sharing resources between programs

This is a discussion on sharing resources between programs within the C Programming forums, part of the General Programming Boards category; Hi This question is related to Systems Programming Problem- Create a linked list with 5 nodes - Size of nodes ...

  1. #1
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    sharing resources between programs

    Hi
    This question is related to Systems Programming

    Problem-
    Create a linked list with 5 nodes -
    Size of nodes 10K,20K,30,40,50K
    Assume node1 and node3 load with program 1 and 2 store the new program in the following size 60K.
    Using Best fit and first fit method.

    My doubts-
    1-How do u make a program access data in another program.( I know global vars come in somewhere but don't know how to link the programs )

    Any sort of help will be appreciated!
    cheers!

  2. #2
    Kernel hacker
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    Your question makes me ask two more questions to clarify what you want to do.

    1. What do you mean by a program. Is a program the same as an executable?

    2. What system is this supposed to run on? What compiler are you using?

    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

  3. #3
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    I guess a program is code that is stored as a separate file and can be compiled independently.

    The system is Unix GCC compiler.
    thanks for ur interest.

  4. #4
    Kernel hacker
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    Well, if the "executable file" is a separate process, then to share it with any other process, you will need to use something called "shared memory".

    Here's a Linux link that shows some variants of shared memory; other Unix variants may have other implementations [although these two are the most common ones]:
    http://fscked.org/writings/SHM/shm.html

    --
    Mats
    Compilers can produce warnings - make the compiler programmers happy: Use them!
    Please don't PM me for help - and no, I don't do help over instant messengers.

  5. #5
    and the Hat of Guessing tabstop's Avatar
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    Are you actually supposed to learn about shared memory, or is this just a really bad word problem for the knapsack problem? Somehow the latter seems more likely to me.

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