incubator.foreign.MemoryLayout; | |
| import jdk.incubator.foreign.SequenceLayout; | |
| import jdk.incubator.foreign.ValueLayout; | |
| import jdk.incubator.jextract.Declaration; | |
| import jdk.incubator.jextract.JextractTask; | |
| import java.nio.file.Files; | |
| import java.nio.file.Path; | |
| import java.nio.file.Paths; |
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