Keeping track of static external structure

Hi guys...I need some quick help getting going on this. I need to create an array of 20 structures and keep track of them as static variables. The structure is as follows: (it's object oriented C)

typedef struct sched_unit
{
int unitNumber;
int position;
int numRecords;
FINO_T *schedObj;
FINOCLIST_PTR_T errorList;
} SCHED_UNIT_T;

The schedObj is the main data that i need to keep track of. These objects will be added and deleted from the array as needed. Do I need to declare another static pointer to this structure and then allocate memory for it as needed. What is the best way to go about doing this??

John

Don't bother with static. Use a global list pointer.

Quzah.

care to expand on that?

Sure. Make a global variable.

SCHED_UNIT_T *myData;

If you want to "protect" this, make your functions that modify this data static so they can only be called from within the same file. Make an accessor functions that aren't static that can be used to manipulate the data safely.

Actually though, from the description of it, if all you need is an array of 20 max, just use an array instead of a pointer.

SCHED_UNIT_T myData[20];

Then make functions that "add" or "remove" items from the list. You could treat it like a stack and just use a variable some place to keep track of the total number of items in the array.

int dataCount;

Then just check to see if your array is full before you add, or empty before you remove.

When I initally said 'list poitner', I was thinking you were using a linked list, not an array.

Quzah.

Do you have to declare the array as static?

Quote:

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Originally posted by pwilfred
Do you have to declare the array as static?

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1) Yes, if you're going to have it localized to a function.
2) No, not if it's global, or if it's in the main fuction and you're passing it to other functions.

Quzah.

Thanks a lot. I will try that.