Method try_wait

kernel/oswrapper/vspace.cc:474–483

}

bool Semaphore::try_wait() {
  bool result = false;
  _lock.lock();
  if (_value > 0) {
    _value--;
    result = true;
  }
  _lock.unlock();
  return result;
}

void Semaphore::wait() {
  _lock.lock();