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The title is the question it is.

Legend:

  1. Project A = .Net Core project

  2. Project B = Legacy C++ project

  3. MMF = Persistent Memory-mapped file

Detailed question description:

I currently working on (PROJECT A) which using [DllImport] to import native library which written on C++ to access the MMF.

I have another legacy application (PROJECT B) continuously updating that MMF.

What I want is, if there is some change in specific section of the MMF. We trigger the function in project A.

If you have any clue, please help. Thank you

Kien Alexander Nguyen
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  • You need to use IPC and synchronisation. Which makes one wonder why you don't use a message passing approach instead of shared memory. What made you choose shared memory? – David Heffernan Sep 17 '19 at 07:06
  • Windows can track changes to files, but it won't notify you of what specific bytes have changed. You could use a combination of notifications (`FIleWatcher` et al) combined with reading the relevant parts of the file, or per David you'll need to actually implement specific mechanisms to signal the change beyond just changing the file. – Jeroen Mostert Sep 17 '19 at 09:49
  • @DavidHeffernan since my legacy application using MMF as storage. And I don't have authorize to change the architecture of it – Kien Alexander Nguyen Sep 18 '19 at 00:11
  • By the time that you've implemented the message passing and synchronisation, you may as well do it all that way – David Heffernan Sep 18 '19 at 07:05

0 Answers0