Using a table to store PCB information?

This is a discussion on Using a table to store PCB information? within the Tech Board forums, part of the Community Boards category; I've been reading up on operating systems and trying to understand the flury of information i'm digesting. This question pertains ...

  1. #1
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    Using a table to store PCB information?

    I've been reading up on operating systems and trying to understand the flury of information i'm digesting. This question pertains to storing PCB's. What are the benefits and limitations of storing Process Control Blocks in a table (array) data structure? And I don't understand how someone would implement a queue of processes using the table...

    Benefits:
    -Faster access time
    -Blocks in order

    Limitations:
    -Pre-defined size

    Can anyone help me figure out some more?

  2. #2
    and the hat of wrongness Salem's Avatar
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    > And I don't understand how someone would implement a queue of processes using the table
    Unlike a traditional linked list, using a next pointer, a linked list through an array could be done using a next subscript.

    It could even be done using pointers, with
    array[n].next = &array[m];

    The table size is fixed to prevent run-away creation of processes implementing a DoS attack.

    A pre-allocated table means you're always sure of being able to create the number of resources which could be created.
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    Also, using a predefined table size for process control blocks will prevent the need to allocate memory dynamically inside the process creation code.

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