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Groups > comp.lang.java.programmer > #12970
| From | Jan Burse <janburse@fastmail.fm> |
|---|---|
| Newsgroups | comp.lang.java.programmer |
| Subject | Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? |
| Date | 2012-03-13 18:17 +0100 |
| Organization | albasani.net |
| Message-ID | <jjnvfe$jb2$1@news.albasani.net> (permalink) |
| References | (12 earlier) <jjm302$evr$1@news.albasani.net> <jjmd72$um8$1@dont-email.me> <jjnhji$lao$1@news.albasani.net> <4f5f67ab$0$289$14726298@news.sunsite.dk> <jjnte2$ees$1@news.albasani.net> |
Sorry its a solution by "Maxim Khitrov". So how does
the solution look like in Java?
I did some measurement with System.nanoTime(), which
is only available since JDK 1.5. It showed the
following:
There is in the average a delay of ~1 (ms)
between that readLine() returns EOF and
that the SIGINT handler is invoked.
So I opted for a Gabriel Genellina solution with a
threshold of EOF_SLEEP = 10 (ms). The code reads
as follows:
for(;;) {
String line = br.readLine();
INThappened = false;
if (line != null) {
return line;
} else {
long when = System.currentTimeMillis() + EOF_SLEEP;
long sleep = EOF_SLEEP;
while (sleep > 0) {
Thread.sleep(sleep);
sleep = when - System.currentTimeMillis();
}
if (!INThappened) {
return null;
}
}
}
I don't particularly like the solution, since
it might give false negatives. For example if
there is a really an EOF and in the same time
a SIGINT, the EOF might be suppressed.
The SIGINT handler is supposed to do as it
first statement:
INThappened = true;
I did the time measurement with Windows 7 / JDK
1.7 / Sony VAIO VPC-SA3J1E/XI. Maybe another
hardware / software might yield a different
estimate of the average delay. Also the delay
might depend on the system load.
So eventually EOF_SLEEP would need adjustment.
But it is below the 50ms that Maxim Khitrov
suggested:
http://www.gossamer-threads.com/lists/python/python/781893
But eventually should use ReentrantLock and
Condition with awaitNano() from java.concurrent,
since the Thread.sleep might anyway not deliver
the fine grained 10ms.
Bye
Jan Burse schrieb:
> Arne Vajhøj schrieb:
>> Joshua would have had implemented one of the proposed
>> solutions by know and moved on to next problem.
>
> I was faster, I implemented already Gabriel Genellina
> solution (see Link in my very first post) a couple
> of days ago.
>
> But maybe Joshua could share his solution, so that
> we could compare notes.
>
> Bye
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[Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-11 21:57 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-11 22:10 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-11 17:28 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-11 22:49 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-11 18:13 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-11 23:23 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-11 18:35 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? markspace <-@.> - 2012-03-11 15:51 -0700
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-12 10:58 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Lew <noone@lewscanon.com> - 2012-03-12 07:38 -0700
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-12 20:43 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 16:01 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Joshua Cranmer <Pidgeot18@verizon.invalid> - 2012-03-12 17:28 -0500
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 00:33 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Lew <lewbloch@gmail.com> - 2012-03-12 16:50 -0700
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 00:56 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 20:03 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 01:05 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 20:53 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 14:06 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 14:13 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-13 11:36 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 17:48 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 17:51 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-13 13:06 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 19:56 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 01:05 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Lew <lewbloch@gmail.com> - 2012-03-12 17:23 -0700
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 20:51 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Martin Gregorie <martin@address-in-sig.invalid> - 2012-03-13 02:33 +0000
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Patricia Shanahan <pats@acm.org> - 2012-03-12 20:39 -0700
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 14:17 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-13 11:38 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Joshua Cranmer <Pidgeot18@verizon.invalid> - 2012-03-12 21:59 -0500
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 14:20 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-13 11:28 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 17:42 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-13 13:16 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 18:17 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 18:19 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Silvio Bierman <silvio@moc.com> - 2012-03-12 16:21 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-12 20:35 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Robert Klemme <shortcutter@googlemail.com> - 2012-03-12 22:49 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Silvio Bierman <silvio@moc.com> - 2012-03-13 14:10 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 13:49 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-12 20:16 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Leif Roar Moldskred <leifm@dimnakorr.com> - 2012-03-12 14:42 -0500
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-12 20:46 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 16:09 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 16:07 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-12 21:27 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 16:52 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-12 22:39 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-12 17:56 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Robert Klemme <shortcutter@googlemail.com> - 2012-03-12 23:02 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 00:18 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 00:19 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Steven Simpson <ss@domain.invalid> - 2012-03-13 10:28 +0000
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 14:11 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-13 11:41 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 17:43 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-13 13:03 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 18:20 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-13 13:36 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Leif Roar Moldskred <leifm@dimnakorr.com> - 2012-03-13 12:42 -0500
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 18:51 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 18:51 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Arne Vajhøj <arne@vajhoej.dk> - 2012-03-13 19:53 -0400
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-14 01:21 +0100
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Steven Simpson <ss@domain.invalid> - 2012-03-13 17:26 +0000
Re: [Windows] Any way to distinguish ^C Induced EOF from ^Z EOF? Jan Burse <janburse@fastmail.fm> - 2012-03-13 18:44 +0100
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