Multi Threading in PerlApp generate using perl2exe

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Dear Monks, I have written an application (generated using perl2exe) which will launch the another application (again generated using perl2exe). What i am trying to achieve is, when my new application is launched, the old one should get exited and its exe file should be deleted. For which I am using a windows batch file. I have tried this using Thread() as well as using Fork() but I get the error as "cannot access the file app.exe as it is being used by another process". Please help. Thanks, Mansi

Comment on Multi Threading in PerlApp generate using perl2exe

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Re: Multi Threading in PerlApp generate using perl2exe by jellisii2 (Hermit) on Nov 18, 2013 at 13:51 UTC
I don't think you can do this in the manner you're expressing... Since the first file is technically still executing (with a `system` or `fork` command) the second file, the OS will (usually) be smart. You could try to `exec` the second file in the first one and then `exit` the first, as it's supposed to fire and not worry about returning. Then your second file could `unlink` the first one, but I think that's the wrong approach too. Were I in your shoes, I'd consider a THIRD file to manage the execution of the first two. That way you don't have to jump through any hoops in coping with OS locking. Having that third file self-delete is going to be host related each time, or the second file could remove the management script at some point.	[reply] [d/l] [select]
Re^2: Multi Threading in PerlApp generate using perl2exe by Anonymous Monk on Nov 19, 2013 at 05:47 UTC
Thanks for your reply, will try that way i.e to write a third file to manage two files. However just for information, I am trying to simuilate the application synchronization using perl, where everytime an application is launched it will download the config file first and will check is there is version mismatch of local copy with that of the repository copy(which is uploaded on some webpage) and if there is a mismatch it will download the newer version. I am bit afraid having the third file will slove this issue as I may need to launch the third file from the first exe.	[reply]
Re^3: Multi Threading in PerlApp generate using perl2exe by jellisii2 (Hermit) on Nov 19, 2013 at 13:59 UTC
Assuming you can easily get a version number from your source, have your script take an option that can get it to dump it's version number. GetOpt::Long is exceptionally good for this. Depending on the specifics, you may be able to get back down to two files.	[reply]