sttybuf & csdbg::sttybuf::discard ( ) const

virtual

Discard the data cached in the serial interface (in-kernel) buffers.

Returns

*this

Definition at line 355 of file sttybuf.cpp.

References csdbg::util::dbg_warn(), m_devnode, csdbg::streambuf::m_handle, and unlikely.

Referenced by config(), and flush().

{
  i32 retval;
  do {
    retval = tcflush(m_handle, TCIOFLUSH);
  }
  while ( unlikely(retval < 0 && errno == EINTR) );

#if CSDBG_DBG_LEVEL & CSDBG_DBGL_WARNING
  if ( unlikely(retval < 0) )
    util::dbg_warn(
      "failed to clear the buffers of serial interface '%s' (errno %d - %s)",
      m_devnode,
      errno,
      strerror(errno)
    );
#endif

  return const_cast<sttybuf&> (*this);
}

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