[En-Nut-Discussion] Run once threads ?

[Ralph Mason]

The compiler can't see that this function doesn't return.

You can get rid of the warning with

THREAD(MyFunc,arg) {
    //DoStuff

    NutThreadExit();
    while(1);
}


Ralph

>
> In my application I sometimes need to fade in or fade out the volume 
> of a MP3 playback.
>
> I tried making these two functions for it :
>
> THREAD(FadeIn,arg)
> {
>   while (g_vol > 12)
>   {
>     vs1011_setvolume(g_vol,g_vol);
>     g_vol--;
>     NutSleep(10);
>   }
>   NutThreadExit();
> }
>
> THREAD(FadeOut,arg)
> {
>   while (g_vol < 250)
>   {
>     vs1011_setvolume(g_vol,g_vol);
>     g_vol++;
>     NutSleep(10);
>   }
>   NutThreadExit();
> }
>
> The fade is then activated by simply creating the appropriate thread, 
> which will run and then terminate itself when done.
> The thread memory will be released in the Idle task.
>
> This seems to work fine, and I have no memory leaks, BUT the compiler 
> complains about the THREAD functions, with a warning:
> warning: `noreturn' function does return
>
> Should I worry about this, or is it safe to run threads like this ?
>
> /Jesper
>
>
>
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