This is a valid point.
The only downside is that the object will every time do a deep copy versus a
shallow (pointer only) copy. Deep copy is very, very expensive operation.
Adding ref. counting to objects is probably equivalent of one interlocked
assembly instruction, so a very small difference, probably not even measurable.
Copy of a large object can take a large memory transfer, and will also reserve
memory for each copy, thus significantly increasing memory.
While both approaches have something going for them, they are not total subside
for each other.
With best regards,
Boian Mitov
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Mitov Software
www.mitov.com
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From: August Oktobar
Sent: Tuesday, September 23, 2014 10:35 AM
To: FPC developers' list
Subject: Re: [fpc-devel] Suggestion: reference counted objects
To somebody (probably Sven):
In FPC there is concept of stack based objects (object) that behave like
classes (with inheritance)?
Why not just extend this object with support for constructors and destructors,
and there is no need for the ARC?
On Mon, Sep 22, 2014 at 2:05 PM, Hans-Peter Diettrich <drdiettri...@aol.com>
wrote:
Sven Barth schrieb:
Am 22.09.2014 09:47 schrieb "Michael Schnell" <mschn...@lumino.de
> Why not use "interface" to add ref-counting to an object ? This seems to
work nicely even though the name "interface" in not "speaking" on that behalf.
Because you'll need to declare an interface for each class you want to have
reference counted so that you can access its methods, properties, etc.
This overhead could be eliminated by another syntax extension, like
TMyARCclass = interface(TObject)
where the Compiler could allow for implementations of the declared methods
just as for
TMyARCclass = class(TObject)
bridging the gap between traditional (strictly declarative) interfaces and
classes (including implementations), with or without ARC.
DoDi
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