SWI-Prolog -- API-function PL_discard_foreign_frame

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_discard_foreign_frame(fid_t id)

Same as PL_close_foreign_frame(), but also undo all bindings made since the open and destroy all Prolog data.