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Groups > comp.lang.java.programmer > #10677
| From | Roedy Green <see_website@mindprod.com.invalid> |
|---|---|
| Newsgroups | comp.lang.java.programmer |
| Subject | Re: Volatile keyword |
| Date | 2011-12-12 11:15 -0800 |
| Organization | Canadian Mind Products |
| Message-ID | <ddkce71iqujhrsrslsca33a5nep023c4si@4ax.com> (permalink) |
| References | <41fa02ff-3f20-41bc-90d9-c3f7d3651fbf@n6g2000vbg.googlegroups.com> <jc5ffc$28s$1@dont-email.me> |
On Mon, 12 Dec 2011 10:00:09 -0800, markspace <-@.> wrote, quoted or indirectly quoted someone who said : > >I don't like the word "lock" here because it implies something that >probably isn't happening. I think that volatile, even for long and >double, is specified to be much lighter weight than a lock. In a 64-bit java, there is nothing to do. 64-bit reads are atomic because the hardware is atomic. In 32 bit, there is an assembler instruction cmpxchg8b designed to let you implement a light weight atomic 64-bit read. -- Roedy Green Canadian Mind Products http://mindprod.com For me, the appeal of computer programming is that even though I am quite a klutz, I can still produce something, in a sense perfect, because the computer gives me as many chances as I please to get it right.
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Volatile keyword "raphfrk@gmail.com" <raphfrk@gmail.com> - 2011-12-12 04:51 -0800
Re: Volatile keyword Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2011-12-12 14:31 +0000
Re: Volatile keyword "raphfrk@gmail.com" <raphfrk@gmail.com> - 2011-12-12 06:52 -0800
Re: Volatile keyword Lew <lewbloch@gmail.com> - 2011-12-12 06:34 -0800
Re: Volatile keyword markspace <-@.> - 2011-12-12 10:00 -0800
Re: Volatile keyword Tom Anderson <twic@urchin.earth.li> - 2011-12-12 18:41 +0000
Re: Volatile keyword Patricia Shanahan <pats@acm.org> - 2011-12-12 11:43 -0800
Re: Volatile keyword Roedy Green <see_website@mindprod.com.invalid> - 2011-12-12 11:15 -0800
Re: Volatile keyword Robert Klemme <shortcutter@googlemail.com> - 2011-12-13 08:37 +0100
Re: Volatile keyword Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-12-12 23:54 -0800
Re: Volatile keyword Robert Klemme <shortcutter@googlemail.com> - 2011-12-14 19:39 +0100
Re: Volatile keyword Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2011-12-14 10:59 -0800
Re: Volatile keyword Patricia Shanahan <pats@acm.org> - 2011-12-14 11:00 -0800
Re: Volatile keyword Robert Klemme <shortcutter@googlemail.com> - 2011-12-14 22:35 +0100
Re: Volatile keyword Roedy Green <see_website@mindprod.com.invalid> - 2011-12-12 10:55 -0800
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