-/* Copyright (c) 2014-2019. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2014-2021. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
package org.simgrid;
-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;
/** Helper class loading the native functions of SimGrid that we use for downcalls
*
- * Almost all org.simgrid.msg.* classes contain a static bloc (thus executed when the class is loaded)
+ * Almost all org.simgrid.msg.* classes contain a static block (thus executed when the class is loaded)
* containing a call to this.
*/
public final class NativeLib {
+ private static final boolean WINDOWS_OS = System.getProperty("os.name").toLowerCase().startsWith("win");
private static boolean isNativeInited = false;
private static Path tempDir = null; // where the embeeded libraries are unpacked before loading them
public static void main(String[] args) {
System.out.println("This jarfile searches the native code under: " +getPath());
}
-
+
/** Main function loading all the native classes that we need */
public static void nativeInit() {
if (isNativeInited)
return;
- if (System.getProperty("os.name").toLowerCase().startsWith("win"))
+ if (WINDOWS_OS)
NativeLib.nativeInit("winpthread-1");
NativeLib.nativeInit("simgrid");
} catch (UnsatisfiedLinkError|SecurityException|IOException e) {
cause = e;
}
-
+
/* If not found, try to see if we can find a version on disk */
try {
System.loadLibrary(name);
return;
} catch (UnsatisfiedLinkError systemException) { /* don't care */ }
-
+
System.err.println("\nCannot load the bindings to the "+name+" library in path "+getPath()+" and no usable SimGrid installation found on disk.");
if (cause != null) {
if (cause.getMessage().contains("libcgraph.so"))
/** Try to extract the library from the jarfile before loading it */
private static boolean loadLibAsStream (String name) throws IOException, UnsatisfiedLinkError {
String path = NativeLib.getPath();
-
+
// We must write the lib onto the disk before loading it -- stupid operating systems
if (tempDir == null) {
+ final String tempPrefix = "simgrid-java-";
- if (System.getProperty("os.name").toLowerCase().startsWith("win")) {
+ if (WINDOWS_OS) {
// The cleanup at exit fails on Windows where it is impossible to delete files which are still in
// use. Try to remove stale temporary files from previous executions, and limit disk usage.
Path tmpdir = (new File(System.getProperty("java.io.tmpdir"))).toPath();
- Files.find(tmpdir, 1, (Path p, java.nio.file.attribute.BasicFileAttributes a) ->
- a.isDirectory() && !p.equals(tmpdir) &&
- p.getFileName().toString().startsWith("simgrid-java-"))
- .map(Path::toFile)
- .map(FileCleaner::new)
- .forEach(FileCleaner::run);
+ try (Stream<Path> paths = Files.find(tmpdir, 1,
+ (Path p, java.nio.file.attribute.BasicFileAttributes a) ->
+ a.isDirectory() && !p.equals(tmpdir) &&
+ p.getFileName().toString().startsWith(tempPrefix))) {
+ paths.map(Path::toFile)
+ .map(FileCleaner::new)
+ .forEach(FileCleaner::run);
+
+ }
}
- tempDir = Files.createTempDirectory("simgrid-java-");
+ tempDir = Files.createTempDirectory(tempPrefix);
// don't leak the files on disk, but remove it on JVM shutdown
Runtime.getRuntime().addShutdownHook(new Thread(new FileCleaner(tempDir.toFile())));
}
-
+
/* For each possible filename of the given library on all possible OSes, try it */
for (String filename : new String[]
{ name,
"lib"+name+".so", /* linux */
name+".dll", "lib"+name+".dll", /* windows (pure and mingw) */
"lib"+name+".dylib" /* macOS */}) {
-
+
File fileOut = new File(tempDir.toFile(), filename);
try ( // Try-with-resources. These stream will be autoclosed when needed.
InputStream in = NativeLib.class.getClassLoader().getResourceAsStream(path+filename);
}
}
}
-
+
/* No suitable name found */
return false;
}
return prefix + "/" + os + "/" + arch + "/";
}
-
+
/** A hackish mechanism used to remove the file containing our library when the JVM shuts down */
private static class FileCleaner implements Runnable {
private File dir;
