!7

static new Flag taken;
static Android3 android;

p {
  android = makeAndroid3("A pre-spun VM.");
  taken.waitUntilUp();
}

static synchronized S answer(S s, L<S> history) {
  new Matches m;
  
  if (match3("please start program *", s, m)) {
    final S progID = formatSnippetID(unquote(m.m[0]));
    return startIt(progID, "");
  }
  
  if (match3("please start program * with arguments *", s, m)) {
    final S progID = formatSnippetID(unquote(m.m[0]));
    final S args = unquote(m.m[1]);
    return startIt(progID, args);
  }
  
  if (match3("are you free to start a program?", s))
    ret !taken.isUp() ? "Yes." : "No.";

  ret null;
}

static synchronized S startIt(final S progID, S args) {
  if (taken.isUp()) ret "Sorry, not free anymore.";
  
  free.raise();
  final S[] splitArgs = toStringArray(codeTokensOnly(javaTok(args))); // yeah this is bad...
  thread {
    callMain(hotwire(progID), splitArgs);
  }
  
  if (android != null) {
    android.dispose();
    android = null;
  }
  
  ret "OK.";
}