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JNI Test

This commit is contained in:
Andrea Cavalli 2017-12-11 18:09:00 +01:00
parent 44ebaa787f
commit d22faf0359
7 changed files with 282 additions and 0 deletions
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83
.cproject Normal file
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<?fileVersion 4.0.0?><cproject storage_type_id="org.eclipse.cdt.core.XmlProjectDescriptionStorage">
<storageModule moduleId="org.eclipse.cdt.core.settings">
<cconfiguration id="0.243909357">
<storageModule buildSystemId="org.eclipse.cdt.managedbuilder.core.configurationDataProvider" id="0.243909357" moduleId="org.eclipse.cdt.core.settings" name="Default">
<externalSettings/>
<extensions>
<extension id="org.eclipse.cdt.core.GASErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
<extension id="org.eclipse.cdt.core.GmakeErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
<extension id="org.eclipse.cdt.core.GLDErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
<extension id="org.eclipse.cdt.core.VCErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
<extension id="org.eclipse.cdt.core.CWDLocator" point="org.eclipse.cdt.core.ErrorParser"/>
<extension id="org.eclipse.cdt.core.GCCErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
</extensions>
</storageModule>
<storageModule moduleId="cdtBuildSystem" version="4.0.0">
<configuration artifactName="${ProjName}" buildProperties="" description="" id="0.243909357" name="Default" parent="org.eclipse.cdt.build.core.prefbase.cfg">
<folderInfo id="0.243909357." name="/" resourcePath="">
<toolChain id="org.eclipse.cdt.build.core.prefbase.toolchain.230974560" name="No ToolChain" resourceTypeBasedDiscovery="false" superClass="org.eclipse.cdt.build.core.prefbase.toolchain">
<targetPlatform id="org.eclipse.cdt.build.core.prefbase.toolchain.230974560.1020516125" name=""/>
<builder id="org.eclipse.cdt.build.core.settings.default.builder.1750223979" incrementalBuildTarget="all" keepEnvironmentInBuildfile="false" managedBuildOn="false" name="Gnu Make Builder" superClass="org.eclipse.cdt.build.core.settings.default.builder"/>
<tool id="org.eclipse.cdt.build.core.settings.holder.libs.1329659482" name="holder for library settings" superClass="org.eclipse.cdt.build.core.settings.holder.libs"/>
<tool id="org.eclipse.cdt.build.core.settings.holder.164361898" name="Assembly" superClass="org.eclipse.cdt.build.core.settings.holder">
<inputType id="org.eclipse.cdt.build.core.settings.holder.inType.91955504" languageId="org.eclipse.cdt.core.assembly" languageName="Assembly" sourceContentType="org.eclipse.cdt.core.asmSource" superClass="org.eclipse.cdt.build.core.settings.holder.inType"/>
</tool>
<tool id="org.eclipse.cdt.build.core.settings.holder.587173658" name="GNU C++" superClass="org.eclipse.cdt.build.core.settings.holder">
<inputType id="org.eclipse.cdt.build.core.settings.holder.inType.752272386" languageId="org.eclipse.cdt.core.g++" languageName="GNU C++" sourceContentType="org.eclipse.cdt.core.cxxSource,org.eclipse.cdt.core.cxxHeader" superClass="org.eclipse.cdt.build.core.settings.holder.inType"/>
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<inputType id="org.eclipse.cdt.build.core.settings.holder.inType.1739537780" languageId="org.eclipse.cdt.core.gcc" languageName="GNU C" sourceContentType="org.eclipse.cdt.core.cSource,org.eclipse.cdt.core.cHeader" superClass="org.eclipse.cdt.build.core.settings.holder.inType"/>
</tool>
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<storageModule moduleId="org.eclipse.cdt.core.externalSettings"/>
</cconfiguration>
</storageModule>
<storageModule moduleId="cdtBuildSystem" version="4.0.0">
<project id="PICalculator.null.699279890" name="PICalculator"/>
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<autodiscovery enabled="true" problemReportingEnabled="true" selectedProfileId=""/>
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<configuration configurationName="Default">
<resource resourceType="PROJECT" workspacePath="/PICalculator"/>
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<target name="TestJNI.h" path="src/main/jni" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
<buildCommand>make</buildCommand>
<buildArguments/>
<buildTarget>TestJNI.h</buildTarget>
<stopOnError>true</stopOnError>
<useDefaultCommand>true</useDefaultCommand>
<runAllBuilders>true</runAllBuilders>
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<target name="all" path="src/main/jni" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
<buildCommand>make</buildCommand>
<buildArguments/>
<buildTarget>all</buildTarget>
<stopOnError>true</stopOnError>
<useDefaultCommand>true</useDefaultCommand>
<runAllBuilders>true</runAllBuilders>
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<target name="clean" path="src/main/jni" targetID="org.eclipse.cdt.build.MakeTargetBuilder">
<buildCommand>make</buildCommand>
<buildArguments/>
<buildTarget>clean</buildTarget>
<stopOnError>true</stopOnError>
<useDefaultCommand>true</useDefaultCommand>
<runAllBuilders>true</runAllBuilders>
</target>
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</cproject>

145
src/main/java/cz/adamh/utils/NativeUtils.java Normal file
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/*
* Class NativeUtils is published under the The MIT License:
*
* Copyright (c) 2012 Adam Heinrich <adam@adamh.cz>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package cz.adamh.utils;
import java.io.*;
import java.nio.file.FileSystemNotFoundException;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.ProviderNotFoundException;
import java.nio.file.StandardCopyOption;
/**
* A simple library class which helps with loading dynamic libraries stored in the
* JAR archive. These libraries usualy contain implementation of some methods in
* native code (using JNI - Java Native Interface).
*
* @see http://adamheinrich.com/blog/2012/how-to-load-native-jni-library-from-jar
* @see https://github.com/adamheinrich/native-utils
*
*/
public class NativeUtils {
/**
* The minimum length a prefix for a file has to have according to {@link File#createTempFile(String, String)}}.
*/
private static final int MIN_PREFIX_LENGTH = 3;
/**
* Temporary directory which will contain the DLLs.
*/
private static File temporaryDir;
/**
* Private constructor - this class will never be instanced
*/
private NativeUtils() {
}
/**
* Loads library from current JAR archive
*
* The file from JAR is copied into system temporary directory and then loaded. The temporary file is deleted after
* exiting.
* Method uses String as filename because the pathname is "abstract", not system-dependent.
*
* @param path The path of file inside JAR as absolute path (beginning with '/'), e.g. /package/File.ext
* @throws IOException If temporary file creation or read/write operation fails
* @throws IllegalArgumentException If source file (param path) does not exist
* @throws IllegalArgumentException If the path is not absolute or if the filename is shorter than three characters
* (restriction of {@link File#createTempFile(java.lang.String, java.lang.String)}).
* @throws FileNotFoundException If the file could not be found inside the JAR.
*/
public static void loadLibraryFromJar(String path) throws IOException {
if (!path.startsWith("/")) {
throw new IllegalArgumentException("The path has to be absolute (start with '/').");
}
// Obtain filename from path
String[] parts = path.split("/");
String filename = (parts.length > 1) ? parts[parts.length - 1] : null;
// Check if the filename is okay
if (filename == null || filename.length() < MIN_PREFIX_LENGTH) {
throw new IllegalArgumentException("The filename has to be at least 3 characters long.");
}
// Prepare temporary file
if (temporaryDir == null) {
temporaryDir = createTempDirectory("nativeutils");
temporaryDir.deleteOnExit();
}
File temp = new File(temporaryDir, filename);
try (InputStream is = NativeUtils.class.getResourceAsStream(path)) {
Files.copy(is, temp.toPath(), StandardCopyOption.REPLACE_EXISTING);
} catch (IOException e) {
temp.delete();
throw e;
} catch (NullPointerException e) {
temp.delete();
throw new FileNotFoundException("File " + path + " was not found inside JAR.");
}
try {
System.load(temp.getAbsolutePath());
} finally {
if (isPosixCompliant()) {
// Assume POSIX compliant file system, can be deleted after loading
temp.delete();
} else {
// Assume non-POSIX, and don't delete until last file descriptor closed
temp.deleteOnExit();
}
}
}
private static boolean isPosixCompliant() {
try {
if (FileSystems.getDefault()
.supportedFileAttributeViews()
.contains("posix")) {
return true;
}
return false;
} catch (FileSystemNotFoundException
| ProviderNotFoundException
| SecurityException e) {
return false;
}
}
private static File createTempDirectory(String prefix) throws IOException
{
String tempDir = System.getProperty("java.io.tmpdir");
File generatedDir = new File(tempDir, prefix + System.nanoTime());
if (!generatedDir.mkdir())
throw new IOException("Failed to create temp directory " + generatedDir.getName());
return generatedDir;
}
}

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src/main/jni/TestJNI.c Normal file
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#include <jni.h>
#include <stdio.h>
#include "TestJNI.h"
JNIEXPORT void JNICALL Java_org_warp_picalculator_TestJNI_sayHello(JNIEnv *env, jobject thisObj)
{
printf("Hello World!\n");
return;
}

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src/main/jni/TestJNI.h Normal file
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/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class org_warp_picalculator_TestJNI */
#ifndef _Included_org_warp_picalculator_TestJNI
#define _Included_org_warp_picalculator_TestJNI
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class: org_warp_picalculator_TestJNI
* Method: sayHello
* Signature: ()V
*/
JNIEXPORT void JNICALL Java_org_warp_picalculator_TestJNI_sayHello
(JNIEnv *, jobject);
#ifdef __cplusplus
}
#endif
#endif

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src/main/jni/TestJNI.o Normal file
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src/main/jni/makefile Normal file
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# Define a variable for classpath
CLASS_PATH = ../../../target/classes
PATH1A = org/warp/picalculator
PATH1B = org.warp.picalculator
# Define a virtual path for .class in the bin directory
vpath %.class $(CLASS_PATH)/$(PATH1A)
all : picalculatornative.dll
# $@ matches the target, $< matches the first dependancy
picalculatornative.dll : TestJNI.o
x86_64-w64-mingw32-gcc.exe -m64 -mtune=generic -Wl,--add-stdcall-alias -shared -o ../resources/$@ $<
# $@ matches the target, $< matches the first dependancy
TestJNI.o : TestJNI.c TestJNI.h
x86_64-w64-mingw32-gcc.exe -m64 -mtune=generic -I"G:\Program Files\Java\jdk1.8.0_144\include" -I"G:\Program Files\Java\jdk1.8.0_144\include\win32" -c $< -o $@
# $* matches the target filename without the extension
TestJNI.h : TestJNI.class
javah -o "$*.h" -classpath "$(CLASS_PATH)" $(PATH1B).$*
clean :
rm TestJNI.h TestJNI.o ../resources/picalculatornative.dll

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src/main/resources/picalculatornative.dll Normal file
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