How do we handle data integrity issues with semaphores?
For example, lets say you are writing data to a database, and you also want to write a
size to the database as well.
I currently allocate the memory, write the data, then write the size.
However, since the OS is multi-threaded, the pager card, for example, could interrupt
into the middle of this operation, add data to the storage memory, potentially fill up
storage memory or crash, and then I am left with only the first write operation and
not the second, and therefore corrupt data.
Are there any OS calls to prevent an interrupt at this level?
Shannon
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Hands High Software, Inc.
Award winning software for the Palm OS platform
<http://www.handshigh.com/>
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