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("x86_64"))
25 else if (arch.equalsIgnoreCase("AMD64"))
28 if (os.toLowerCase().startsWith("win")){
30 } else if (os.contains("OS X"))
33 os = os.replace(' ', '_');
34 arch = arch.replace(' ', '_');
36 return prefix + "/" + os + "/" + arch + "/";
38 public static void nativeInit(String name) {
40 /* Prefer the version of the library bundled into the jar file and use it */
42 } catch (SimGridLibNotFoundException e) {
43 /* If not found, try to see if we can find a version on disk */
45 System.loadLibrary(name);
46 } catch (UnsatisfiedLinkError e2) {
47 System.err.println("Cannot load the bindings to the "+name+" library in path "+getPath());
49 System.err.println("This jar file does not seem to fit your system, and I cannot find an installation of SimGrid.");
55 private static void loadLib (String name) throws SimGridLibNotFoundException {
56 String Path = NativeLib.getPath();
59 InputStream in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
62 filename = "lib"+name+".so";
63 in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
66 filename = name+".dll";
67 in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
70 filename = "lib"+name+".dll";
71 in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
74 filename = "lib"+name+".dylib";
75 in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
78 throw new SimGridLibNotFoundException("Cannot find library "+name+" in path "+Path+". Sorry, but this jar does not seem to be usable on your machine.");
81 // We must write the lib onto the disk before loading it -- stupid operating systems
82 File fileOut = new File(filename);
83 fileOut = File.createTempFile(name+"-", ".tmp");
84 // don't leak the file on disk, but remove it on JVM shutdown
85 Runtime.getRuntime().addShutdownHook(new Thread(new FileCleaner(fileOut.getAbsolutePath())));
86 OutputStream out = new FileOutputStream(fileOut);
88 /* copy the library in position */
89 byte[] buffer = new byte[4096];
91 while ((bytes_read = in.read(buffer)) != -1) // Read until EOF
92 out.write(buffer, 0, bytes_read);
94 /* close all file descriptors, and load that shit */
97 System.load(fileOut.getAbsolutePath());
98 } catch (Exception e) {
99 System.err.println("Error while extracting the native library from the jar: ");
101 throw new SimGridLibNotFoundException("Cannot load the bindings to the "+name+" library in path "+getPath(), e);
105 /* A hackish mechanism used to remove the file containing our library when the JVM shuts down */
106 private static class FileCleaner implements Runnable {
107 private String target;
108 public FileCleaner(String name) {
113 new File(target).delete();
114 } catch(Exception e) {
115 System.out.println("Unable to clean temporary file "+target+" during shutdown.");
122 public static void main(String[] args) {
123 System.out.println("This jarfile searches the native code under: " +getPath());
127 class SimGridLibNotFoundException extends Exception {
128 private static final long serialVersionUID = 1L;
129 public SimGridLibNotFoundException(String msg) {
133 public SimGridLibNotFoundException(String msg, Exception e) {