I looked at the APR code to get some ideas for the Win32 port. Some of the ideas were good, but in other places like rename they didn't do very well we were better off doing it ourselves and getting it right.
I remember looking at their code to fix the rename/unlink while the file is open problem, and they didn't seem to have a fix for that so we developed our own method that works like Unix.
sorry, but your rename doesn't work on cygwin. maybe it works with mingw.
cygwin has it's own and working way of doing rename's. maybe you should have looked at the cygwin sources instead. (src/winsup/cygwin/syscalls.cc)
first doing a WinAPI MoveFileEx and then after a failure trying the cygwin version, which will also try its own MoveFile loop, will not work. they are conflicting.
same with unlink, but at least the mingw and cygwin unlink versions don't conflict here. here you don't stack two conflicting loops together.
nevertheless cygwin's unlink is much better than pgunlink in case of locking problems. it does its own sort of delayed removal then.
IMHO port/dirmod.c is a dirty and half-baked hack, which works for mingw only.
--
Reini Urban
http://xarch.tu-graz.ac.at/home/rurban/
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