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Re: Sound in linux [message #44053 is a reply to message #44031]

Fri, 19 December 2014 14:45

rainbowsally is currently offline

rainbowsally
Messages: 29
Registered: December 2014

Promising Member

Hi Honza.

Quote:

There is no need for an invisible window. Just remember the pid returned from fork and call kill on it after the timeout is exceeded. In GUI apps, you can do this easily using SetTimeCallback().

Technically, you're right, but getting GUIs and the old terminal based linuxes is not so straight forward.

For example how could you get the PID without "waitpid()" or reading a return string from a system() call.

The calling app would hang so you'd never get a chance to shut it down.

A system call to an intermediate shell utility similar to kshell<N> is a much better alternative for a simple dialog bell of some sort.

Either it runs or it doesn't.

But I see now that the "invisible window" thing wouldn't work either. Not sure how this "shell" utility could be integrated into UPP. Maybe run the fork in another thread. Then I suppose that thread's binary image would be all that gets copied to memory.

It's going to take me a while to get up to speed here.

Thanks for UPP and this forum. Smile

Smile

-rs

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[Message index]

		Sound in linux By: rainbowsally on Tue, 16 December 2014 10:51
		Re: Sound in linux By: mirek on Wed, 17 December 2014 11:30
		Re: Sound in linux By: rainbowsally on Wed, 17 December 2014 18:54
		Re: Sound in linux By: mirek on Wed, 17 December 2014 19:56
		Re: Sound in linux (& generic launchers) By: rainbowsally on Thu, 18 December 2014 04:23
		Re: Sound in linux (& generic launchers) By: dolik.rce on Thu, 18 December 2014 06:35
		Re: Sound in linux By: rainbowsally on Fri, 19 December 2014 14:45
		Re: Sound in linux By: dolik.rce on Sun, 21 December 2014 21:04
		Re: Sound in linux By: rainbowsally on Mon, 22 December 2014 08:01
		Re: Sound in linux By: dolik.rce on Mon, 22 December 2014 09:56
		Re: Sound in linux By: rainbowsally on Tue, 23 December 2014 09:40
		Re: Sound in linux By: rainbowsally on Tue, 23 December 2014 13:32
		Re: Sound in linux By: Klugier on Tue, 23 December 2014 14:49
		Re: Sound in linux By: rainbowsally on Wed, 24 December 2014 04:40
		Re: Sound in linux By: mirek on Wed, 24 December 2014 12:27
		Re: Sound in linux By: Klugier on Wed, 24 December 2014 13:18
		Re: Sound in linux By: mirek on Wed, 24 December 2014 15:46
		Re: Sound in linux By: Klugier on Wed, 24 December 2014 16:30
		Re: Sound in linux By: mirek on Thu, 25 December 2014 10:48
		Re: Sound in linux By: Klugier on Thu, 25 December 2014 13:56
		Re: Sound in linux By: mirek on Thu, 25 December 2014 21:01
		Re: Sound in linux By: rainbowsally on Thu, 25 December 2014 13:57
		Re: Sound in linux By: Klugier on Thu, 25 December 2014 14:23

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