Method atomic_get_set()

Method atomic_get_set

mixed atomic_get_set(mapping|object map, mixed key, mixed val)
mixed atomic_get_set(array arr, int index, mixed val)

Description

Replace atomically the value for a key in a mapping or array.

Parameter map

Parameter arr

Mapping or array to alter.

Parameter key

Parameter index

Key or index to change the value for.

Parameter val

Value to change to. If value is UNDEFINED and map is a mapping this function function behaves exactly as m_delete(map, key).

Returns

Returns the previous value for key. If map is a mapping and there was no previous value UNDEFINED is returned.

If map is an object lfun::_m_replace() will be called in it.

See also

m_delete()