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Re: Shared variables under win32?

by BrowserUk (Patriarch)
on Feb 03, 2004 at 05:26 UTC ( #326114=note: print w/replies, xml ) Need Help??


in reply to Shared variables under win32?

Use Storable freeze/thaw to do the serialisation and then Win32::API::Prototype to access the APIs for one of the 9 forms of IPC available.

Win32::Clipboard is one of the easiest (and fastest) IPC mechanisms, though with the binary data produced by Storable, you will probably have to pass the data as CF_BITMAP to fake out the formatting.


Examine what is said, not who speaks.
"Efficiency is intelligent laziness." -David Dunham
"Think for yourself!" - Abigail
Timing (and a little luck) are everything!

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Re: Re: Shared variables under win32?
by halley (Prior) on Feb 03, 2004 at 16:34 UTC
    The suggestion to use the clipboard as an IPC method is a pretty sad commentary. The clipboard is a user interface concept, not another anonymous pipe you can open between two processes.

    Scenario: The user starts your scripts, then goes on to do something entirely different, and on the first Ctrl+C, hoses your scripts. Of course, it's not obvious that the scripts have failed, and it probably won't be obvious why they failed. Unless the user does a Ctrl+V at some point, and chunks of perl object data are spewed into their document.

    From an architectural point of view, it's merely a lack of thought about the data flow: other processes may poison or be poisoned by your use of that particular IPC channel. From a user design point of view, it's damaging the user interaction model by subverting the user's metaphor to grasp of what's going on in the computer.

    Poking stuff into the clipboard is pretty cool: when the user directs the activity. Grabbing stuff from the clipboard is pretty cool: when the user directs the activity. The APIs were made quick and simple, to facilitate application designers who wanted to make their apps quick and simple.

    --
    [ e d @ h a l l e y . c c ]

Re: Re: Shared variables under win32?
by xiper (Friar) on Feb 03, 2004 at 06:14 UTC
    Win32::Clipboard can only write text to the clipboard (doesn't rule out Data::Dumper or MIME::Base64, although the concept still sounds messy). Will investigate Win32::API::Prototype - any examples? It's been a while since i played with the win32 api...

    - ><iper

    use japh; print;

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