1 /* Copyright (c) 2014. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
9 import java.io.FileOutputStream;
10 import java.io.InputStream;
11 import java.io.OutputStream;
14 public final class NativeLib {
16 public static String getPath() {
17 String prefix = "NATIVE";
18 String os = System.getProperty("os.name");
19 String arch = System.getProperty("os.arch");
21 if (arch.matches("^i[3-6]86$"))
23 else if (arch.equalsIgnoreCase("amd64"))
26 if (os.toLowerCase().startsWith("win")){
29 }else if (os.contains("OS X"))
32 os = os.replace(' ', '_');
33 arch = arch.replace(' ', '_');
35 return prefix + "/" + os + "/" + arch + "/";
37 public static void nativeInit(String name) {
39 /* Prefer the version of the library bundled into the jar file and use it */
41 } catch (SimGridLibNotFoundException e) {
42 /* If not found, try to see if we can find a version on disk */
44 System.loadLibrary(name);
45 } catch (UnsatisfiedLinkError e2) {
46 System.err.println("Cannot load the bindings to the "+name+" library in path "+getPath());
48 System.err.println("This jar file does not seem to fit your system, and I cannot find an installation of SimGrid.");
54 private static void loadLib (String name) throws SimGridLibNotFoundException {
55 String Path = NativeLib.getPath();
58 InputStream in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
61 filename = "lib"+name+".so";
62 in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
65 filename = name+".dll";
66 in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
69 filename = "lib"+name+".dll";
70 in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
73 filename = "lib"+name+".dylib";
74 in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
77 throw new SimGridLibNotFoundException("Cannot find library "+name+" in path "+Path+". Sorry, but this jar does not seem to be usable on your machine.");
80 // We must write the lib onto the disk before loading it -- stupid operating systems
81 File fileOut = new File(filename);
82 fileOut = File.createTempFile(name+"-", ".tmp");
83 // don't leak the file on disk, but remove it on JVM shutdown
84 Runtime.getRuntime().addShutdownHook(new Thread(new FileCleaner(fileOut.getAbsolutePath())));
85 OutputStream out = new FileOutputStream(fileOut);
87 /* copy the library in position */
88 byte[] buffer = new byte[4096];
90 while ((bytes_read = in.read(buffer)) != -1) // Read until EOF
91 out.write(buffer, 0, bytes_read);
93 /* close all file descriptors, and load that shit */
96 System.load(fileOut.getAbsolutePath());
98 } catch (Exception e) {
99 throw new SimGridLibNotFoundException("Cannot load the bindings to the "+name+" library in path "+getPath(), e);
103 /* A hackish mechanism used to remove the file containing our library when the JVM shuts down */
104 private static class FileCleaner implements Runnable {
105 private String target;
106 public FileCleaner(String name) {
111 new File(target).delete();
112 } catch(Exception e) {
113 System.out.println("Unable to clean temporary file "+target+" during shutdown.");
120 public static void main(String[] args) {
121 if (args.length >= 1 && args[0].equals("--quiet"))
122 /* be careful, this execution path is used in buildtools/Cmake/Scripts/java_bundle.sh to determine where to put the libs */
123 System.out.println(getPath());
125 System.out.println("This java library will try to load the native code under the following name:\n" +getPath());
129 class SimGridLibNotFoundException extends Exception {
130 private static final long serialVersionUID = 1L;
131 public SimGridLibNotFoundException(String msg) {
135 public SimGridLibNotFoundException(String msg, Exception e) {