Function read_lock_stack

dbug/dbug.c:413–420

Lock the stack debugging settings. Only the shared (global) settings are locked if necessary, per thread settings are local and safe to use. This lock is re entrant. @sa unlock_stack */

  @sa unlock_stack
*/
static void read_lock_stack(CODE_STATE *cs)
{
  if (cs->stack == &init_settings)
  {
    if (++(cs->m_read_lock_count) == 1)
      rw_rdlock(&THR_LOCK_init_settings);
  }
}

/**
  Unlock the stack debugging settings.