[2 days left] What’s wrong with your cloud strategy? Learn why multicloud solutions matter with Nimble Storage.Register Now

x
?
Solved

is shared memory automatically inherited to child process?

Posted on 2007-11-23
2
Medium Priority
?
848 Views
Last Modified: 2012-08-13
Hi,

I have a question about a shared memory.
If a parent process gets and attaches a segment of shared memory and then forks a child, would the child process have an access to this shared memory????

Or do I need to explicitly attach this shared memory segment to the child process??
 
0
Comment
Question by:shinymoon
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 12

Accepted Solution

by:
PCableGuy earned 2000 total points
ID: 20341539
Yes, the child has access to the same shared memory as the parent. In fact, shared memory is considered a form of interprocess communication. No need to attach the memory to the child. However, you still need to avoid the problem of the parent and child (or other child processes) writing to same memory location - in that case you need to use semapores too.

http://www.csl.mtu.edu/cs4411.ck/www/NOTES/process/shm/what-is-shm.html

Also check the section here called "Attaching a Shared Memory Segment to an Address Space"
http://www.ccse.kfupm.edu.sa/~akbar/ICS431_032/LabExercises/Lab13/Lab13.html


0
 

Author Comment

by:shinymoon
ID: 20341551
Thank you so much for the clear answer and great website!!! It helped me a lot.
Thank you!!!
0

Featured Post

Free Backup Tool for VMware and Hyper-V

Restore full virtual machine or individual guest files from 19 common file systems directly from the backup file. Schedule VM backups with PowerShell scripts. Set desired time, lean back and let the script to notify you via email upon completion.  

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Have you ever been frustrated by having to click seven times in order to retrieve a small bit of information from the web, always the same seven clicks, scrolling down and down until you reach your target? When you know the benefits of the command l…
The purpose of this article is to fix the unknown display problem in Linux Mint operating system. After installing the OS if you see Display monitor is not recognized then we can install "MESA" utilities to fix this problem or we can install additio…
In this video, Percona Solutions Engineer Barrett Chambers discusses some of the basic syntax differences between MySQL and MongoDB. To learn more check out our webinar on MongoDB administration for MySQL DBA: https://www.percona.com/resources/we…
Want to learn how to record your desktop screen without having to use an outside camera. Click on this video and learn how to use the cool google extension called "Screencastify"! Step 1: Open a new google tab Step 2: Go to the left hand upper corn…
Suggested Courses

649 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question