import java.io.InputStream;
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");
+
+ try {
+ NativeLib.nativeInit("boost_context");
+ } catch (Exception e) {/* Dont care */}
+ 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 (SimGridLibNotFoundException e) {
+ /* If not found, try to see if we can find a version on disk */
+ try {
+ System.loadLibrary(name);
+ } catch (UnsatisfiedLinkError e2) {
+ if (! name.equals("boost_context")) {
+ 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);
+ }
+ }
+ }
+ }
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);
- }
- }
- }
-
+ static Path tempDir = null;
private static void loadLib (String name) throws SimGridLibNotFoundException {
String Path = NativeLib.getPath();
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.");
}
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) {
+ System.err.println("Error while extracting the native library from the jar: ");
+ e.printStackTrace();
throw new SimGridLibNotFoundException("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;
}
public void run() {
try {
- new File(target).delete();
+ for (File f : dir.listFiles())
+ f.delete();
+ dir.delete();
} catch(Exception e) {
- System.out.println("Unable to clean temporary file "+target+" during shutdown.");
+ System.out.println("Unable to clean temporary file "+dir.getAbsolutePath()+" during shutdown.");
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());
}
}
