Here's a better example than "atexit" (which isn't guaranteed to work, since the VM may not be fully functional by the time the exit hooks are run:

import com.sun.jna.*;

public class CallbackTest {

public interface CLibrary extends Library { int SIGUSR1 = 30; interface sig_t extends Callback { void invoke(int signal); } sig_t signal(int signal, sig_t func); int raise(int signal); }

public static void main(String[] args) { CLibrary lib = (CLibrary)Native.loadLibrary("c", CLibrary.class); CLibrary.sig_t fn = new CLibrary.sig_t() { public void invoke(int signal) { System.out.println("received signal " + signal); System.exit(0); } }; CLibrary.sig_t old_handler = lib.signal(CLibrary.SIGUSR1, fn);

lib.raise(CLibrary.SIGUSR1); while (true) { try { Thread.sleep(10); } catch(Exception e) { } } } }

On Jun 15, 2009, at 9:35 PM, bao bao wrote: