jacobbien / cvxfromr

An R package for calling CVX from Matlab

CVXfromR

This is an R package for calling CVX from Matlab. For more information about this package and how to use it, see here.

cvxfromr's Issues

Temporary File Clash Possible when running in Parallel

From the documentation of base::tempfile:

R processes forked by functions such as 'mclapply' in package
'parallel' (or 'multicore') share a per-session temporary
directory.  Further, the 'guaranteed not to be currently in use'
applies only at the time of asking, and two children could ask
simultaneously.  This is circumvented by ensuring that 'tempfile'
calls in different children try different names.

Therefore, the only way I know to make this package safe for parallel users is to supply an additional string to the tempfile call that will be unique in different children processes.

I've implemented this by adding a new function parameter unique.string (see pull request #2). In this way, a call to CallCVX can pass in an extra string that is unique to each child to prevent a child from reading / writing / deleting temporary files from other children.