[R-pkg-devel] header file for "flockfile" function under windows

[Dirk Eddelbuettel]

On 20 February 2018 at 20:56, Carmen M. Livi wrote:
| I am using file-locking functions in C that can be found in the 
| <stdio.h> in Unix
| 
| extern void flockfile (FILE *__stream) __THROW;
| extern int ftrylockfile (FILE *__stream) __THROW __wur;
| extern void funlockfile (FILE *__stream) __THROW;
| 
| When submitting to CRAN I have troubles with the win-builder.

lockfile operations are rather OS-dependent. You can't just assume they exist
under Windows.  There are reasons many of us hate the non-POSIX compliance of
Windows with a reason---this is one of them.

But you may be in luck as Gabor recently released a package with a _portable_
lockfile implementation, maybe give it a try:

    https://cran.r-project.org/package=filelock

Dirk

-- 
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