ff (version 4.0.4)

finalize: Call finalizer

Description

This calls the currently assigned finalizer, either via R's finalization mechanism or manually.

Usage

finalize(x, ...)
# S3 method for ff_pointer
finalize(x, ...)
# S3 method for ff
finalize(x, ...)
# S3 method for ffdf
finalize(x, ...)

Arguments

x

either an ff or ffdf object or an ff_pointer, see details

…

currently ignored

Value

returns whatever the called finalizer returns, for ffdf a list with the finalization returns of each physical component is returned.

Details

The finalize.ff_pointer method is called from R after it had been passed to reg.finalizer. It will set the finalizer name to NULL and call the finalizer.

The finalize generic can be called manually on ff or ffdf objects. It will call the finalizer but not touch the finalizer name.

For more details see finalizer

See Also

finalizer

Examples

# NOT RUN {
  x <- ff(1:12, pattern="./finalizerdemo")
  fnam <- filename(x)
  finalizer(x)
  is.open(x)
  file.exists(fnam)

  finalize(x)

  finalizer(x)
  is.open(x)
  file.exists(fnam)

  delete(x)
  finalizer(x)
  is.open(x)
  file.exists(fnam)

  rm(x)
  gc()
# }