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Somewhat dated, but a good in-depth discussion on Windows MMF can be found here: might come useful should you like to try and add Win98 support to Win32::MMF yourself (not everything can be done, but MMF existed already in Win3.11 IIRC). That will require some 'dirty' work with XS and C, but the module author would probably be willing to help.
If I were to do it (given my ability with XS) I'd take the local networking path. All you need for the server program is a port to network repeater:
  • a thread reads from the port and writes into some memory buffer (even a perl scalar might do, depends on buffer size); Device-Parallel-Port should probably do what you need (and portably too)
  • another thread answers UDP requests with chunks taken from the shared buffer; regular sockets are all you need
It could even be done in a single thread, given that both processes should complete pretty fast.
Hope that's enough to get you started,
Ant9000

In reply to Re: Re: Re: Communication between seperate scripts by ant9000
in thread Communication between seperate scripts by Jouke

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