bettermc [v1.1.2]

Misc

• work around an issue in base R w.r.t. source references and lazy loading as discussed in https://r.789695.n4.nabble.com/memory-consumption-of-nested-un-serialize-of-sys-frames-tp4768465.html
• prepare for upcoming changes to Rinternals.h
  • do no longer assign to ATTRIB() and OBJECT()
  • do no longer depend on SEXPREC_ALIGN

bettermc [v1.1.1]

New Features

Windows Support

This package can now also be installed on Windows, where it offers a reduced set of features. Most notably, bettermc::mclapply() (just like parallel::mclapply()) falls back on serial execution, since forking is not available on Windows. Still, this allows code employing bettermc::mclapply(), which was originally developed for Linux or macOS, to be run on Windows.

Seeding

• restore the state of the random number generator (RNG) at the end of mclapply() to what it was before; this makes the RNG state of the parent process immune to changes to arguments such as mc.cores or mc.force.fork
• new argument mc.retry.fixed.seed to mclapply(): TRUE invokes FUN() for a particular element of X with the same fixed seed on every retry; default is FALSE

Misc

• the environment variable “BMC_RETRY” now indicates the current retry (“0” means first try, a value of “1” first retry, etc.)
• new argument mc.retry.silent to mclapply(): TRUE suppresses the messages indicating failures during intermediate retires; default is FALSE

Bug Fixes

• on retires, output, messages etc. might have been prefixed with the wrong index w.r.t. X
• on the first call of mclapply() in a session, the environment variable MC_CORES was not respected
• fix wrong length of affinity.list if mc.force.fork == TRUE && length(X) == 1
• fix tiny memory leaks reported by Valgrind in allocate_from_shm()
• fix invalid write reported by Valgrind in allocate_from_shm()
• mark memory returned by custom allocator in allocate_from_shm() for Valgrind as defined (cf. https://r.789695.n4.nabble.com/custom-allocators-Valgrind-and-uninitialized-memory-td4768304.html)
• fix test failure on macOS with a page size of more than 4 KiB

bettermc [v1.0.1]

• initial CRAN release