Windows API Memory Mapped Files Explained

Рет қаралды 8,327

Күн бұрын

Пікірлер: 35

@theoriginalneckbeard 11 ай бұрын

Hey, Nir. I wanted to thank you, simply because you're my favorite programming related channel right now and make me having hope in serious, high quality and non click-bait-y content on KZbin again. Its informational and educational, quality over quantity and I appreciate exactly this in these days and times, where most channels point their focus on generating the most possible traffic through being striking and superficial.

@nirlichtman 11 ай бұрын

Thanks, I appreciate this :)

@minnoxzmozzesmx8915 11 ай бұрын

I've known mmap for a long time, but not understand the practical use of it. Thanks for the tutorial.

@itsdrdy5551 11 ай бұрын

mmap in windows is VirtualAlloc, not a mapped file

@jorgerias262 11 ай бұрын

Thanks, currently learning this in my OS class, but it's super insightful and useful to see someone program it.

@oracleoftroy 11 ай бұрын

This seems like it has some pretty serious race conditions. Without knowing exactly what the guarantees for the shared condition variable are in windows off the top of my head, I think you would want to not autoreset so that the file won't be written to while you are reading it, and only reset once the read is finished. And you probably want to make sure it is false before the server writes new data,.. assuming we want every write to be followed by a read. (Something else would need to be done otherwise.) Still, pretty neat seeing how easy it is to set this up. I haven't needed something quite like this before and didnt realize that it doesn't take much code ro get it working.

@rian0xFFF 11 ай бұрын

Next video: Making a simple GPT-4 AI in C on Windows

@nirlichtman 11 ай бұрын

😂 "Minimalist" AI

@holiamusic 11 ай бұрын

xD@@nirlichtman

@ngokhanh7291 11 ай бұрын

AI that predicts the age based on an input age

@guilhermebonato4074 2 ай бұрын

is possible to make a Lit in processes a and send to processes b in memori ?

@harunsarpnar3428 11 ай бұрын

high quality content congrats👏👏

@angelffg 11 ай бұрын

Excellent video! Nir, does this apply to applications between 2 or more computers on an internal network or does it only work for communication between programs on the same computer? Thanks for supporting!

@nirlichtman 11 ай бұрын

Thanks! It only works for communication between programs on the same computer, I mostly used this example to demonstrate basic usage of memory mapped files

@angelffg 11 ай бұрын

@@nirlichtman Thanks Nir, excellent content!

@jmvr 3 ай бұрын

I'd assume that if you want communication between multiple computers, you'd want to look into the WinSock2 API, or similar networking APIs.

@angelffg 3 ай бұрын

@@jmvr Thanks 🙌🏻

@Pipe0481 11 ай бұрын

I'd love to see the Linux equivalent of this

@ryonagana 11 ай бұрын

on linux. pipe/socket is the only way

@dimi144 11 ай бұрын

mmap has an fd parameter that lets you map a file into memory

@ISAK.M 9 ай бұрын

This was so well explained thank u man

@chuckhaatvedt7515 28 күн бұрын

Nir, could you expand on this example to show two way communication between the server and client ? thanks, this is very informative

@nirlichtman 25 күн бұрын

One way to implement two way communication is to CreateThread on both the server and client and then you can have the thread listen on an event and read the message when triggered

@3bdo3id 10 ай бұрын

Great work, I loved it

@thisisnotok2100 11 ай бұрын

Very cool. I've had an interest in how vpn clients "hijack" traffic to encrypt and reroute it to the the VPN server. Could you do a simple demonstration of an application that does something like this?

@nirlichtman 11 ай бұрын

Thanks! Could you give an example about this? I am pretty sure the VPN clients just work by changing the network settings on the computer and set up the traffic to go through the VPN server