Horizon » Horizon Simulation Framework

//

// Load the native library when any method from it is referenced.

//

// Note: check exceptions before. gcc shared libs must NOT be linked with "-static",

// because throw/catch won't work (program exits with "terminate called...").

// See http://www.gnu.org/software/gcc/faq.html#dso

// As a safeguard against incorrectly built libs, we test exceptions first thing

// after loading the library.

// --Andras

//

%{

#include "exception.h"

static void testExceptionHandling() {

    try {

        throw opp_runtime_error("if you see this exception, omnetpp's native library (\"opplibs\") was built incorrectly");

    } catch (std::exception&) { /*OK!*/ }

}

%}

void testExceptionHandling();

%pragma(java) jniclassimports=%{

import org.eclipse.core.runtime.Platform;

import org.eclipse.jface.dialogs.MessageDialog;

import org.eclipse.swt.widgets.Display;

%}

%pragma(java) jniclasscode=%{

  static {

      if (Platform.getOS().equals(Platform.OS_WIN32)) {

          try {

              // mingwm10.dll is a dependency of opplibs.dll. We need to load it

              // explicitly, because for some reason it is not found otherwise

              // when placed next to opplibs.dll. --Andras

              System.loadLibrary("mingwm10");

          }

          catch (UnsatisfiedLinkError e) {

              System.err.println("Warning: could not load mingwm10.dll: " + e.getClass().getName() + ": " + e.toString());

          }

      }

      try {

          System.loadLibrary("opplibs");

      }

      catch (UnsatisfiedLinkError e) {

          displayError(e);

          throw e;

      }

      testExceptionHandling();

      testThreads();

  }

  private static void testThreads() {

      // test that exception handling is thread-safe in our shared lib (gcc -mthreads)

      for (int i=0; i<3; i++) {

          Thread t = new Thread() {

              @Override

              public void run() {

                  long start = System.currentTimeMillis();

                  while (System.currentTimeMillis() - start < 50)

                      testExceptionHandling();

              }

          };

          t.start();

      }

  }

  private static void displayError(final UnsatisfiedLinkError e) {

      runNowOrSyncInUIThread(new Runnable() {

          public void run() {

              MessageDialog.openError(null, "Fatal Error",

                      "FATAL: The OMNeT++ IDE native library failed to load, " +

                      "all OMNeT++-related functionality will be unaccessible.\n\n" +

                      "Details:\n\n" +

                      e.getClass().getSimpleName() + ": " + e.getMessage() + "\n\n" +

                      (Platform.getOS().equals(Platform.OS_LINUX) ?

                              "Try upgrading your Linux installation to a more recent version, " +

                              "or installing newer versions of libc and libstdc++." : "")

              );

          }

      });

  }

  private static void runNowOrSyncInUIThread(Runnable runnable) {

      if (Display.getCurrent() == null)

          Display.getDefault().syncExec(runnable);

      else

          runnable.run();

  }

%}