.. efun:: int * query_limits()
  int * query_limits(int default)
  :include: <rtlimits.h>

  Return an array with the current runtime limits, resp. if :arg:`default` is true, the default runtime limits. The entries in the returned array are:

    int[:macro:`LIMIT_EVAL`]:    the max number of eval costs
    int[:macro:`LIMIT_ARRAY`]:   the max number of array entries
    int[:macro:`LIMIT_MAPPING_SIZE`]: the max number of mapping values
    int[:macro:`LIMIT_MAPPING_KEYS`]: the max number of mapping entries (:macro:`LIMIT_MAPPING` is an alias for :macro:`LIMIT_MAPPING_KEYS`)
    int[:macro:`LIMIT_BYTE`]:    the max number of bytes handled with one :efun:`read_bytes` or :efun:`write_bytes` call.
    int[:macro:`LIMIT_FILE`]:    the max number of bytes handled with one :efun:`read_file` or :efun:`write_file` call.
    int[:macro:`LIMIT_CALLOUTS`]: the number of callouts at one time.
    int[:macro:`LIMIT_COST`]:    how to account the current cost.
    int[:macro:`LIMIT_MEMROY`]:  the max. number of bytes which can be *additionally* allocated/used *per top-level execution thread*

  .. todo:: limit_memroy == typo?

  For all limits except :macro:`LIMIT_COST` a limit of '0' aka :macro:`LIMIT_UN`:macro:`LIMITED` means 'no limit'.

  The value for :macro:`LIMIT_COST` has these meanings:

    value > 0: the execution will cost ``min(value, actual cost)``.

    value = 0: if the current :macro:`LIMIT_EVAL` is larger than the calling :macro:`LIMIT_EVAL`, the evaluation will cost only 10; otherwise the full cost will be accounted.

    value < 0: ``(-value)%`` of the current evaluation cost will be accounted; ``-100`` means 'full cost'.

  .. usage::

    ::

      query_limits()  // returns the current runtime limits
      query_limits(1) // returns the default runtime limits

  :history 3.2.7 introduced:
  :history 3.2.9 changed: adds :macro:`LIMIT_CALLOUTS`
  :history 3.3.563 changed: adds :macro:`LIMIT_COST`
  :history 3.3.677 changed: adds :macro:`LIMIT_MAPPING_KEYS`, :macro:`LIMIT_MAPPING_SIZE`
  :history 3.5.0 changed: adds :macro:`LIMIT_MEMORY`

  .. seealso:: :efun:`limited`, :efun:`set_limits`