- /* Statically load the library which contains all native functions used in here */
- static private boolean isNativeInited = false;
- public static void nativeInit() {
- if (isNativeInited)
- return;
- try {
- /* prefer the version on disk, if existing */
- System.loadLibrary("SG_java");
- } catch (UnsatisfiedLinkError e) {
- /* If not found, unpack the one bundled into the jar file and use it */
- loadLib("simgrid");
- loadLib("SG_java");
- }
- isNativeInited = true;
- }
- static {
- nativeInit();
- }
- private static void loadLib (String name) {
- String Os = System.getProperty("os.name");
- String Arch = System.getProperty("os.arch");
- // Some OS/Arch may be different between Java and Cmake,
- // which generated the path
- if (Os.toLowerCase().startsWith("win"))
- Os = "Windows";
- else if (Os.contains("OS X"))
- Os = "Darwin";
- if (Arch.equalsIgnoreCase("x86"))
- Arch = "i386";
- else if (Arch.equalsIgnoreCase("x86_64"))
- Arch = "amd64";
- String Path = "NATIVE/" + Os + "/" + Arch + "/";
-
- String filename=name;
- InputStream in = Msg.class.getClassLoader().getResourceAsStream(Path+filename);
-
- if (in == null) {
- filename = "lib"+name+".so";
- in = Msg.class.getClassLoader().getResourceAsStream(Path+filename);
- }
- if (in == null) {
- filename = name+".dll";
- in = Msg.class.getClassLoader().getResourceAsStream(Path+filename);
- }
- if (in == null) {
- filename = "lib"+name+".dll";
- in = Msg.class.getClassLoader().getResourceAsStream(Path+filename);
- }
- if (in == null) {
- filename = "lib"+name+".dylib";
- in = Msg.class.getClassLoader().getResourceAsStream(Path+filename);
- }
- if (in == null) {
- throw new RuntimeException("Cannot find library "+name+" in path "+Path+". Sorry, but this jar does not seem to be usable on your machine.");
- }
-// Caching the file on disk: desactivated because it could fool the users
-// if (new File(filename).isFile()) {
-// // file was already unpacked -- use it directly
-// System.load(new File(".").getAbsolutePath()+File.separator+filename);
-// return;
-// }
- try {
- // We must write the lib onto the disk before loading it -- stupid operating systems
- File fileOut = new File(filename);
-// if (!new File(".").canWrite()) {
-// System.out.println("Cannot write in ."+File.separator+filename+"; unpacking the library into a temporary file instead");
- fileOut = File.createTempFile("simgrid-", ".tmp");
- // don't leak the file on disk, but remove it on JVM shutdown
- Runtime.getRuntime().addShutdownHook(new Thread(new FileCleaner(fileOut.getAbsolutePath())));
-// }
-// System.out.println("Unpacking SimGrid native library to " + fileOut.getAbsolutePath());
- OutputStream out = new FileOutputStream(fileOut);
-
- /* copy the library in position */
- byte[] buffer = new byte[4096];
- int bytes_read;
- while ((bytes_read = in.read(buffer)) != -1) // Read until EOF
- out.write(buffer, 0, bytes_read);
-
- /* close all file descriptors, and load that shit */
- in.close();
- out.close();
- System.load(fileOut.getAbsolutePath());
- } catch (Exception e) {
- System.err.println("Cannot load the bindings to the simgrid library: ");
- e.printStackTrace();
- System.err.println("This jar file does not seem to fit your system, sorry");
- System.exit(1);
- }
- }
- /* A hackish mechanism used to remove the file containing our library when the JVM shuts down */
- private static class FileCleaner implements Runnable {
- private String target;
- public FileCleaner(String name) {
- target = name;
- }
- public void run() {
- try {
- new File(target).delete();
- } catch(Exception e) {
- System.out.println("Unable to clean temporary file "+target+" during shutdown.");
- e.printStackTrace();
- }
- }
- }