SWI-Prolog -- API-function PL_close_foreign

Documentation
- Reference manual
  - Foreign Language Interface
    - The Foreign Include File
      - Discarding Data
        
        PL_open_foreign_frame()
        
        PL_close_foreign_frame()
        
        PL_discard_foreign_frame()
        
        PL_rewind_foreign_frame()
- Packages

Availability:C-language interface function

void PL_close_foreign_frame(fid_t id)

Discard all term references created after the frame was opened. All other Prolog data is retained. This function is called by the kernel whenever a foreign function returns control back to Prolog.