Are these cost char [] static??

I found this in our code base today, I wonder is this entirely safe or are we depending on the bahavior of the compiler here that these strings are static, and thus around after the function returns?

Code:

//-----------------------------------------------------------------------------
const char* ProcessModule::DetermineLogFilePrefix()
{
  if (this->Options)
    {
    switch (this->Options->GetProcessType())
      {
    case Options::CLIENT:
      return NULL; // don't need a log for client.
    case Options::SERVER:
      return "ServerNodeLog";
    case Options::RENDER_SERVER:
      return "RenderServerNodeLog";
    case Options::DATA_SERVER:
      return "DataServerNodeLog";
      }
    }
  return "NodeLog";
}

Yes, that's safe. Literal strings aren't deleted when they go out of scope. I believe they're stored in a different part of memory than regular variables (not the stack or heap).