X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/4e90ee55b9c3170ef7c9ade5d979987ae395cf00..HEAD:/src/bindings/java/org/simgrid/NativeLib.java diff --git a/src/bindings/java/org/simgrid/NativeLib.java b/src/bindings/java/org/simgrid/NativeLib.java deleted file mode 100644 index 81ffd742df..0000000000 --- a/src/bindings/java/org/simgrid/NativeLib.java +++ /dev/null @@ -1,176 +0,0 @@ -/* Copyright (c) 2014-2017. The SimGrid Team. All rights reserved. */ - -/* This program is free software; you can redistribute it and/or modify it - * under the terms of the license (GNU LGPL) which comes with this package. */ - -package org.simgrid; - -import java.io.FileOutputStream; -import java.io.InputStream; -import java.io.IOException; -import java.io.OutputStream; -import java.io.File; -import java.nio.file.Files; -import java.nio.file.Path; - -/** Helper class loading the native functions of SimGrid that we use for downcalls - * - * Almost all org.simgrid.msg.* classes contain a static bloc (thus executed when the class is loaded) - * containing a call to this. - */ -public final class NativeLib { - private static boolean isNativeInited = false; - private static Path tempDir = null; // where the embeeded libraries are unpacked before loading them - - /** A static-only "class" don't need no constructor */ - private NativeLib() { - throw new IllegalAccessError("Utility class"); - } - - /** Hidden debug main() function - * - * It is not the Main-Class defined in src/bindings/java/MANIFEST.in (org.simgrid.msg.Msg is), - * so it won't get executed by default. But that's helpful to debug linkage errors, if you - * know that it exists. It's used by cmake during the configure, to inform the user. - */ - public static void main(String[] args) { - System.out.println("This jarfile searches the native code under: " +getPath()); - } - - /** Main function loading all the native classes that we need */ - public static void nativeInit() { - if (isNativeInited) - return; - - if (System.getProperty("os.name").toLowerCase().startsWith("win")) - NativeLib.nativeInit("winpthread-1"); - - NativeLib.nativeInit("simgrid-java"); - isNativeInited = true; - } - - /** Helper function trying to load one requested library */ - public static void nativeInit(String name) { - Throwable cause = null; - try { - /* Prefer the version of the library bundled into the jar file and use it */ - if (loadLibAsStream(name)) - return; - } catch (UnsatisfiedLinkError|SecurityException|IOException e) { - cause = e; - } - - /* If not found, try to see if we can find a version on disk */ - try { - System.loadLibrary(name); - return; - } catch (UnsatisfiedLinkError systemException) { /* don't care */ } - - System.err.println("\nCannot load the bindings to the "+name+" library in path "+getPath()+" and no usable SimGrid installation found on disk."); - if (cause != null) { - if (cause.getMessage().matches(".*libcgraph.so.*")) - System.err.println("HINT: Try to install the libcgraph package (sudo apt-get install libcgraph)."); - else if (cause.getMessage().matches(".*libboost_context.so.*")) - System.err.println("HINT: Try to install the boost-context package (sudo apt-get install libboost-context-dev)."); - else - System.err.println("Try to install the missing dependencies, if any. Read carefully the following error message."); - - System.err.println(); - cause.printStackTrace(); - } else { - System.err.println("This jar file does not seem to fit your system, and no usable SimGrid installation found on disk."); - } - System.exit(1); - } - - /** Try to extract the library from the jarfile before loading it */ - private static boolean loadLibAsStream (String name) throws IOException, UnsatisfiedLinkError { - String path = NativeLib.getPath(); - - // We must write the lib onto the disk before loading it -- stupid operating systems - if (tempDir == null) { - tempDir = Files.createTempDirectory("simgrid-java-"); - // don't leak the files on disk, but remove it on JVM shutdown - Runtime.getRuntime().addShutdownHook(new Thread(new FileCleaner(tempDir.toFile()))); - } - - /* For each possible filename of the given library on all possible OSes, try it */ - for (String filename : new String[] - { name, - "lib"+name+".so", /* linux */ - name+".dll", "lib"+name+".dll", /* windows (pure and mingw) */ - "lib"+name+".dylib" /* mac osx */}) { - - File fileOut = new File(tempDir.toFile().getAbsolutePath() + File.separator + filename); - try ( // Try-with-resources. These stream will be autoclosed when needed. - InputStream in = NativeLib.class.getClassLoader().getResourceAsStream(path+filename); - OutputStream out = new FileOutputStream(fileOut); - ) { - if (in == null) - continue; // Try the next name: no such file found - - /* copy the library in position */ - byte[] buffer = new byte[4096]; - int bytesRead; - while ((bytesRead = in.read(buffer)) != -1) // Read until EOF - out.write(buffer, 0, bytesRead); - - out.close(); // Windows cannot open it twice, so close it first. Shame. - - /* load that shit */ - System.load(fileOut.getAbsolutePath()); - - /* It loaded! we're good */ - return true; - - } - } - - /* No suitable name found */ - return false; - } - - /** Find where to search for the library in the jar -- keep it aligned with where cmake puts it! */ - private static String getPath() { - // Inspiration: https://github.com/xerial/snappy-java/blob/develop/src/main/java/org/xerial/snappy/OSInfo.java - String prefix = "NATIVE"; - String os = System.getProperty("os.name"); - String arch = System.getProperty("os.arch"); - - if (arch.matches("^i[3-6]86$")) - arch = "x86"; - else if ("x86_64".equalsIgnoreCase(arch) || "AMD64".equalsIgnoreCase(arch)) - arch = "amd64"; - - if (os.toLowerCase().startsWith("win")){ - os = "Windows"; - } else if (os.contains("OS X")) - os = "Darwin"; - - os = os.replace(' ', '_'); - arch = arch.replace(' ', '_'); - - return prefix + "/" + os + "/" + arch + "/"; - } - - /** A hackish mechanism used to remove the file containing our library when the JVM shuts down */ - private static class FileCleaner implements Runnable { - private File dir; - public FileCleaner(File dir) { - this.dir = dir; - } - @Override - public void run() { - try { - for (File f : dir.listFiles()) - if (! f.delete() && !f.getAbsolutePath().contains("appveyor")) // Be silent on AppVeyor to not break the tests. Ugly trick :) - System.out.println("Unable to clean temporary file "+f.getAbsolutePath()+" during shutdown."); - if (! dir.delete() && !dir.getAbsolutePath().contains("appveyor") ) - System.out.println("Unable to clean temporary file "+dir.getAbsolutePath()+" during shutdown."); - } catch(Exception e) { - System.out.println("Unable to clean temporary file "+dir.getAbsolutePath()+" during shutdown: "+e.getCause()); - e.printStackTrace(); - } - } - } -}