/*
* JNI interface to C code for MSG.
*
- * Copyright 2006,2007,2010,2011 The SimGrid Team.
+ * Copyright 2006-2012 The SimGrid Team.
* All right reserved.
*
* This program is free software; you can redistribute
package org.simgrid.msg;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.File;
+
+
public final class Msg {
/* Statically load the library which contains all native functions used in here */
static {
try {
- System.loadLibrary("libSG_java");
- } catch(UnsatisfiedLinkError e) {
+ /* 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");
+ }
+ }
+ private static void loadLib (String name) {
+ String Path = "NATIVE/"+System.getProperty("os.name")+"/"+System.getProperty("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+".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(
- "Please check your LD_LIBRARY_PATH, or copy the simgrid and SG_java libraries to the current directory");
+ 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();
+ }
+ }
}
- /** Everything is right. Keep on going the way ! */
- public static final int SUCCESS = 0;
-
- /** Something must be not perfectly clean (but I may be paranoid freak...) */
- public static final int WARNING = 1;
-
- /** There has been a problem during your task transfer.
- * Either the network is down or the remote host has been shutdown */
- public static final int TRANSFERT_FAILURE = 2;
-
- /** System shutdown.
- * The host on which you are running has just been rebooted.
- * Free your data structures and return now ! */
- public static final int HOST_FAILURE = 3;
-
- /** Canceled task. This task has been canceled by somebody ! */
- public static final int TASK_CANCELLLED = 4;
-
- /** You've done something wrong. You'd better look at it... */
- public static final int FATAL_ERROR = 5;
-
/** Retrieve the simulation time
* @return
*/
public final static native double getClock();
+ /**
+ * Issue a debug logging message.
+ * @param s message to log.
+ */
+ public final static native void debug(String s);
+ /**
+ * Issue an verbose logging message.
+ * @param s message to log.
+ */
+ public final static native void verb(String s);
- /** Issue an information logging message
+ /** Issue an information logging message
* @param s
*/
public final static native void info(String s);
+ /**
+ * Issue an warning logging message.
+ * @param s message to log.
+ */
+ public final static native void warn(String s);
+ /**
+ * Issue an error logging message.
+ * @param s message to log.
+ */
+ public final static native void error(String s);
+ /**
+ * Issue an critical logging message.
+ * @param s message to log.
+ */
+ public final static native void critical(String s);
/*********************************************************************************
* Deployment and initialization related functions *
*/
public final static native void run() ;
- /**
- * Cleanup the MSG simulation.
- *
- * This function is only useful if you want to chain the simulations within
- * the same environment. But actually, it's not sure at all that cleaning the
- * JVM is faster than restarting a new one, so it's probable that using this
- * function is not a brilliant idea. Do so at own risk.
- *
- * @see MSG_clean
- */
- public final static native void clean();
-
+ /** This function is useless nowadays, just stop calling it. */
+ @Deprecated
+ public final static void clean(){}
/**
* The native implemented method to create the environment of the simulation.
