src/library/parallel/R/zzz.R

#  File src/library/parallel/R/zzz.R
#  Part of the R package, https://www.R-project.org
#
#  Copyright (C) 1995-2014 The R Core Team
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  A copy of the GNU General Public License is available at
#  https://www.R-project.org/Licenses/

.noGenerics <- TRUE

if (.Platform$OS.type == "windows")
    utils::globalVariables(c("mc_pids", "clean_pids"), add = TRUE)

## dummy, just so we can register a finalizer
.fin.env <- new.env()

.onLoad <- function(libname, pkgname)
{
    initDefaultClusterOptions(libname)
    cores <- getOption("mc.cores", NULL)
    if(is.null(cores) && !is.na(nc <- as.integer(Sys.getenv("MC_CORES"))))
        options("mc.cores" = nc)
    if(.Platform$OS.type == "unix") reg.finalizer(.fin.env, clean_pids, TRUE)
}

.onUnload <-
function(libpath)
    library.dynam.unload("parallel", libpath)