[fpc-devel]RE: Free Pascal version 1.0.6 released

[Michael Schnell]

== Ursprüngliche Mitteilung von ccodere at ieee.org am 6.05.02 23:14
>Now that v1.0.6 is released, work will be concentrated on v1.1 of the
>compiler, which will eventually form the v1.2 release.
>
>multithreading...

=== Kommentar von MSCHNELL at LUMINO (Michael Schnell) am 7.05.02 09:04

I did an implementation of TThreads for Free Pascal some months ago. It does 
work, but we can not use several FP features of OPs, as things like creating 
an instance of a class, long strings and such things that use the memory 
management are not thread-safe.

We tried to make the heap management thread save (without using my TThread 
class, even without using classes at all, just using clone() to create a new 
process) by introducing a locking mechanism, but in the end failed due to 
still unknown reasons.

We were able to make the same project run safe when we set the clone flags 
_not_ to share memory between the processes. Of course we could not use nice 
and easy inter thread communication like TThreadList (which is very easily 
derived from TList)

Can/should I work with you on the implementation of multithreadding in FP ?


-Michael Schnell, Lumino GmbH,
 Oppumer Straße 81-83, D-47799 Krefeld, Germany.
 mailto:mschnell at lumino.de       http://www.lumino.de
 Tel.: +49-2151-8196-72  Fax: +49-2151-8196-66-72