Borland's Database Tookbox 
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 Borland's Database Tookbox

Has anybody made the database in the Borland's database tool box into a
multi-user database?

Wed, 18 Jun 1902 08:00:00 GMT  
 Borland's Database Tookbox
Jake schrieb:


> Has anybody made the database in the Borland's database tool box into
> multi-user database?

Yes, I did. Simply by not using the index files. New
computers are fast enough to re-read the data file
upon program start except with very huge data heaps.

But the TSortedCollections are a lot of work to maintain
with multiuser programming too. I am using interprocess
queues to alert all tasks of a modification and write the
changes to an extra file. A linear file similar to a proto-
col (wrap around after 64 entries) where all tasks get
their information to update the collection (keys).

But I do not like to distribute the source code, maybe
the hints here may give you some ideas.

Btw.: For the datafiles I use now an improved unit, you
find it in the source chapter of the TP-links site,
named "datafile unit". It is a reduced version of what
I am using. I use REAL/32 and DR-Multiuser DOS.

Franz Glaser

Wed, 18 Jun 1902 08:00:00 GMT  
 [ 2 post ] 

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