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Re: anyone else writing Linux (or cross-system) applications in PHP? [message #180301 is a reply to message #180295]

Mon, 04 February 2013 09:49

crankypuss
Messages: 147
Registered: March 2011

Karma:

Senior Member

On 02/04/2013 12:40 AM, Arno Welzel wrote:
> crankypuss, 2013-02-03 11:49:
>
>> On 02/02/2013 02:27 PM, Jonathan N. Little wrote:
> [...]
>>> Because for the web is where PHP originated. Get data, do something,
>>> done. Not really suited for event driven apps.
>>
>> I have code that says you're mistaken.
>
> In which way? How does your PHP code handle events without polling in an
> endless loop?
>
>

There's only two ways to handle repetitive events, interrupts and
polling. No modern operating system polls by using a hard spin-loop,
and no application that isn't a total piece of crap ever implements a
hard spin-loop without some kind of system-call that allows it to be set
aside while the processor services another thread. Whether your
application contains a loop that has a system-call in it, or is
rescheduled when an interrupt comes in, it's the same loop with its top
rolled around and a different subroutine used to put it to sleep. Hell,
even if your application is so stupid that it's just branching to here,
any modern operating system will time-swap it out and let somebody else
have a shot at the processor.

So the answer depends somewhat on how one interprets "even driven". All
applications are event driven unless they are just doing hard
computation, in/grind/out. The techniques one uses to make the
application do what's intended vary depending on details. In other
words it depends on what you want to do. Polling is not bad if done
properly, neither are interrupt-based mechanisms, look close enough and
they're basically the same thing.

As for PHP being "not really suited for event driven apps" that seems
kind of silly to me, but then most people think that calling ncurses to
get a character means their application will have to sit there waiting
until the ENTER key is pressed. Sure, the ncurses call is blocking, but
that doesn't mean you can't write a non-blocking subroutine that does
something that's blocking; only threads get blocked, big deal.

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[Message index]

		anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Sat, 02 February 2013 20:27
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: DanS on Sat, 02 February 2013 20:57
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Sun, 03 February 2013 10:45
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: DanS on Sun, 03 February 2013 12:00
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Jonathan N. Little on Sat, 02 February 2013 21:27
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Sun, 03 February 2013 10:49
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: The Natural Philosoph on Sun, 03 February 2013 11:00
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Jonathan N. Little on Sun, 03 February 2013 15:17
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Sun, 03 February 2013 18:40
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Jonathan N. Little on Sun, 03 February 2013 19:00
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Richard Yates on Sun, 03 February 2013 21:56
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Martin on Mon, 04 February 2013 00:53
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: The Natural Philosoph on Mon, 04 February 2013 02:40
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Tim Streater on Mon, 04 February 2013 09:14
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Mon, 04 February 2013 09:32
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Jonathan N. Little on Mon, 04 February 2013 16:06
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Mon, 04 February 2013 16:15
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: The Natural Philosoph on Mon, 04 February 2013 16:24
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Jonathan N. Little on Mon, 04 February 2013 16:35
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Tue, 05 February 2013 09:22
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: The Natural Philosoph on Tue, 05 February 2013 12:16
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Tue, 05 February 2013 18:49
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: The Natural Philosoph on Tue, 05 February 2013 21:22
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: J G Miller on Mon, 04 February 2013 16:38
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: M. Strobel on Mon, 04 February 2013 16:41
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: The Natural Philosoph on Mon, 04 February 2013 16:58
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Tue, 05 February 2013 09:21
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: The Natural Philosoph on Tue, 05 February 2013 12:15
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Tue, 05 February 2013 18:52
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: The Natural Philosoph on Tue, 05 February 2013 21:23
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Jasen Betts on Tue, 05 February 2013 06:00
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Arno Welzel on Tue, 05 February 2013 12:49
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Jerry Stuckle on Tue, 05 February 2013 13:22
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Cybe R. Wizard on Tue, 05 February 2013 14:50
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Arno Welzel on Mon, 04 February 2013 07:40
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Mon, 04 February 2013 09:49
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Robert Heller on Sat, 02 February 2013 21:43
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Sun, 03 February 2013 10:57
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Keith D. Lee on Sat, 02 February 2013 22:20
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Sun, 03 February 2013 11:13
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Jasen Betts on Mon, 04 February 2013 12:23
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Mon, 04 February 2013 15:57
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Arno Welzel on Tue, 05 February 2013 13:04
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Arno Welzel on Tue, 05 February 2013 12:59
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: M. Strobel on Sun, 03 February 2013 09:58
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Sun, 03 February 2013 11:20
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: J.O. Aho on Sun, 03 February 2013 11:44
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: The Natural Philosoph on Sun, 03 February 2013 11:50
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: J.O. Aho on Sun, 03 February 2013 12:47
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: The Natural Philosoph on Sun, 03 February 2013 13:23
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Jasen Betts on Mon, 04 February 2013 11:32
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Sun, 03 February 2013 18:43
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: J G Miller on Sun, 03 February 2013 13:08
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: M. Strobel on Sun, 03 February 2013 13:49
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: John Hasler on Sun, 03 February 2013 14:16
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Richard Kettlewell on Sun, 03 February 2013 15:28
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: John Hasler on Sun, 03 February 2013 15:39
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: M. Strobel on Sun, 03 February 2013 16:50
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: John Hasler on Sun, 03 February 2013 17:24
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: J G Miller on Sun, 03 February 2013 19:25
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Richard Kettlewell on Sun, 03 February 2013 20:25
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: J G Miller on Sun, 03 February 2013 21:47
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: John Hasler on Sun, 03 February 2013 22:32
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: The Natural Philosoph on Sun, 03 February 2013 22:59
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: J G Miller on Mon, 04 February 2013 00:21
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Jasen Betts on Mon, 04 February 2013 11:46
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Richard Kettlewell on Sun, 03 February 2013 23:13
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: M. Strobel on Mon, 04 February 2013 16:21
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: The Natural Philosoph on Mon, 04 February 2013 16:28
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: John Hasler on Sun, 03 February 2013 20:26
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Jasen Betts on Mon, 04 February 2013 11:37
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Tim Streater on Sun, 03 February 2013 13:17
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Arno Welzel on Mon, 04 February 2013 07:38
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Tim Streater on Mon, 04 February 2013 09:04
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Arno Welzel on Mon, 04 February 2013 09:29
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Tim Streater on Mon, 04 February 2013 09:34
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Mon, 04 February 2013 10:06
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Mon, 04 February 2013 10:01
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Mon, 04 February 2013 16:08
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: M. Strobel on Mon, 04 February 2013 16:34
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: J G Miller on Mon, 04 February 2013 16:44
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Tue, 05 February 2013 09:36
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Michael Vilain on Tue, 05 February 2013 09:49
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: J G Miller on Tue, 05 February 2013 15:03
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Tue, 05 February 2013 19:07
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: J G Miller on Tue, 05 February 2013 20:22
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Jasen Betts on Tue, 05 February 2013 22:27
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: J G Miller on Wed, 06 February 2013 00:06
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Wed, 06 February 2013 11:32
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Richard Kettlewell on Wed, 06 February 2013 11:50
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Wed, 06 February 2013 11:22
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: J G Miller on Wed, 06 February 2013 15:37
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Jasen Betts on Tue, 05 February 2013 22:13
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Richard Kettlewell on Tue, 05 February 2013 23:38
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Tue, 05 February 2013 09:26
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Tim Streater on Tue, 05 February 2013 10:31
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Arno Welzel on Tue, 05 February 2013 12:41
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Tim Streater on Tue, 05 February 2013 12:56
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Arno Welzel on Tue, 05 February 2013 13:08
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Tue, 05 February 2013 19:24
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: J G Miller on Tue, 05 February 2013 20:14
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Aragorn on Wed, 06 February 2013 05:27
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: DanS on Thu, 07 February 2013 01:48
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Cybe R. Wizard on Thu, 07 February 2013 04:44
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: GooseMan on Thu, 07 February 2013 05:38
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Arno Welzel on Thu, 07 February 2013 14:13
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: DanS on Sun, 10 February 2013 14:09
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Tue, 05 February 2013 19:10
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Jasen Betts on Tue, 05 February 2013 21:51
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: The Natural Philosoph on Tue, 05 February 2013 22:32
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Meeh on Tue, 05 February 2013 16:51
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Mon, 04 February 2013 09:55
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Arno Welzel on Tue, 05 February 2013 12:42
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: crankypuss on Tue, 05 February 2013 19:28
		Re: anyone else writing Linux (or cross-system) applications in PHP? By: Arno Welzel on Sat, 09 February 2013 19:58

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