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| From | markspace <-@.> |
| Newsgroups | comp.lang.java.programmer |
| Subject | Re: Volatile keyword |
| Date | Mon, 12 Dec 2011 10:00:09 -0800 |
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On 12/12/2011 4:51 AM, raphfrk@gmail.com wrote: > Effectively, does the CPU lock the entire 64-bits for the long when > doing the write update, and so other threads either seen the updated > value or the old value? 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. The spec that Lew referred to says they are "atomic" and doesn't mention "lock." I think of them that way, myself, in addition to "light weight" as opposed to the more heavy actual lock. volatile long === light weight & atomic. (=== here meant to mean "defined to be.")
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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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