Nothing
## 'parallelly' is currently importing the following non-exported functions:
## * makeClusterPSOCK():
## - parallel:::sendCall()
## - parallel:::recvResult()
## * isForkedChild():
## - parallel:::isChild()
##
## This function is also used by 'future', which in addition imports:
## * cluster futures:
## - parallel:::defaultCluster() ## non-critical / not really needed /
## ## can be dropped in R (>= 3.5.0)
## - parallel:::sendCall() ## future::run()
## - parallel:::recvResult() ## future::value()
## * multicore futures:
## - parallel:::selectChildren() ## future::resolved()
## - parallel:::rmChild() ## future::value()
## As well as the following ones (because they are not exported on MS Windows):
## * multicore futures:
## - parallel::mcparallel() ## future::run()
## - parallel::mccollect() ## future::value()
importParallel <- local({
ns <- NULL
cache <- list()
function(name = NULL) {
res <- cache[[name]]
if (is.null(res)) {
ns <<- getNamespace("parallel")
## SPECIAL: parallel::getDefaultCluster() was added in R devel r73712
## (to become 3.5.0) on 2017-11-11. The fallback in R (< 3.5.0) is
## to use parallel:::defaultCluster(). /HB 2017-11-11
if (name == "getDefaultCluster") {
if (!exists(name, mode = "function", envir = ns, inherits = FALSE)) {
name <- "defaultCluster"
}
}
if (!exists(name, mode = "function", envir = ns, inherits = FALSE)) {
## covr: skip=3
msg <- sprintf("parallel:::%s() is not available in R %s on this system (%s)", name, getRversion(), sQuote(.Platform$OS.type))
mdebug(msg)
stop(msg, call. = FALSE)
}
res <- get(name, mode = "function", envir = ns, inherits = FALSE)
if (name %in% c("mccollect", "selectChildren") &&
getRversion() >= "3.5.0" && getRversion() <= "3.5.1") {
## Suppress warnings produced by parallel::mccollect() and
## parallel::selectChildren() in R 3.5.0 and and R 3.5.1
## (https://github.com/HenrikBengtsson/future/issues/218), e.g.
##
## "Warning in selectChildren(pids[!fin], -1) :
## cannot wait for child 32193 as it does not exist"
##
res_org <- res
res <- function(...) suppressWarnings(res_org(...))
}
cache[[name]] <<- res
}
res
}
})
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