Displaying 2 results from an estimated 2 matches for "r_isforkedchild".
2017 Jan 25
2
parallel::mc*: Is it possible for a child process to know it is a fork?
When using multicore-forking of the parallel package, is it possible
for a child process to know that it is a fork? Something like:
parallel::mclapply(1:10, FUN = function(i) { test_if_running_in_a_fork() })
I'm looking into ways to protect against further parallel processes
(including threads), which not necessarily are created via the
parallel:mc* API, are being spawned off recursively.
2017 Jan 25
0
parallel::mc*: Is it possible for a child process to know it is a fork?
On Tue, Jan 24, 2017 at 7:06 PM, Henrik Bengtsson
<henrik.bengtsson at gmail.com> wrote:
> When using multicore-forking of the parallel package, is it possible
> for a child process to know that it is a fork?
R internally uses R_isForkedChild to prevent certain operations within
the fork. However I don't think this is exported anywhere. You could
do something like:
extern Rboolean R_isForkedChild;
SEXP is_forked(){
return ScalarLogical(R_isForkedChild);
}
But that won't be allowed on CRAN:
* checking compiled code ....