🚀 go-pugleaf

>Problem 1.... I am not sure when to use 'threadvars' as 
opposed to standard 'vars' in my thread code.  If someone 
could explain the difference between the two, I would 
really appreciate it. <

Essentially, threadvars are the native Win32 implementation 
of thread-specific variables.  They are a limited resource. 
To conserve resources, Delphi wraps all the member fields 
(variables) of your thread into a single threadvar.  You 
should never need a threadvar.

>Problem 2.... I need to ensure exclusive access to a 
common datastructure from the multiple thread instances.
Do you know of any neat ways to do this in Delphi. The only 
thing I can find in the Borland Docs is the Synchronise() 
function. Is this the way to go ? <

No, use critical sections or mutexes instead.

>I am using Delphi 2 btw. <

Umm, why?  D3 added packages (so you no longer need to 
rebuild complib), divorced the BDE from TDataSet (leading 
to the 3rd-party database market), etc.  D4 added function 
overloading and better support for COM/ActiveX.  D5 is 
shipping now.  D2 was great, 3 years ago.  Time to move on.

--- Art





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