I am developing an app. that will store approx. 500,000 contacts. To do this I
have my own heavily normalized database inside the Palm database (memory
chunks).
The data will be almost read only. That is, there are a couple of bytes whose
value can be changed; but nothing can be added, deleted or change in size.
As the records in my main table are nothing more than indexes into other
tables, I am concerned about the persistency of any memory pointer I retrieve.
In a simplistic example say I have a a record(mine not Palm) with
Two fields
FirstNameKey (23)
LastNameKey (104)
If I retrieve a pointer to my FirstNameData (e.g. PalmRecord 6 pointer + 25
byte offset)
Will that remain valid after I have done the same thing for LastNameData and,
possibly, an additional 5 contacts?
In other words, can I retrieve the locations of the data I want initially and
write the strings to the screen direct from memory later, when I need to, or
will I have to copy the actual string data ('John', 'Doe') into memory at the
moment that I find its location?
Obviously the latter would use much more memory, be slower, and require lots
more memory allocation and disposal.
I just want to make sure that I do not get bitten after the application is
deployed by something that did not show up during testing because the memory
"just happened" to stay stable.
Thanks,
Clive
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