Program for Inter-Process Communication using shared memory

[@aninditasaha0307]

Excellent sir... Simplest... Yet serving the purpose...very helpful for students... Can you make video on message queues?

[@dextutor]

Thanks a lot.. Will upload the video by next week

[@tarunnaik3053]

You made the topics much much more simpler than they are actually sir.Great Explanation 🙇

[@bestdeal3385]

i guess this was the best explanation,thank you sir

[@dextutor]

Thanks.. Keep sharing

[@pakreactions-y5c]

outstanding

[@mazharkhaliq1971]

Thanks for the video 👏👏👏

[@gayathriciddamsetty4826]

Nice explanation 👌. Thank you

[@kanunithu2048]

Thanks a lot, sir

[@ayeshaadhikari6123]

Thank you so much sir :) really helpful

[@deletevil]

Great explanation sir! Sir very important thing you didn't tell us. How do we clear/purge the memory occupied by the shared_memory. The first program that was the sender-program had exited. Do we need to call a function from receiver-program to delete the shared_memory?

[@dextutor]

Use memset() function

[@navneetkaurpopli2766]

great lab. Thanks

[@gouravshaw6254]

Great explanation 👌👍

[@dhanrajv7473]

hello sir could you tell me how to make this as full duplex communication using shared memory . example it can take input from any 1/2nd process ,and it should receive in another process

[@leepakshiyadav1643]

Great explanation.Thanks :)

[@hxong4733]

Thank you sir!

[@_LAKSHAWADHWANI]

Thanks a lot! :)

[@chinnurpk3519]

Why the address for shared memory changes for sender and receiver??

[@dextutor]

It is the address at which the process gets attached with shared segment. So it can not be same for sender and receiver

[@chinnurpk3519]

@@dextutor ok thanks for clarifying my doubt

[@nadakudurutejakanth8500]

Supr sir ❤

[@Tom-fx9mk]

How do I determine how much space I need to use for the second argument of shmget? The file I'll be having the processes write to will be in the shared memory. Is 1024 bytes too little in my case (since I'll be having up to 20 processes writing a sentence to the file several times)?

[@dextutor]

Managing space is upto the programmer.. Not all 20 process will be writing at the same time.. So after one process writes some make sure the reader process reads it before another process overwrites it.. If you feel the space is less you can allocate more space..just change 1024 to any number you want

[@abhijitkumarsinha]

why in the receiver program we got different address for shared memory .....it get attached to the same memory segment then it should give the same address

[@dextutor]

Shmat returns the address where the process gets attached to memory segment, not the address of the memory segment. That's why it's different for both process

[@abhijitkumarsinha]

thanks sir@@dextutor

[@chandinikm7129]

I am getting different key value in reciver program...written code as same .

[@rahulpawar811]

In second program in output the first program data we written is not show.. segment fault message show

[@dextutor]

Check your code again..

[@rahulpawar811]

@@dextutor I check but same problem.... even I copy program from your site ,same problem occurs

[@dextutor]

Email me the snapshot of your programs

[@rabiulhasan4674]

Can You Help Me This Program Design a program that including 2 sub processes,it receives standard input,through sharing memory,the father process transmits a serial of number(>=10 )to the sub processes,after the sub processes receive the interupt signal from the father process: 1) one subprocess plus the numbers 2)the other subprocess mulitple the numbers Then through the message queue send the result to the father process,and the father process printf the numbers.

[@dextutor]

Hi.. All the requirements are covered in the videos.. I will list out broadly 1. Create two sub(child processes) using fork 2. Use shared memory to send the input to sub processes 3. Perform individual Calculations 4. Create message queue to send back the results to the parent process

[@guidosalescalvano9862]

Did I miss something, or did you not deallocate the memory? How do you deallocate?

[@agpskalaparipaadeex7077]

is it possible When a process communicates with each other, the timestamp is recorded with +5 secs?

[@dextutor]

Use strftime function to fetch the time of communication and then add any additional time you want

[@ohm_chiluka]

Getting an error for: error: invalid conversion from ‘void*’ to ‘char*’ [-fpermissive] 18 | strcpy(shared_memory,buff); //data written to shared memory | ^~~~~~~~~~~~~ | | | void*

[@TonyStark-lb2rj]

just typecast it like -> strcpy((char*)shared_memory,buff);

[@rekhavaishnav1462]

Sir who to use Iostat command in wsl

[@prathapbillgates]

Nice video. can you make IPC memory passing video?

[@dextutor]

I guess u meant message queues.. The video will be up soon.. Till that time have a look at this link dextutor.com/program-for-ipc-using-message-queues/

[@prashantkassa9162]

Where this shared memory created

[@dextutor]

RAM

[@vaibhavpallod1023]

Sir use OBS software for recording your videos has poor quality butttt.... your videos are alot informational so thank you so much !

[@dextutor]

Quality issue in terms of audio or video?

[@vaibhavpallod1023]

@@dextutor video

[@dextutor]

Thanks for the suggestion..i will work on that.. Check the latest video on Message queues and share if it was better

[@vaibhavpallod1023]

@@dextutor sure man

[@manjeetkapil1882]

Thanks brother

[@dextutor]

Welcome... Please share among your friends

[@theazkaasmat6647]

how to complie

[@augustinradjou3909]

gcc file_name.c

[@silvianair7423]

Can we turn this into a function???

[@dextutor]

Yes, you can