Re: [Vala] How to prevent gee.HashMap.set from copy the memory and only return the pointer?

[Jonas Kulla <nyocurio gmail com>]

2013/7/2 Nadav Vinik <nadavvin gmail com>

> Hello
>
> when I try to set an object to HashMap gee.HashMap.set try to copy the
> memory of it with _vala_array_dup1 and it not allowed in my case.
>
> public class pcapNode {
>     public uchar[] packet;
>     public PCap.packet_header* header;
> }
>
> var node = new pcapNode();
> node.packet = packet;
> node.header = &header;
> this.map[i] = node;
>
> _tmp34_ = pcap_node_new ();
> node = _tmp34_;
> _tmp35_ = node;
> _tmp36_ = packet;
> _tmp36__length1 = packet_length1;
> _tmp37_ = (_tmp36_ != NULL) ? _vala_array_dup1 (_tmp36_, _tmp36__length1) :
> ((gpointer) _tmp36_);
>
> I guess I should define packet as pointer to uchar[] but I didn't success
> to do it.
>
> Thanks
> Nadav
> --
> הבלוג שלי:
> http://nadavvin.com
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Hi,

it's not the HashMap trying to copy your array, but simply Vala syntax.
When you assign the array packet to node.packet, Vala treats this array
as a value type, meaning assignment equals copying. To stop it from doing
that,
try defining the 'packet' field in pcapNode as "unowned".

Jonas