Method wait

kernel/oswrapper/vspace.cc:485–497

}

void Semaphore::wait() {
  _lock.lock();
  if (_value > 0) {
    _value--;
    _lock.unlock();
    return;
  }
  _waiting[_tail] = internals::vmem.current_process;
  _signals[_tail] = 0;
  next(_tail);
  _lock.unlock();
  internals::wait_signal();
}

bool Semaphore::start_wait(internals::ipc_signal_t sig) {
  _lock.lock();