ACE Reactor quits on interrupted system call

Question

I have an ACE reactor that accepts socket connections and listens for the incoming data on those connections. The reactor runs in a dedicated thread. This is the thread's entry function:

int TcpServer::svc()
{
    LogDebug("The TCP server on %i is running", mLocalAddr.get_port_number());

    // The current thread will own the reactor. By default, a reactor is owned by
    // the creating thread. A reactor cannot run from not owning thread.
    if (mReactor.owner(ACE_Thread::self()) != 0)
    {
        LogThrow("Could not change the owner of the reactor");
    }

    if (mReactor.run_reactor_event_loop() != 0)
    {
        LogWarning("Reactor loop has quit with an error.");
    }

    return 0;
}

Once in a while run_reactor_event_loop exits with -1 and errno reports that the reason is "interrupted system call". How can I handle the situation? From what I know I have two options: call run_reactor_event_loop again or configure the interrupted call to be called again using sigaction and SA_RESTART.

1. Is it safe to call run_reactor_event_loop again?
2. What does ACE_Reactor::restart method do? It looks like it is supposed to restart the loop? Will it help?
3. How safe it to turn on SA_RESTART? Does it mean, for example, that ^C won't stop my application?
4. Are there any other ways to handle the situation?

Answer 1

Check how Reactor is constructed. ACE_Reactor::open() cal, takes "restart" parameter (default = false) that tells it to restart handle_events method automatically after interruption.