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From: Tom Tromey <tromey@cygnus.com>
To: "Boehm, Hans" <hans_boehm@hp.com>
Cc: "'Miles Sabin'" <msabin@cromwellmedia.co.uk>,
	java-discuss@sourceware.cygnus.com
Subject: RE: Thread.interrupt()
Date: Tue, 14 Mar 2000 10:52:00 -0000	[thread overview]
Message-ID: <200003141852.KAA04749@ferrule.cygnus.com> (raw)
In-Reply-To: <140D21516EC2D3119EE700902787664456E6F4@hplex1.hpl.hp.com>

Hans> It seems to me that there are a bunch of problems with leaving
Hans> out interruptable I/O:

I agree.  Also I don't see any text in the 1.3 online docs to indicate
that this is deprecated; depending on the bug parade seems suboptimal.

Hans> It seems to me that Thread.interrupt() should in fact be
Hans> implemented (on Posix platforms) using pthread_cancel, though it
Hans> may take some work on the pthreads side to make that fly.

I don't see how this can be done, because I don't see how you can stop
a cancellation in progress (eg, throwing an exception from a cleanup
handler is undefined behavior).  Bryce and I have been talking about
just implementing condition variables on our own for POSIX, since the
POSIX and Java models don't line up enough.  I'd love to be wrong
about this.

Tom

WARNING: multiple messages have this Message-ID
From: Tom Tromey <tromey@cygnus.com>
To: "Boehm, Hans" <hans_boehm@hp.com>
Cc: "'Miles Sabin'" <msabin@cromwellmedia.co.uk>,
	java-discuss@sourceware.cygnus.com
Subject: RE: Thread.interrupt()
Date: Sat, 01 Apr 2000 00:00:00 -0000	[thread overview]
Message-ID: <200003141852.KAA04749@ferrule.cygnus.com> (raw)
Message-ID: <20000401000000.qaIHNnqzYpdND_c8TIMccyn_wn07X5v5h1-w1suUvS0@z> (raw)
In-Reply-To: <140D21516EC2D3119EE700902787664456E6F4@hplex1.hpl.hp.com>

Hans> It seems to me that there are a bunch of problems with leaving
Hans> out interruptable I/O:

I agree.  Also I don't see any text in the 1.3 online docs to indicate
that this is deprecated; depending on the bug parade seems suboptimal.

Hans> It seems to me that Thread.interrupt() should in fact be
Hans> implemented (on Posix platforms) using pthread_cancel, though it
Hans> may take some work on the pthreads side to make that fly.

I don't see how this can be done, because I don't see how you can stop
a cancellation in progress (eg, throwing an exception from a cleanup
handler is undefined behavior).  Bryce and I have been talking about
just implementing condition variables on our own for POSIX, since the
POSIX and Java models don't line up enough.  I'd love to be wrong
about this.

Tom

  reply	other threads:[~2000-03-14 10:52 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2000-03-14  9:57 Thread.interrupt() Boehm, Hans
2000-03-14 10:52 ` Tom Tromey [this message]
2000-04-01  0:00   ` Thread.interrupt() Tom Tromey
2000-03-14 15:59 ` Thread.interrupt() Jesper Peterson
2000-04-01  0:00   ` Thread.interrupt() Jesper Peterson
2000-04-01  0:00 ` Thread.interrupt() Boehm, Hans
  -- strict thread matches above, loose matches on Subject: below --
2000-04-01  0:00 Thread.interrupt() Bryce McKinlay
2000-03-13 13:33 ` Thread.interrupt() Bryce McKinlay
2000-03-14  2:24   ` Thread.interrupt() Kresten Krab Thorup
2000-03-14  3:26     ` Thread.interrupt() Bryce McKinlay
2000-04-01  0:00       ` Thread.interrupt() Bryce McKinlay
2000-03-14  5:52     ` Thread.interrupt() Jeff Sturm
2000-03-14 11:02       ` Thread.interrupt() Tom Tromey
2000-04-01  0:00         ` Thread.interrupt() Tom Tromey
2000-03-14 14:16       ` Thread.interrupt() Bryce McKinlay
2000-03-14 16:09         ` Thread.interrupt() Godmar Back
2000-04-01  0:00           ` Thread.interrupt() Godmar Back
2000-04-01  0:00         ` Thread.interrupt() Bryce McKinlay
2000-04-01  0:00       ` Thread.interrupt() Jeff Sturm
2000-04-01  0:00     ` Thread.interrupt() Kresten Krab Thorup
2000-04-01  0:00   ` Thread.interrupt() Bryce McKinlay
2000-03-16  4:08 Thread.interrupt() Miles Sabin
2000-04-01  0:00 ` Thread.interrupt() Miles Sabin
2000-03-15 13:52 Thread.interrupt() Boehm, Hans
2000-04-01  0:00 ` Thread.interrupt() Boehm, Hans
2000-03-15 13:06 Thread.interrupt() Miles Sabin
2000-04-01  0:00 ` Thread.interrupt() Miles Sabin
2000-03-15 12:55 Thread.interrupt() Boehm, Hans
2000-04-01  0:00 ` Thread.interrupt() Boehm, Hans
2000-03-15 11:57 Thread.interrupt() Miles Sabin
2000-04-01  0:00 ` Thread.interrupt() Miles Sabin
2000-03-15 11:38 Thread.interrupt() Boehm, Hans
2000-04-01  0:00 ` Thread.interrupt() Boehm, Hans
2000-03-15  5:51 Thread.interrupt() Miles Sabin
2000-04-01  0:00 ` Thread.interrupt() Miles Sabin
2000-03-14 16:30 Thread.interrupt() Boehm, Hans
2000-03-14 17:17 ` Thread.interrupt() Jesper Peterson
2000-03-14 17:27   ` Thread.interrupt() Tom Tromey
2000-04-01  0:00     ` Thread.interrupt() Tom Tromey
2000-04-01  0:00   ` Thread.interrupt() Jesper Peterson
2000-04-01  0:00 ` Thread.interrupt() Boehm, Hans
2000-03-14 11:26 Thread.interrupt() Boehm, Hans
2000-04-01  0:00 ` Thread.interrupt() Boehm, Hans
2000-03-14  7:47 Thread.interrupt() Miles Sabin
2000-04-01  0:00 ` Thread.interrupt() Miles Sabin
2000-03-14  6:00 Thread.interrupt() Miles Sabin
2000-03-14  7:36 ` Thread.interrupt() Jeff Sturm
2000-03-14 10:58   ` Thread.interrupt() Tom Tromey
2000-04-01  0:00     ` Thread.interrupt() Tom Tromey
2000-04-01  0:00   ` Thread.interrupt() Jeff Sturm
2000-04-01  0:00 ` Thread.interrupt() Miles Sabin

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