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Postings from January 2006
demerphq wrote: > On 1/30/06, Linda W <perl-diddler@tlinx.org> wrote: >> demerphq wrote: >>> We dont need this behaviour as we arent going to be dealing with any >>> DLL's that will be started prior to perl starting. Move at boot >>> behaviour is only required for dlls that are loaded at boot. Since the >>> files we care about are only locked because of Perl we only need close >>> perl. >> --- >> The Windows API "MoveFileEx" is used to move _any_ DLL that is >> locked in memory. It isn't something primarily used by device drivers, >> but by any "setup" or install program that replaces "DLL"s loaded in >> memory. > > Hmm, I dont see anything about moving dll's that are locked in memory > specifically. I do see the MOVEFILE_DELAY_UNTIL_REBOOT stuff tho. > Which is as you've pointed out a useful thing. (Or horrible kludge, > whatever :-) --- Yeah...a bit kludgey, I'd agree. There isn't anything specifically written about rename being allowed: it just works and makes sense on NT given that it backs demand paged executable images either from its paging file or directly from a suitable image-file using (device,startblock,#blocks). >> The "MoveFileEx" API is supported on both win-nt and win-95 based >> systems. > > Heh. The documentation on MoveFileEx specifies that the function isn't > available under Win95. So that is wrong in your experience? --- My bad, the full quote was "Windows 95 and Windows NT each provide a unique method for helping applications to remove, replace, or rename files and directories that are in use. " I certainly can't say much about Win95...the article is unclear about the behavior in 98, 98SE & ME. It's hard to imagine the recommended procedure on 98SE & ME being limited to storing renames in a 'wininit.ini' file, but I no longer have a win98 installation to test this on. Hmmm. > The original issue stems from the fact that MB uses Cwd to do its > business, but MB is the module that is responsible for installing Cwd. > The bigger issue that multiple perl sessions (or other processes) > could also lock the DLL's actually never occured to me. The chicken > and egg problem however was hard to avoid. :-) --- Yep. The conveniences we are used to on *nix. :-) > Anyway, attached is a patch for ExtUtils::MakeMaker::Install that is > capable of installing Pathtools (ie Cwd) by doing the rename trick > with MoveFileEx for deletion of the old copy. If the rename fails is > arranges to do the whole thing at reboot. --- Cool! Just thinking about testing on WinME/9x gives me a headache though. LindaThread Previous | Thread Next