Call finalizer
This calls the currently assigned finalizer, either via R's finalization mechanism or manually.
finalize(x, ...) ## S3 method for class 'ff_pointer' finalize(x, ...) ## S3 method for class 'ff' finalize(x, ...) ## S3 method for class 'ffdf' finalize(x, ...)
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
returns whatever the called finalizer returns, for ffdf a list with the finalization returns of each physical component is returned.
finalize.ff_pointer MUST NEVER be called manually - neither directly nor by calling the generic on an ff_pointer (could erroneously signal that there is no pending finalization lurking around)
Jens Oehlschlägel
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()
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