Re: [Vala] "vala friendly" atomic pointer

[Tal Hadad <tal_hd hotmail com>]

http://www.valadoc.org/#!api=gobject-2.0/GLib.WeakRef

This is a simple solution thanks to the good design of GObject.

Tal

> From: norjaidi tuah ubd edu bn
> To: vala-list gnome org
> Date: Thu, 19 Dec 2013 08:59:44 +0800
> Subject: [Vala] "vala friendly" atomic pointer
>
> Dear all,
>
> I want to implement something like these:
>    *  x = AtomicPointer  get (ref atomicRef)   // reader
>
>    *  AtomicPointer  set (ref atomicRef, newref)  // writer
>
>    *  return AtomicPointer  get (ref atomicRef)  // reader
>
> but have the benefit of vala ref counting.
>
> The best I can think of is:
>
>    *  lock (atomicRef) { x = atomicRef; }
>
>    *  lock (atomicRef) { atomicRef = newref; }
>
>    *  lock (atomicRef) { return atomicRef; }
>
> But lock is too course.
> e.g., lock (atomicRef) {x = atomicRef;} will also lock
> out other readers, whereas AtomicPointer.get won't.
>
> I realise that the exclusive region is small.
> But if you have a lot of readers, the effect
> may be significant.
>
> Any suggestions?
>
>
> Nice day
> Nor Jaidi Tuah
>
>
>
>
>
>
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