Re: [Vala] Vala: Signal from POSIX

[Phil Housley <undeconstructed gmail com>]

On 18 October 2010 09:35, Ervin Orense Balaoro <ierosvin gmail com> wrote:
> Hello,
>
> I dont know if this is the right place to ask questions regarding vala. But
> anyway, ill post the question here just in case someone has the same
> experience i had while working with vala using signal from posix.
>
> Code:
>
> public class Check{
>  ...
>  public int x = 0;
>
>  public open(){
>    ...
>    signal(SIGUSR1, sighandler);
>  }
>  ...
>  public void sighandler(int signum) {
>    stdout.printf("%d", x++);
>  }
>  ...
> }
>
> How do we make our signal handlers access the global variables?
> i write a similar code in C, but works okay there.

The callback needed for signal() is a void -> void method, so there is
no way to pass a pointer to your class instance, and so no way for the
callback to invoke the method on the correct instance of the Check
class.

Using a static method and variable should work I assume.

-- 
Phil Housley