Re: [Vala] Question about a basic coroutine example

[Jürg Billeter <j bitron ch>]

On Thu, 2011-07-07 at 22:23 +0200, Luca Dionisi wrote:
> 2. The sleep function from posix, tells the O.S. to put to sleep the
> entire process, not just one function.
> If you want a function similar to "sleep" that acts in a cooperative
> manner you should create a function that goes something like this:
>
> async void coop_sleep(int s)
> {
>   int ms = s * 1000;
>   for (int i = 0; i < ms; i++)
>   {
>     Idle.add(coop_sleep.callback);
>     yield;
>     Posix.usleep(1000);
>   }
> }
>
> That is:
>  * put the entire process to sleep for small periods (1000
> microseconds = 1 millisecond)
>     you need this, otherwise you'll have a cpu hogging application
>  * pass the schedule (yield)
>  * repeat for the needed times, or until a certain time arrives.

It would be better to use something like this:

        Timeout.add (2000, foo1.callback);
        yield;

Regards,
Jürg