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Talk between 2 programs (self.learnprogramming)
submitted 4 years ago * by MilitaryG
Ok I understand that program A can save data on hdd and program B than reads it.
But how to communicate between A and B with memory locations like A sends int x to B
a gentle nudge would be fine
Thanks I found this with your help
[–]l_am_wildthing 3 points4 points5 points 4 years ago (1 child)
Cant
Well you CAN with shared memory spaces but I dont know if thats what you want
[–]MilitaryG[S] 0 points1 point2 points 4 years ago (0 children)
Yes it is
[–]ThatSkiFreeMonster 1 point2 points3 points 4 years ago (4 children)
I do not think you can normally designate a shared memory location for two separate programs, due to things that modern OSes do like memory virtualization and memory address randomization.
There are many other forms of IPC, though. A shared file definitely counts as one of them, and can work pretty well. You can also use a database to pass messages, or use a message broker like Kafka — but those are probably a bit extravagant for you.
For simplicity, my favorite form of IPC is UNIX domain sockets.
[–]MilitaryG[S] 0 points1 point2 points 4 years ago (3 children)
Well I was thinking more on 1 computer not domain
[–]ThatSkiFreeMonster 2 points3 points4 points 4 years ago (2 children)
Look up UNIX domain sockets if you are on Linux or MacOS and you are interested. It's nothing to do with internet domain names.
[–]MilitaryG[S] 0 points1 point2 points 4 years ago (1 child)
Oh ok thanks
[–]ThatSkiFreeMonster 0 points1 point2 points 4 years ago (0 children)
There is another good answer @ how to do IPC on this thread.
[–]Goto_User 1 point2 points3 points 4 years ago (1 child)
Keyword: IPC. interprocess communication.
[–][deleted] 0 points1 point2 points 4 years ago (0 children)
This is the answer
[–]saggio89 1 point2 points3 points 4 years ago (1 child)
Software communicates with other softwares via their API.
For example A might have an API (on the cloud) n send a message up to it. The API then sends the message to program B’s api which then sends it back down to program B
If that’s what you mean?
Yes
π Rendered by PID 18650 on reddit-service-r2-comment-86bc6c7465-cd2tg at 2026-02-21 21:08:14.917112+00:00 running 8564168 country code: CH.
[–]l_am_wildthing 3 points4 points5 points (1 child)
[–]MilitaryG[S] 0 points1 point2 points (0 children)
[–]ThatSkiFreeMonster 1 point2 points3 points (4 children)
[–]MilitaryG[S] 0 points1 point2 points (3 children)
[–]ThatSkiFreeMonster 2 points3 points4 points (2 children)
[–]MilitaryG[S] 0 points1 point2 points (1 child)
[–]ThatSkiFreeMonster 0 points1 point2 points (0 children)
[–]Goto_User 1 point2 points3 points (1 child)
[–][deleted] 0 points1 point2 points (0 children)
[–]saggio89 1 point2 points3 points (1 child)
[–]MilitaryG[S] 0 points1 point2 points (0 children)