On the windows NTFS file system versioning can be simulated by multiple data stream per file (http://www.ntfs.com/ntfs-multiple.htm) (the file name is <full path>:stream name). You can save highest version number in a seperate stream that can be locked during access (each stream in a file can be locked individaly).
This is none-portable code.... (but all the versioning staff is none-portable anyway). I really enjoyed using the filesystem library! Daniel "Beman Dawes" <[EMAIL PROTECTED]> wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > At 01:08 PM 1/1/2003, Alberto Barbati wrote: > >Hi, > > > >first of all, I want to thank Beman Dawes and all others that > >contributed with the design and development of the Filesystem library. > >It's a wonderful piece of work. > > Thanks! A lot of people have been helping. > > >I just would like to propose a couple of additions that I believe are > >very useful. Both features regard temporary files. > > Ha! I've been waiting for that shoe to drop. > > Yes, there is a real need. And as you point out, more that one need. > > I've also run into a third need, the ability to great a new file, given a > hint, but as a regular file with no "temporary" implications. > > Some operating systems have a "file version" or "generation dataset" > feature to deal with this. But it has to be simulated in POSIX and Windows > filesystems by dancing around with file names. Something like, if the hint > is "foo.txt", find the file "foo-#.txt" with the highest value of #, and > then create a new file where # has been incremented by one. > > Because of the race-condition issue mentioned by Thomas Witt the exact > specs on these functions aren't easy. > > I'm focused right now on trying to finish off the remaining issues with the > current library. But if we can agree on a small set of add functions, they > shouldn't be hard to add. > > Thanks, > > --Beman > > > _______________________________________________ > Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost > _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
