?
Solved

is shared memory automatically inherited to child process?

Posted on 2007-11-23
2
Medium Priority
?
834 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

Get your Conversational Ransomware Defense e‑book

This e-book gives you an insight into the ransomware threat and reviews the fundamentals of top-notch ransomware preparedness and recovery. To help you protect yourself and your organization. The initial infection may be inevitable, so the best protection is to be fully prepared.

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 demonstrate how we can upgrade Python from version 2.7.6 to Python 2.7.10 on the Linux Mint operating system. I am using an Oracle Virtual Box where I have installed Linux Mint operating system version 17.2. Once yo…
Have you created a query with information for a calendar? ... and then, abra-cadabra, the calendar is done?! I am going to show you how to make that happen. Visualize your data!  ... really see it To use the code to create a calendar from a q…
How to fix incompatible JVM issue while installing Eclipse While installing Eclipse in windows, got one error like above and unable to proceed with the installation. This video describes how to successfully install Eclipse. How to solve incompa…
Suggested Courses

752 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