[Lazarus] thread safe

[Martin]

On 22/06/2011 23:37, Malcom Haak wrote:
> Correct me if I'm wrong, But can't you technically make any code 
> 'thread-safe'  by using Critical Sections before doing work. 

I don't think so.

If the function, for example stores some important data in a thread 
local variable, but flags (thread global) the availability of the data, 
then no Critical section will fix it.

Admittedly this is a constructed case, and sounds like an extremely poor 
implementation... But it shows that thread-safety is more than just a 
Critical Section. After execution of a thread-save function the overall 
state of your app (and the entire system) must still be valid (and it 
must be so, for each thread).

Martin