[fpc-devel] Suggestion: reference counted objects

[Boian Mitov]

That is easy. it gets incremented when it gets assigned. The running threads 
have no way of accessing it if there is no reference (assignment) already in 
place.
Indeed that is how it works in Delphi, and BTW: that is how Strings work in 
Delphi and FPC the last time I checked ;-) .

With best regards,
Boian Mitov

-------------------------------------------------------
Mitov Software
www.mitov.com
-------------------------------------------------------
-----Original Message----- 
From: Hans-Peter Diettrich
Sent: Saturday, September 20, 2014 8:34 PM
To: FPC developers' list
Subject: Re: [fpc-devel] Suggestion: reference counted objects

Sven Barth schrieb:
> Am 20.09.2014 20:34 schrieb "Giuliano Colla"

As I understand Interlocked Inc/Dec funtionality, it only protects the
update of the reference counter against interrupts, but not the tests
required before/after this update. As a precaution a RefCount should at
least be incremented as soon as there exists a *chance*, that the
reference is used/copied in some piece of currently active code (thread...).

DoDi

_______________________________________________
fpc-devel maillist  -  fpc-devel at lists.freepascal.org
http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel