c('PL_acquire_stream')

Documentation
- Reference manual
  - Foreign Language Interface
    - Foreign access to Prolog IO streams
      - Get IO stream handles
        
        PL_get_stream()
        
        PL_get_stream_from_blob()
        
        PL_acquire_stream()
        
        PL_release_stream()
- Packages

Availability:C-language interface function

IOSTREAM * PL_acquire_stream(IOSTREAM *s)

Obtain ownership of s and return s. The application must call PL_release_stream() when done. Only one thread can own a stream and this call blocks if some other thread owns the stream. Note that PL_get_stream() acquires ownership. This function may be called multiple times by the same thread (recursive lock).