Open a named pipe having the specified pipeName, and start a thread to read messages and dispatch them to the callback specified at construction. Optionally specify attributes of the background processing thread. If attributes is not supplied, a default constructed ThreadAttributes object will be used. Return 0 on success, and a non‐zero value otherwise. In particular, return a non‐zero value if the pipe cannot be opened or if it is detected that another process is reading from the pipe. pipeName must be of the types const char *, char *, bsl::string, std::string, std::pmr::string (if supported), or bslstl::StringRef.