Re: [Vala] Deriving classes from GLib.Thread

[Andrew Benton <andrew benton675 gmail com>]

I believe that the problem that you are having is due to the fact that 
GLib.Thread<T> is a compact class.  When classes are compact, it means 
that you cannot inherit from them.

For information on compact classes, look here: 
https://live.gnome.org/Vala/ReferenceHandling#Memory_management_for_compact_classes_without_reference_counting 


On 4/30/2013 6:43 AM, Richard Wiedenhöft wrote:
> Hi,
>
> I am trying to add some functionality (e.g. an is_alive-method) to the
> GLib.Thread class, but with the following code:
>
> class MThread<T> : GLib.Thread<T> {
>          public MThread(string? name, ThreadFunc<T> func) {
>                  base(name, func);
>          }
>
>          public MThread.try(string? name, ThreadFunc<T> func) throws Error {
>                  base.try(name, func);
>          }
> }
>
> I get the following error:
>
> MThread.vala:3.3-3.18: error: chain up to `GLib.Thread' not supported
>          base(name, func);
>          ^^^^^^^^^^^^^^^^
> MThread.vala:7.3-7.10: error: The name `try' does not exist in the
> context of `GLib.Thread<T>'
>          base.try(name, func);
>          ^^^^^^^^
> MThread.vala:6.2-6.19: error: unable to chain up to private base constructor
>      public MThread.try(string? name, ThreadFunc<T> func) throws Error {
>      ^^^^^^^^^^^^^^^^^^
> Compilation failed: 3 error(s), 0 warning(s)
>
> I found a similar issue in
> https://mail.gnome.org/archives/vala-list/2009-October/msg00000.html but
> it is not helping me very much. It just gives me
> the idea, that my problem is something that is not as easily solved as
> it sounds...
>
> Thanks for any help in advance
>
>
>
>
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