SWI-Prolog -- API-function PL_close

Documentation
- Reference manual
  - Foreign Language Interface
    - The Foreign Include File
      - Calling Prolog from C
        
        Initiating a query from C
        
        PL_open_query()
        
        PL_next_solution()
        
        PL_cut_query()
        
        PL_close_query()
        
        PL_current_query()
        
        PL_query_engine()
        
        PL_call_predicate()
        
        PL_call()
- Packages

Availability:C-language interface function

int PL_close_query(qid_t qid)

As PL_cut_query(), but all data and bindings created by the query are destroyed as if the query is called as \+ \+ Goal. This reduces the need for garbage collection, but also rewinds side effects such as setting global variables using b_setval/2. The return value PL_S_NOT_INNER is returned if qid is not the innermost query.