August 2006 - Boost - lists.boost.org

Re: [boost] Boost Units library preview
by Eric Lemings 22 Aug '06

22 Aug '06

> -----Original Message----- > From: boost-bounces(a)lists.boost.org > [mailto:boost-bounces@lists.boost.org] On Behalf Of Andy Little > Sent: Wednesday, August 16, 2006 7:46 AM > To: boost(a)lists.boost.org > Subject: Re: [boost] Boost Units library preview > > Hi Eric, > ... > > Tested in VC7.1 and VC8.0 of vthe two examples gave compile > errors. Testing in gcc 4.0 gave a failed assertion at runtime I assume you mean the measure_test. Try the following simple patch: *** units-preview/libs/units/test/measure_test.cpp.orig Thu Aug 17 10:50:15 2006 --- units-preview/libs/units/test/measure_test.cpp Thu Aug 17 10:52:27 2006 *************** *** 38,52 **** feet f1 (1); assert (f1.value () == 1); f1 = 3; ! assert (f1.value () == 3); feet f2 (2); length_quantity q2 (f2); q2 = f1; feet f3 (q2); ! assert (f3.value () == 3); f2 = q2; ! assert (f2.value () == 3); // mixed units --- 38,52 ---- feet f1 (1); assert (f1.value () == 1); f1 = 3; ! assert (f1.value() > 2.999 && f1.value() < 3.001); feet f2 (2); length_quantity q2 (f2); q2 = f1; feet f3 (q2); ! assert (f1.value() > 2.999 && f1.value() < 3.001); f2 = q2; ! assert (f1.value() > 2.999 && f1.value() < 3.001); // mixed units Eric.

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Re: [boost] Presentation of Boost.Process (SoC project)
by JOAQUIN LOPEZ MU?Z 22 Aug '06

22 Aug '06

----- Mensaje original ----- De: "Julio M. Merino Vidal" <jmmv84(a)gmail.com> Fecha: Miércoles, Agosto 16, 2006 5:31 pm Asunto: [boost] Presentation of Boost.Process (SoC project) > Hello, > > During the past two-three months Jeff Garland (as mentor) and I have > been working on the Boost Summer of Code project whose goal was to > implement a library to spawn and manage child processes. A little > introduction and a link to the source code can be found here: > > https://www.boost-consulting.com:8443/trac/soc/wiki/process > > But you'll probably want to go straight to the documentation which > includes, among many other information, a couple of tutorials and > multiple examples. I'm keeping an up-to-date snapshot at the > following URL: > > http://www.NetBSD.org/~jmmv/process/ > > If it wasn't for the imminent SoC deadline (next Monday), I wouldn't > present it just yet because there are still a couple of important > issues that I would like to see resolved as soon as possible: > > First is the lack of a "design decisions" chapter in the > documentation. This is not an extremely big issue because the Wiki > page linked above already contains many discussions on the library's > current design. In other words, that chapter will end up summarizing > the information in there and adding few new things. > > Second, and very important, is the "need" to integrate the library > with Boost.Asio to allow asynchronous management of communication > streams and process termination. Unfortunately it does not support > such asynchronous events yet, and integrating with Boost.Asio sounds > like a reasonable approach to cover this area. > > Anyway, I wouldn't like this to discourage you from taking a look at > the documentation and code. The library is already big enough to let > you get a general idea on its focus and design. You can start > criticising now! ;-) Sincerely, any constructive comments will be > certainly appreciated. > > Thank you. > Hello Julio, A cursory look at the docs shows this can be a very valuable contribution to Boost. Thank you for your effort! Although I plan to give a thorough review during the next week, let me advance a few issues: 1. The lib provides functionality to spawn child processes and examine them through launcher and child classes, respectively. Yet, it seems to lack functionality to examine the *current* process. In particular, it looks like one cannot get the handle_type of the current process (Win32:GetCurrentProcessID) in a manner compatible with child::get_handle. Would it be feasible to extend the lib to support this? In case it would, maybe it'd be a good idea then to rename "child" to a neutral "process", for instance, so that process classes are returned by laucher as well as by some potential "current_process" facility. 2. Would it be safe to guarantee that handle_type is an integral type? It is so at least for POSIX and Win32. This would allow the programmer to output handle_type's to std::ostreams's (for tracing purposes, for instance) and to use handle_type's in a number of scenarios, vg to store them in STL data structures. Joaquín M López Muñoz Telefónica, Investigación y Desarollo

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[xpressive] test2u/msvc-8.0/64 failures
by Vladimir Prus 22 Aug '06

22 Aug '06

Hello, current regression matrix says the above test fails. At the same time, it passes for 32-bit compiler. See http://tinyurl.com/qfgec for error message, which is: LINK : fatal error LNK1000: unknown error; consult documentation for technical support options Unless somebody has any ideas how to workaround this, maybe the failures should be marked as expected? Eric? - Volodya

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Re: [boost] Boost Units library preview
by Eric Lemings 22 Aug '06

22 Aug '06

> -----Original Message----- > From: Eric Lemings > Sent: Monday, August 21, 2006 10:58 AM > To: 'boost(a)lists.boost.org' > Subject: RE: [boost] Boost Units library preview > > > > > -----Original Message----- > > From: boost-bounces(a)lists.boost.org > > [mailto:boost-bounces@lists.boost.org] On Behalf Of Matthias Troyer > > Sent: Sunday, August 20, 2006 6:29 AM > > To: boost(a)lists.boost.org > > Subject: Re: [boost] Boost Units library preview > > > > > ... > > Wait, if I multiply quantities (which have units) then also > the result > > will have a unit. E.g. if I divide 10 meters by 2 seconds > then I get 5 > > m/s . I wouldn't call that anonymous since I know the > > unit: m/s > > This brings up a good question. Say you have two objects: > > meters m = 1; > feet f = 2; > > What is the type (or unit) of the following expression? > > m * f; Doh! This should be addition, not multiplication. m + f; Eric.

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Re: [boost] Boost Units library preview
by Eric Lemings 22 Aug '06

22 Aug '06

> -----Original Message----- > From: boost-bounces(a)lists.boost.org > [mailto:boost-bounces@lists.boost.org] On Behalf Of Andy Little > Sent: Monday, August 21, 2006 3:55 PM > To: boost(a)lists.boost.org > Subject: Re: [boost] Boost Units library preview > > > "Deane Yang" <deane_yang(a)yahoo.com> wrote in message > news:ecd87h$brg$1@sea.gmane.org... > > Eric Lemings wrote: > >>> This brings up a good question. Say you have two objects: > >>> > >>> meters m = 1; > >>> feet f = 2; > >>> > >>> What is the type (or unit) of the following expression? > >>> > >> m + f; > >> > > > > I apologize for repeating myself, but I want this to fail > to compile. > > I do not want implicit conversion of units. I believe I am not > > completely alone in this view. Could you provide your rationale for wanting expressions like this to fail? Maybe there is something we've overlooked? > Personally I love implicit unit conversions. :-) I'm inclined to agree. As long as the dimensions are correct and a.) the result type is the dimension of the unit, or b.) the programmer specifies the desired units, I don't see a problem with implicit conversions between quantities (measures, whatever) of compatible dimensions and units. Eric.

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[TR1] sun problems, OSVL4-V2
by Vladimir Prus 22 Aug '06

22 Aug '06

John, you reported previously that some TR1 tests fail on sun, which you suspected to be V2 issue. You said, specifically: A typical list of errors here: http://tinyurl.com/pcwf5 suggests that the "real" version of <memory> is getting included rather than the Tr1 version. The command line shows that the TR1 headers are in the path, but *after* the Boost include path, and while I'm not completely sure, I believe this is the problem On closer look, I think I don't understand what's going on. The "real" <memory> is in "standard" include directories, and that "standard" include directory is not present in command line at all. Even though boost include directory is present before TR1 include directory, I see no way how this can cause system <memory> to be preferred to TR1's <memory>. Could it be that the problem is somewhat more contrived? Doug, as a quick check, can you try running the same command that fails, but with the order of -I".." and -I"/home/user1/dgregor/BoostRegressionTesting/boost/boost/tr1/tr1" reversed? If that works, can you run the failing command with -save-temps, and send me the .ii file? Thanks, Volodya

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Re: [boost] Boost Units library preview
by Eric Lemings 22 Aug '06

22 Aug '06

> -----Original Message----- > From: boost-bounces(a)lists.boost.org > [mailto:boost-bounces@lists.boost.org] On Behalf Of Andy Little > Sent: Sunday, August 20, 2006 9:34 AM > To: boost(a)lists.boost.org > Subject: Re: [boost] Boost Units library preview > > ... > > Having had correspondence from various people, I am now > fairly sure that the Americans have a different concept of a > unit than (at least) Europeans. Well I don't presume to speak for all Americans but I define a "unit" as a standard of measure. Plain and simple. How do Europeans define it? Eric.

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[Boost-bugs] [ boost-Support Requests-1544410 ] Regex: multi-processor scalability, user-defined allocators
by SourceForge.net 22 Aug '06

22 Aug '06

Support Requests item #1544410, was opened at 2006-08-22 11:19 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=207586&aid=1544410&group_… Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: regex Group: None Status: Open Resolution: None Priority: 5 Submitted By: Roy (r_emek) Assigned to: John Maddock (johnmaddock) Summary: Regex: multi-processor scalability, user-defined allocators Initial Comment: I'm using boost-regex library, and I'm running into multi-threading scalability issues. When tested on a machine with several CPUs, my performance tests show improvement of about 60-70% when moving from a single thread to 2 threads. Question 1: Is anyone aware of this problem? Is there a known solution? >From some testing we've done, it seems that the cause of the scalability issue is problematic implementation of std:allocator. This is a known issue on some operating systems (e.g., Solaris 8). Some of the boost::regex classes (e.g., match_results) accept a user-defined allocator. However, as far as I can understand there's no way to completely override the use of std::allocator. Question 2: is there a way to completely prevent boost / regex from using std::allocator? If no, can such a capability be added? (One solution to this problem would be global overriding the 'new' and 'delete' operators - but for various reasons this cannot be done in the application I'm developing). ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=207586&aid=1544410&group_… ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Boost-bugs mailing list Boost-bugs(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/boost-bugs

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Visual Studio 2003 SP1 is now available...
by Kevin Wheatley 22 Aug '06

22 Aug '06

Available from http://msdn.microsoft.com/downloads/ Direct Link http://www.microsoft.com/downloads/details.aspx?FamilyID=69D2219F-CE82-46A5… 'release notes' http://www.microsoft.com/downloads/details.aspx?FamilyID=DC455C5D-2C99-43CC… There isn't much in terms of a list of bugs fixed at the moment, but I'm sure they will correct that. Lots more fun for everyone Kevin -- | Kevin Wheatley, Cinesite (Europe) Ltd | Nobody thinks this | | Senior Technology | My employer for certain | | And Network Systems Architect | Not even myself |

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Re: [boost] email client weirdness (was: Boost Units library preview)
by Eric Lemings 22 Aug '06

22 Aug '06

> -----Original Message----- > From: boost-bounces(a)lists.boost.org > [mailto:boost-bounces@lists.boost.org] On Behalf Of Janek Kozicki > Sent: Monday, August 21, 2006 2:24 PM > To: boost(a)lists.boost.org > Subject: Re: [boost] email client weirdness (was: Boost Units > library preview) > > Eric Lemings said: (by the date of Mon, 21 Aug 2006 > 13:39:49 -0600) > > > Doh! This should be addition, not multiplication. > > > > m + f; > > > > Eric. > > > Eric, please check your email client configuration with > respect to 'replying to posts' on this mailing lists. All > posts from you do not stack correctly with other posts to > form a thread. They all seem to be just a reply to the > toplevel post. That makes reading them a bit confusing. Unfortunately, I have no idea what the problem is or how to fix it. Would appreciate any help. Eric.

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