X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/64acda35b83bda6e4b2f7ea9268b0246c9e909c5..77d095374d3f966ce0f54f3837116c73bc3e52e4:/src/bindings/java/org/simgrid/NativeLib.java diff --git a/src/bindings/java/org/simgrid/NativeLib.java b/src/bindings/java/org/simgrid/NativeLib.java index cdeb4b6bd2..7c08bc267b 100644 --- a/src/bindings/java/org/simgrid/NativeLib.java +++ b/src/bindings/java/org/simgrid/NativeLib.java @@ -10,23 +10,62 @@ import java.io.FileOutputStream; 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(' ', '_'); @@ -34,17 +73,8 @@ public final class NativeLib { return prefix + "/" + os + "/" + arch + "/"; } - public static void nativeInit(String name) { - try { - /* prefer the version on disk, if existing */ - System.loadLibrary(name); - } catch (UnsatisfiedLinkError e) { - /* If not found, unpack the one bundled into the jar file and use it */ - loadLib(name); - } - } - - private static void loadLib (String name) { + static Path tempDir = null; + private static void loadLib (String name) throws SimGridLibNotFoundException { String Path = NativeLib.getPath(); String filename=name; @@ -53,31 +83,33 @@ public final class NativeLib { 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 RuntimeException("Cannot find library "+name+" in path "+Path+". Sorry, but this jar does not seem to be usable on your machine."); + 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 @@ -87,26 +119,26 @@ public final class NativeLib { in.close(); out.close(); System.load(fileOut.getAbsolutePath()); - } catch (Exception e) { - System.err.println("Cannot load the bindings to the "+name+" library in path "+getPath()); + System.err.println("Error while extracting the native library from the jar: "); e.printStackTrace(); - System.err.println("This jar file does not seem to fit your system, sorry"); - System.exit(1); + 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(); } } @@ -114,6 +146,17 @@ public final class NativeLib { public static void main(String[] args) { - System.out.println("This java library will try to load the native code under the following name:" +getPath()); + System.out.println("This jarfile searches the native code under: " +getPath()); } } + +class SimGridLibNotFoundException extends Exception { + private static final long serialVersionUID = 1L; + public SimGridLibNotFoundException(String msg) { + super(msg); + } + + public SimGridLibNotFoundException(String msg, Exception e) { + super(msg,e); + } +} \ No newline at end of file