[concurrency-interest] deadline and long overflow
davidcholmes at aapt.net.au
Wed Apr 20 06:22:15 EDT 2016
Doesn’t this “self-correct” when we do
nanos = deadline - System.nanoTime();
From: concurrency-interest-bounces at cs.oswego.edu [mailto:concurrency-interest-bounces at cs.oswego.edu] On Behalf Of Peter Veentjer
Sent: Wednesday, April 20, 2016 8:05 PM
To: concurrency-interest at cs.oswego.edu
Subject: [concurrency-interest] deadline and long overflow
I have a question regarding dealing with deadlines and long overflow.
For example the following from the SynchronousQueue:
final long deadline = timed ? System.nanoTime() + nanos : 0L;
What would happen if someone calls queue.offer(item, Long.MAX_VALUE, NANOS) then deadline overflows and becomes negative. I see the same approach in other parts e.g.
this.deadline = timed ? System.nanoTime() + nanos : 0L;
from the Phaser. Personally I like the simplicity; but my concern is regarding validity.
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