[fpc-pascal] TThread.Queue vs TThread.Synchronize

[Sven Barth]

On 23.02.2015 20:49, Philippe Lévi wrote:
> sorry ... I still not understand the "idea".
>
>
> if code in thread access a local variable (in stack) of the function
> where thread is issued ... it may access "something" which does not
> exist any more. correct?

It's not about the thread, but about the scope. As long as you pass a 
nested procedure around and that is only stored/used as long as the 
procedure in which the nested procedure is declared is in scope as well 
everything is fine. But once the surrounding procedure exits the 
procedure variable is no basically no longer valid, because the stack 
frame of the outer procedure no longer exists.

Only anonymous functions/closures will change that.

Regards,
Sven