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Add isFork() #18

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HenrikBengtsson opened this issue Oct 20, 2020 · 0 comments

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HenrikBengtsson commented Oct 20, 2020 •

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From futureverse/future#224 (comment), in a question on how to detect whether or not R runs in a forked process:

> parallel:::isChild()
[1] FALSE

> f <- parallel::mcparallel(parallel:::isChild())
> parallel::mccollect(f)
[[1]]
[1] TRUE

> cl <- parallel::makeForkCluster(1L)
> parallel::clusterEvalQ(cl, { parallel:::isChild() })
[[1]]
[1] TRUE

> cl <- parallel::makePSOCKcluster(1L)
> parallel::clusterEvalQ(cl, { parallel:::isChild() })
[[1]]
[1] FALSE

HenrikBengtsson added the enhancement label

HenrikBengtsson mentioned this issue

detect forking futureverse/future#224

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HenrikBengtsson changed the title ~~Export parallel:::isChild()~~ Add isForked()

HenrikBengtsson changed the title ~~Add isForked()~~ Add isFork()

HenrikBengtsson added this to the Next release milestone

HenrikBengtsson closed this as completed in

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