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IWETHEY Home / IWETHEY Board / Theory and Practice of Programming Forum / Futexes are tricky
Post #337,963
by crazy
1/2/11 6:22:50 AM
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New Futexes are tricky
http://www.google.co...yQJJspPgg&cad=rja
Post #337,964
by hnick
1/2/11 8:44:43 AM
Reply
New Thanks, that helps.
I'm going to have to read it a couple more times to completely absorb it, but that does help. Thanks again.
Post #338,701
by crazy
1/16/11 9:07:51 PM
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New Cursed as well
http://lxr.free-elec.../futex.c?v=2.6.29
Post #338,712
by hnick
1/17/11 8:07:47 AM
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New It appears that they deserve it.
They are apparently trying to avoid using system resources for some reason and rolling their own "lightweight" mutexes. They appear to be useless outside the process that generates them. I usually used mutexes to sync up operations in separate process and IPC functions. I would never have looked that futexes. Looks like reinventing an inferior wheel.
As they used to say on Laugh In, "very interesting... but stupid"
Post #337,967
by folkert
Picture of folkert
1/2/11 10:47:37 AM
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New Anything by Ulrich Drepper, makes my head hurt.
A lot of people don't like him. He is sort of like the OpenBSD guy in that respect.
Post #337,987
by static
Picture of static
1/2/11 6:06:48 PM
Reply
New Mutexes of any sort are tricky.
Q:Is it proper to eat cheeseburgers with your fingers?
A:No, the fingers should be eaten separately.
     appeal to the java gods - (boxley) - (12) - Dec. 30, 2010, 11:04:15 AM EST
         futex = fast userspace mutex. - (static) - Dec. 30, 2010, 05:53:25 PM EST
         You can't get rid of the time checks unless you want to - (crazy) - (9) - Dec. 31, 2010, 12:11:07 AM EST
             Re: You can't get rid of the time checks unless you want to - (hnick) - (6) - Dec. 31, 2010, 07:26:48 AM EST
                 Futexes are tricky - (crazy) - (5) - Jan. 2, 2011, 06:22:50 AM EST
                     Thanks, that helps. - (hnick) - (2) - Jan. 2, 2011, 08:44:43 AM EST
                         Cursed as well - (crazy) - (1) - Jan. 16, 2011, 09:07:51 PM EST
                             It appears that they deserve it. - (hnick) - Jan. 17, 2011, 08:07:47 AM EST
                     Anything by Ulrich Drepper, makes my head hurt. - (folkert) - Jan. 2, 2011, 10:47:37 AM EST
                     Mutexes of any sort are tricky. -NT - (static) - Jan. 2, 2011, 06:06:48 PM EST
             the coder doesnt have a clue - (boxley) - (1) - Dec. 31, 2010, 08:30:07 AM EST
                 It might be buried in a library he's using. - (static) - Dec. 31, 2010, 06:19:59 PM EST
         potential partial solution - (boxley) - Jan. 4, 2011, 12:25:34 PM EST

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