mcfork in Rstudio

问题:

I seem to be unable to fork a new process in Rstudio using mcfork from parallel, though this works in a standard R console on linux / OS X. Is there an alternative workaround to forking a subprocess in Rstudio.

For example, consider this function:

library(parallel)
f <- function() {
    p <- parallel:::mcfork()
    if (inherits(p, "masterProcess")) {
      cat("I'm a child!")
      parallel:::mcexit()
    }
    cat("I'm the master\n")
}

In my standard R console I get the expected output:

I'm the master
> I'm a child!

But in Rstudio, I get:

I'm the master