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;
public final class NativeLib {
+ /* Statically load the library which contains all native functions used in here */
+ static private boolean isNativeInited = false;
+ public static void nativeInit() {
+ if (isNativeInited)
+ return;
+
+ if (System.getProperty("os.name").toLowerCase().startsWith("win"))
+ NativeLib.nativeInit("winpthread-1");
+
+ NativeLib.nativeInit("simgrid");
+ NativeLib.nativeInit("simgrid-java");
+ isNativeInited = true;
+ }
+
+ public static void nativeInit(String name) {
+ try {
+ /* Prefer the version of the library bundled into the jar file and use it */
+ loadLib(name);
+ } catch (LinkageException embeededException) {
+ /* If not found, try to see if we can find a version on disk */
+ try {
+ System.loadLibrary(name);
+ } catch (UnsatisfiedLinkError systemException) {
+ if (! name.equals("boost_context")) { // Ignore when we cannot load boost_context
+
+ System.err.println("\nCannot load the bindings to the "+name+" library in path "+getPath());
+ Throwable cause = embeededException.getCause();
+ if (cause instanceof java.lang.UnsatisfiedLinkError) {
+ 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, which name should appear above.");
+ } else {
+ System.err.println("This jar file does not seem to fit your system, and no usable SimGrid installation found on disk.");
+ }
+ System.err.println();
+ cause.printStackTrace();
+ System.exit(1);
+ }
+ }
+ }
+ }
public 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 (arch.equalsIgnoreCase("amd64"))
- arch = "x86_64";
+ else if (arch.equalsIgnoreCase("x86_64"))
+ arch = "amd64";
+ else if (arch.equalsIgnoreCase("AMD64"))
+ arch = "amd64";
if (os.toLowerCase().startsWith("win")){
os = "Windows";
- arch = "x86";
- }else if (os.contains("OS X"))
+ } else if (os.contains("OS X"))
os = "Darwin";
os = os.replace(' ', '_');
return prefix + "/" + os + "/" + arch + "/";
}
- public static void nativeInit(String name) {
- try {
- /* Prefer the version of the library bundled into the jar file and use it */
- loadLib(name);
- } catch (SimGridLibNotFoundException e) {
- /* If not found, try to see if we can find a version on disk */
- try {
- System.loadLibrary(name);
- } catch (UnsatisfiedLinkError e2) {
- System.err.println("Cannot load the bindings to the "+name+" library in path "+getPath());
- e.printStackTrace();
- System.err.println("This jar file does not seem to fit your system, and I cannot find an installation of SimGrid.");
- System.exit(1);
- }
- }
- }
-
- private static void loadLib (String name) throws SimGridLibNotFoundException {
+ static Path tempDir = null;
+ private static void loadLib (String name) throws LinkageException {
String Path = NativeLib.getPath();
String filename=name;
if (in == null) {
filename = "lib"+name+".so";
in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
- }
+ }
if (in == null) {
filename = name+".dll";
in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
- }
+ }
if (in == null) {
filename = "lib"+name+".dll";
in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
- }
+ }
if (in == null) {
filename = "lib"+name+".dylib";
in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
- }
+ }
if (in == null) {
- throw new SimGridLibNotFoundException("Cannot find library "+name+" in path "+Path+". Sorry, but this jar does not seem to be usable on your machine.");
+ throw new LinkageException("Cannot find library "+name+" in path "+Path+". Sorry, but this jar does not seem to be usable on your machine.");
}
try {
// We must write the lib onto the disk before loading it -- stupid operating systems
- File fileOut = new File(filename);
- fileOut = File.createTempFile(name+"-", ".tmp");
- // don't leak the file on disk, but remove it on JVM shutdown
- Runtime.getRuntime().addShutdownHook(new Thread(new FileCleaner(fileOut.getAbsolutePath())));
- OutputStream out = new FileOutputStream(fileOut);
+ 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())));
+ }
+ File fileOut = new File(tempDir.toFile().getAbsolutePath() + File.separator + filename);
/* copy the library in position */
+ OutputStream out = new FileOutputStream(fileOut);
byte[] buffer = new byte[4096];
int bytes_read;
while ((bytes_read = in.read(buffer)) != -1) // Read until EOF
in.close();
out.close();
System.load(fileOut.getAbsolutePath());
-
- } catch (Exception e) {
- throw new SimGridLibNotFoundException("Cannot load the bindings to the "+name+" library in path "+getPath(), e);
+ } catch (SecurityException|UnsatisfiedLinkError|IOException e) {
+ throw new LinkageException("Cannot load the bindings to the "+name+" library in path "+getPath(), e);
}
}
/* 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;
+ private File dir;
+ public FileCleaner(File dir) {
+ this.dir = dir;
}
+ @Override
public void run() {
try {
- new File(target).delete();
+ for (File f : dir.listFiles())
+ if (! f.delete() )
+ System.err.println("Unable to clean temporary file "+f.getAbsolutePath()+" during shutdown.");
+ if (! dir.delete() )
+ System.err.println("Unable to clean temporary file "+dir.getAbsolutePath()+" during shutdown.");
} catch(Exception e) {
- System.out.println("Unable to clean temporary file "+target+" during shutdown.");
+ System.err.println("Unable to clean temporary file "+dir.getAbsolutePath()+" during shutdown: "+e.getCause());
e.printStackTrace();
}
}
public static void main(String[] args) {
- if (args.length >= 1 && args[0].equals("--quiet"))
- /* be careful, this execution path is used in tools/cmake/scripts/java_bundle.sh to determine where to put the libs */
- System.out.println(getPath());
- else
- System.out.println("This java library will try to load the native code under the following name:\n" +getPath());
+ System.out.println("This jarfile searches the native code under: " +getPath());
}
}
-class SimGridLibNotFoundException extends Exception {
+class LinkageException extends Exception {
private static final long serialVersionUID = 1L;
- public SimGridLibNotFoundException(String msg) {
+ public LinkageException(String msg) {
super(msg);
}
- public SimGridLibNotFoundException(String msg, Exception e) {
+ public LinkageException(String msg, Throwable e) {
super(msg,e);
}
-}
\ No newline at end of file
+}
