[Caml-list] Re: Lwt and OCamlMakefile
On 21-12-2010, Jérémie Dimino jere...@dimino.org wrote: On Mon, Dec 20, 2010 at 09:36:39PM -0500, orb...@ezabel.com wrote: Thanks, I forgot to mention that I am setting that: (*pp camlp4o pa_lwt.cmo *) This one should work: (*pp camlp4o `ocamlfind query -i-format lwt` `ocamlfind query -predicates syntax,preprocessor -a-format -r lwt.syntax` *) It will work on Linux. On Windows, you will get a problem because ocamlfind EOL (win32) doesn't match `...` EOL wrapping (cygwin). There was a similar problem with sexplib... Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Pre-compiled ocaml binary for windows
Hello, On 07-12-2010, Alain Frisch al...@frisch.fr wrote: On 12/07/2010 01:24 AM, Sylvain Le Gall wrote: Here is the list so far: 1. no build system setup : Martin who first did the packaging, didn't have included how to build ocaml/findlib neither the binaries itself. So basically you need to build by hand to generate the .msi. This is not a big issue but for a collective effort it is better to have a common way to build the binaries 2. some environment variables are not set and make ocaml crash (AFAIR, we doesn't set OCAMLIB) 3. we don't ship the graphical toplevel 4. I am still not sure how to deal with ActiveTCL + OCaml (because of the ActiveTCL license) 5. Total lack of documentation Do you plan to support ocamlopt? If yes, the users will have to install a toolchain (at least, an assembler+linker). Mingw has the advantage of producing binaries that depend only on msvcrt.dll (available on any fresh Windows installation), not on a specific version of msvcr80.dll/msvcr90.dll. But Windows users might prefer to install a version of VS Express or a Windows SDK. We will provide ocamlopt (32/64 bits). But indeed, the toolchain can be an issue (esp. masm). I plan to use VS2008. Maybe the native Lexifi's amd64/x86 backend is a better option. If we are able to use this backend, we still have to use a linker ? Not building labltk seems ok. As for the graphical toplevel, I think there are some pending bugs (random crashes) with the current version under recent versions of Windows, so it's probably better not to include it. Some support for installing the emacs mode automatically and/or a version of ledit would be useful replacements. I didn't known this fact. This is another reason for not building labltk. Since I almost never use it, I don't think it will be a big loose. I will probably look for ledit (or lwt toplevel) which seems a better alternative to emacs (too heavy too install). Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: help with regular expression
On 06-12-2010, David Allsopp dra-n...@metastack.com wrote: zaid Khalid wrote: Hint I am using (Str.regexp) There are other libraries (e.g. pcre-ocaml) which provide different (I would say more powerful, rather than strictly better!) implementations. There is also syntax extension like mikmatch, that helps to write regexp in a very meaningful syntax: match str with | RE bol a* | ab* eol - true | _ - false http://martin.jambon.free.fr/mikmatch-manual.html http://martin.jambon.free.fr/mikmatch.html You can use pcre and str with mikmatch. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Pre-compiled ocaml binary for windows
Hello, On 06-12-2010, Damien Doligez damien.doli...@inria.fr wrote: Hello, On 2010-12-03, at 21:06, José Romildo Malaquias wrote: Hello. I am looking for a binary release of the latest ocaml compiler for Windows. From the OCaml home page I can find only an older version (3.11.0). Where can I find the latest version? It depends on which port you want. For Cygwin, there is an up-to-date cygwin package. For the other ports, we are looking for volunteers to compile and publish the binaries. There is a start a .msi packaging of OCaml + flexdll + findlib: https://forge.ocamlcore.org/projects/ocaml-installer/ http://hg.ocamlcore.org/cgi-bin/hgwebdir.cgi/ocaml-installer/ocaml-installer/ There are still problem and we are lacking a bit of time to finish it. But hopefully, it will be finished one day. If anyone have time/knowledge, we will be happy if he joins the OCaml Windows Installer project. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
Re: [Caml-list] Re: oasis
Hello, On Mon, Nov 29, 2010 at 10:46:22PM +0300, Anastasia Gornostaeva wrote: On Sun, Nov 28, 2010 at 05:17:35PM +, Sylvain Le Gall wrote: My current state about this solution is: - defines BuildDepends: freetype2 (pkg-config), to make clear that there is a C build-depends - allow to override the defined variable freetype2_cflags and freetype2_libs. If they are both defined by user, don't even call pkg-config for this package There should be three variants: pkg-config, OS-based userspace policy (/usr/include vs. /usr/local/include) and user-defined one. I think the pkg-config is the starting point, it also defines the prefix of the setup.data variable that we will use. For you OS-based detection, I can propose a header(XXX), lib(XXX). This will be cumulative (i.e. you can define several header and lib). Example: BuildDepends: freetype2(pkg-config, header(freetype/freetype.h), lib(freetype), = 2.0.4), oUnit The headers and libs fields are extra methods. If you define them, we will try to find a set of -Idirs that help to find the matching headers or a -Ldirs to find the matching libs. We will only do a detection using Sys.file_exists (i.e. don't try to link or anything similar). The detection method start with pkg-config and if it fails goes to headers/libs. Here is a new proposal about this: - use a PostConfigureCommand to invoke a shell script freetype2.sh - in freetype2.sh invoke freetype-config and output flags in setup.data using echo 'freetype2_cflags = $output' setup.data' and echo 'freetype2_libs = $output' setup.data' - add in _tags a src/toto.cma: pkg_config_freetype2 - add in myocamlbuild.ml a tag [pkg_config_freetyp2; compile; ocaml] [... (* load the content of freetyp2_cflags *) ... ] This is not simple but this is probably what I will do for the support of C libraries in 0.3.0. But it is the best solution now and partially works for me. And please make the functions that loads setup.data and var_get data from it to be public. Right now I attempt to play with your code in myocamlbuild.ml and re-use it in my piece at bottom of the file. I'm always ready to test/use oasis from darcs when you put there something new. I not that down, I'll ping you ASAP. Cheers Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: oasis
On 27-11-2010, Anastasia Gornostaeva erm...@ermine.pp.ru wrote: On Sat, Nov 27, 2010 at 10:20:38AM +, Sylvain Le Gall wrote: Hi, On 26-11-2010, Anastasia Gornostaeva erm...@ermine.pp.ru wrote: Hello. How can I substitute in setup.ml (not in _oasis file) values for CCOpt and CCLib fields? I think it is better to substitute them from setup.data, if I could to put proper values to setup.data. For example: CCOpt: $freetype_ccopt and put to setup.data output of `freetype-config --clib` for field freetype_ccopt. As I answer you in private: there will be pkg-config support in 0.3.0. This will solve this issue, at least. (e.g. you will be able to define: BuildDepends: freetype2 (pkg-config), oUnit, ...) Sorry, but i didnt receive your mail.. I resent it, but it doesn't contains the ultimate solution, just what I said here. And pkg-config probably is not best solution on bsd and macosx systems because it does not guarante nothing. The best (and common) solution is CFLAGS and LIBS env variables. :-) Or this pkg-config will allow custom paths for those C librares that do not depend on pkg-config at concrete systems? [...] My current state about this solution is: - defines BuildDepends: freetype2 (pkg-config), to make clear that there is a C build-depends - allow to override the defined variable freetype2_cflags and freetype2_libs. If they are both defined by user, don't even call pkg-config for this package I need a way to substitute paths. A last solution, you can apply right now, is to override this call: let () = setup ();; (last line of setup.ml) by let f pkg = (* Call freetype-config and add flags where needed in pkg *) ... let () = BaseSetup.setup (f setup_t);; Interesting way. Thanks, I'll ckeck it right how. As you state privately, this indeed has also problem because you also need to do it in myocamlbuild.ml. Here is a new proposal about this: - use a PostConfigureCommand to invoke a shell script freetype2.sh - in freetype2.sh invoke freetype-config and output flags in setup.data using echo 'freetype2_cflags = $output' setup.data' and echo 'freetype2_libs = $output' setup.data' - add in _tags a src/toto.cma: pkg_config_freetype2 - add in myocamlbuild.ml a tag [pkg_config_freetyp2; compile; ocaml] [... (* load the content of freetyp2_cflags *) ... ] This is not simple but this is probably what I will do for the support of C libraries in 0.3.0. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: oasis
Hi, On 26-11-2010, Anastasia Gornostaeva erm...@ermine.pp.ru wrote: Hello. How can I substitute in setup.ml (not in _oasis file) values for CCOpt and CCLib fields? I think it is better to substitute them from setup.data, if I could to put proper values to setup.data. For example: CCOpt: $freetype_ccopt and put to setup.data output of `freetype-config --clib` for field freetype_ccopt. As I answer you in private: there will be pkg-config support in 0.3.0. This will solve this issue, at least. (e.g. you will be able to define: BuildDepends: freetype2 (pkg-config), oUnit, ...) The expected alternative way: $ocaml setup.ml -build --override 'library(library-name).CCOpt' `freetype-config --clib` does not work, too. The override stuff only works for defined runtime variables (ocamlc, ocamlopt...). I need a way to substitute paths. A last solution, you can apply right now, is to override this call: let () = setup ();; (last line of setup.ml) by let f pkg = (* Call freetype-config and add flags where needed in pkg *) ... let () = BaseSetup.setup (f setup_t);; Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Is OCaml fast?
Hello, On 22-11-2010, Thanassis Tsiodras ttsiod...@gmail.com wrote: I apologize beforehand if this is not the forum to ask. I am on the fence about whether to learn OCaml or not, and while reading an article called Why OCaml (http://www.cs.ubc.ca/~murphyk/Software/Ocaml/why_ocaml.html), I saw that OCaml was praised for the speed of the executables it generates - and was referred to, speed-wise, as second to none, except C and C++. However, when I actually went to the Language Shootout page suggested in the article, I found out that OCaml is not 2nd, it is 13th, behind languages like Haskell and C#... (http://shootout.alioth.debian.org/u32/which-programming-languages-are-fastest.php) Shootout benchmarks doesn't always allow to set some variables that could greatly improve the speed of OCaml. Is it just hype, then? Or am I missing something? You could write very fast application with OCaml -- even beating C code in some case. But what OCaml is really helpful for, is that you can do algorithmic optimizations that improve the speed. It means that OCaml is terse enough to allow you to write complex algorithm without making too much bugs. All in all: development time + execution time is fast. But if you spend 10x development time on the same C code, you will obviously get something faster in C. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] [was: Re: Is OCaml fast?] OCaml Shootout task force
On 22-11-2010, Gerd Stolpmann i...@gerd-stolpmann.de wrote: Am Montag, den 22.11.2010, 15:21 +0200 schrieb Thanassis Tsiodras: I apologize beforehand if this is not the forum to ask. I am on the fence about whether to learn OCaml or not, and while reading an article called Why OCaml (http://www.cs.ubc.ca/~murphyk/Software/Ocaml/why_ocaml.html), I saw that OCaml was praised for the speed of the executables it generates - and was referred to, speed-wise, as second to none, except C and C++. However, when I actually went to the Language Shootout page suggested in the article, I found out that OCaml is not 2nd, it is 13th, behind languages like Haskell and C#... (http://shootout.alioth.debian.org/u32/which-programming-languages-are-fastest.php) Is it just hype, then? Or am I missing something? I think the shootout is not a good data source. There are definitely some very poor Ocaml results there, so I'd guess the shootout got recently more attention by enthusiasts of other languages, and the current Ocaml programs there are not very good. (I remember Ocaml was #1 at the shootout a few years ago, faster than C.) So maybe a good opportunity to post better Ocaml solutions there? Maybe it is time to join forces and update the shootout for OCaml? If some people are interested here, I can setup a repository on the forge to update all this tests. If I get 2 people interested, I will setup a VCS repository + project on the forge, this afternoon. Drop me an email + preferred VCS (among svn, git, darcs) and your account login on http://forge.ocamlcore.org. I will take care, when ready, to made this code available in the shootout once finished. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Optimizing garbage collection
On 22-11-2010, Damien Doligez damien.doli...@inria.fr wrote: On 2010-11-21, at 20:26, Eray Ozkural wrote: I've been thinking whether some kind of doubling strategy would work for the minor heap size. What do you think? Sounds like an interesting idea, but what heuristic would you use? When everything is smooth, the running time decreases something like exponentially with the minor heap size, so you'd always want to increase the size. How do you tell when to stop? And then, if the program is not behaving uniformly, when do you decide to reduce the size? How do you tell when to stop? - Maybe you can stop when you reach (the size of the L2/L3 cache of the processor) / number of core. Both information are quite straight to read from /proc/cpuinfo. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: [Was: OCamlJit 2.0]
On 20-11-2010, Yoann Padioleau pada...@wanadoo.fr wrote: On Nov 20, 2010, at 9:08 AM, Jon Harrop wrote: Do we have example of big companies porting their whole codebase to another language ? Yes, of course. Companies modernise all the time. We have a client who just started porting 1MLOC of C++ to F#. How they do that ? Are they using compiler frontends to assist them in automatically translating part of the code to F# ? I worked for Metaware (http://www.metaware.fr). This company does source to source migration of COBOL code. We also tried once to do COBOL to Java translation using internal tools... It works, but probably not the way you expect... Or maybe the same way obrowser works in fact: you create a VM that interpret something in between COBOL and Java. You loose comments and meanings in between. The result is 100% unmaintainable/unreadable and at least 2x bigger. We stopped this kind of migration, because the result was not exactly great (but it works). It happens all the time but it is even more likely to happen as a consequence of multicore. I doubt an old code, not written with multicore in mind is easily portable to multicore. So basically, the migration you are talking about is starting a new project that will replace one software/library by another. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Looking for stubs for sendmsg/recvmsg
On 20-11-2010, Goswin von Brederlow goswin-...@web.de wrote: Sylvain Le Gall sylv...@le-gall.net writes: On 19-11-2010, Goswin von Brederlow goswin-...@web.de wrote: Sylvain Le Gall sylv...@le-gall.net writes: On 19-11-2010, Goswin von Brederlow goswin-...@web.de wrote: Sylvain Le Gall sylv...@le-gall.net writes: On 18-11-2010, Goswin von Brederlow goswin-...@web.de wrote: The best example about this: you cannot delete a file that has an FD still open on it. This makes harder to remove temporary file (and this piece of code was precisely made to track FD on temporary files, that let 1000s of unremoved temp file). Regards, Sylvain Le Gall Which again speaks for my solution. The leaked FD will be closed much faster (before the program terminates) and one can remove the tempfiles while the program is still running. I think, this totally off-topic. But anyway, when a program create a temporary files it needs to remove ASAP, itself. I wouldn't deliver a program with a notice like sometimes FD leaked, not a problem, just remove $TMP/myprogram-*. For the little story, the leaked FD (hence the temporary files) was 400MB each and it quickly get noticed after a few run (and a full HD). Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Looking for stubs for sendmsg/recvmsg
On 18-11-2010, Goswin von Brederlow goswin-...@web.de wrote: Hi, I'm looking for stubs for ssize_t sendmsg(int sockfd, const struct msghdr *msg, int flags); ssize_t recvmsg(int sockfd, struct msghdr *msg, int flags); Specifically I need those to send (among normal messages) an Unix.file_descr over a Unix Domain Socket. Does anyone know of a module that has them? If you don't find one and plan to write it yourself, this would be a good addition to extunix: http://extunix.forge.ocamlcore.org Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: ocamlbuild and packs
On 18-11-2010, Thomas Gazagnaire thomas.gazagna...@inria.fr wrote: Hi all, I've got a source tree with the following patterns : A/a.ml (defines 'let x = 1') B/a.ml (use A.x and defines 'let y = 2') B/b.ml B/b.mlpack (contains 'A B') C/a.ml (use A.x) C/b.ml (use B.A.y) C/c.mlpack (contains 'A B') Is there any way with ocamlbuild to build that tree (if possible using only _tags files, but if not I would be happy to have at least a solution :-) ? You can try to start building A/a.mlpack and use the generated library in other libraries. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Looking for stubs for sendmsg/recvmsg
Hello, On 19-11-2010, Goswin von Brederlow goswin-...@web.de wrote: Sylvain Le Gall sylv...@le-gall.net writes: On 18-11-2010, Goswin von Brederlow goswin-...@web.de wrote: Hi, I'm looking for stubs for ssize_t sendmsg(int sockfd, const struct msghdr *msg, int flags); ssize_t recvmsg(int sockfd, struct msghdr *msg, int flags); Specifically I need those to send (among normal messages) an Unix.file_descr over a Unix Domain Socket. Does anyone know of a module that has them? If you don't find one and plan to write it yourself, this would be a good addition to extunix: http://extunix.forge.ocamlcore.org Regards, Sylvain Le Gall I'm thinking of changing Unix.file_descr from int to a custom block (containing the FD) with finalizer. Unix.close would set the FD to -1 and the finalizer gives an error if FD != -1 and closes it. Actually I want that tunable with 3 possible behaviours: type fd_leak_mode = Silent | Complain | Fail val set_leak_mode : fd_leak_mode - unit = fun Silent just closes the FD if it is still open, Complain (default) outputs to stderr and closes it and Fail aborts. That would change most of the Unix module and mean a complete fork of it. Not that much, if you proceed in another way. I think what you are looking for is a fd leak detector? Here is a small modules that I have written for this purpose: File UnixExt.ml: (** Count open/close call *) IFNDEF NDBUG THEN let fd_opened = Hashtbl.create 13 ;; let fd_once_opened = Hashtbl.create 13 ;; let fd_open fd fn out = dbug_print (fun () - Printf.sprintf %s '%s' (if out then open-out else open-in) fn); Hashtbl.add fd_opened fd (fn, out) ;; let fd_close fd = try let (fn, out) as data = Hashtbl.find fd_opened fd in dbug_print (fun () - Printf.sprintf %s '%s' (if out then close-out else close-in) fn); Hashtbl.add fd_once_opened fd data; Hashtbl.remove fd_opened fd; with Not_found - begin dbug_print (fun () - let fn = try fst (Hashtbl.find fd_once_opened fd) with Not_found - unknown in Printf.sprintf Trying to close %s again fn) end ;; let () = at_exit (fun () - let exit_error = ref false in Hashtbl.iter (fun fd (fn, out) - if fd Unix.stdin fd Unix.stdout fd Unix.stderr then begin Printf.eprintf Not closed '%s' (out: %b)\n fn out; exit_error := true end) fd_opened; Hashtbl.clear fd_opened; if !exit_error then exit 3 ) ;; let opened_files () = let lst = ref [] in Hashtbl.iter (fun _ e - lst := e :: !lst) fd_opened; List.sort compare !lst; ELSE let fd_open _ _ _ = () ;; let fd_close _ = () ;; let opened_files () = [] ;; ENDIF (** See UnixExt.mli *) let to_file_descr_in fd = fd_open fd converted false; fd ;; (** See UnixExt.mli *) let to_file_descr_out fd = fd_open fd converted true; fd ;; (** See UnixExt.mli *) let close_in fd = Unix.close fd; fd_close fd ;; (** See UnixExt.mli *) let stdout = fd_open Unix.stdout stdout true; Unix.stdout ;; [...override other functions that open/close fd...] Then in the modules using this features, you just have to open UnixExt after Unix... You can even probably design a library that will transparently hide Unix with a custom Unix module providing this feature. Would that be something for extunix too? I don't think so. At least, this is not currently the purpose of extunix... Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Looking for stubs for sendmsg/recvmsg
On 19-11-2010, Goswin von Brederlow goswin-...@web.de wrote: Sylvain Le Gall sylv...@le-gall.net writes: On 19-11-2010, Goswin von Brederlow goswin-...@web.de wrote: Sylvain Le Gall sylv...@le-gall.net writes: On 18-11-2010, Goswin von Brederlow goswin-...@web.de wrote: Not that much, if you proceed in another way. I think what you are looking for is a fd leak detector? Here is a small modules that I have written for this purpose: File UnixExt.ml: (** Count open/close call *) [...] [...override other functions that open/close fd...] Then in the modules using this features, you just have to open UnixExt after Unix... You can even probably design a library that will transparently hide Unix with a custom Unix module providing this feature. Much less usefull. Using a custom block with finalizer means that the FD will be closed relative close to where/when it was leaked. Makes it easier to find where it was leaked and adding GC.compact calls at strategic locations can narrow it down even more. Leaking FDs also becomes much less serious. The GC will clean them up and close them. So you can use an app that leaks FDs just fine. It all depends on what you want: fix your program that leaks or live with it. The former piece of code helps to fail if there are leaked FD. On Unix FD leaks is not that problematic, but on Windows it turns to be another problem. The best example about this: you cannot delete a file that has an FD still open on it. This makes harder to remove temporary file (and this piece of code was precisely made to track FD on temporary files, that let 1000s of unremoved temp file). Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: SMP multithreading
On 17-11-2010, Goswin von Brederlow goswin-...@web.de wrote: Sylvain Le Gall sylv...@le-gall.net writes: Hi, On 15-11-2010, Wolfgang Draxinger wdraxinger.maill...@draxit.de wrote: Hi, I've just read http://caml.inria.fr/pub/ml-archives/caml-list/2002/11/64c14acb90cb14bedb2cacb73338fb15.en.html in particular this paragraph: | What about hyperthreading? Well, I believe it's the last convulsive | movement of SMP's corpse :-) We'll see how it goes market-wise. At | any rate, the speedups announced for hyperthreading in the Pentium 4 | are below a factor of 1.5; probably not enough to offset the overhead | of making the OCaml runtime system thread-safe. This reads just like the 640k ought be enough for everyone. Multicore systems are the standard today. Even the cheapest consumer machines come with at least two cores. Once can easily get 6 core machines today. Still thinking SMP was a niche and was dying? Hyperthreading was never remarkable about performance or whatever and is probably not pure SMP (emulated SMP maybe?). Hyperthreading is a hack to better utilize idle cpu sub units. The CPU has multiple complete sets of registers, one per hyper thread. Execution of the threads is interleaved. Now when one thread is doing some floating point operation the cpu switches over to another thread and lets it do some integer aritmetic. But that assumes the threads are using different sub units. If they are using the same unit then they just block each other and no speedup occurs. The speedup of hyperthreading is purely from avoiding dead cycles when one thread waits for something. On te other hand the cache is shared between threads so per thread it is smaller and more easily trashed. Hyperthreading can be much slower too. Indeed, the HT extension was designed to reduce pipeline bubbles, which most of the time occurs when you need to load data from a slow memory (slow = RAM as opposed to L1/L2 cache). In the old time of my P4, ocaml was performing quite well on the processor. One story about it: while compiling cameleon on it, I often get into thermal warning (the CPU was overheating). I think it could have been related to the fact the CPU idle level was very low (e.g. no pipeline bubble). I always thought that this was related to the fact the minor heap can be stored inside the cache and that reduces the hit/miss factor (i.e. avoid fetching data in RAM). I have never really tested this hypothesis. Maybe you can tell me your opinion about this? Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Native toplevel? (was: OCamlJit 2.0)
On 17-11-2010, Alain Frisch al...@frisch.fr wrote: On 11/16/2010 03:52 PM, Benedikt Meurer wrote: OCamlJit 2.0 was specifically designed for desktop processors and is not really portable to anything else in its current shape, because the target audience are people using the interactive top-level and the byte-code interpreter for rapid prototyping/development This looks like a very interesting project! Does performance really matter that much for rapid prototyping/development? I can imagine other uses of the toplevel where performance matters more, like theorem provers embedded in the OCaml toplevel. OASIS generates a setup.ml that is interpreted using the toplevel. Maybe, a native toplevel can enhance the speed of this process (it takes less than 1 second to run). http://oasis.forge.ocamlcore.org Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: SMP multithreading
Hi, On 15-11-2010, Wolfgang Draxinger wdraxinger.maill...@draxit.de wrote: Hi, I've just read http://caml.inria.fr/pub/ml-archives/caml-list/2002/11/64c14acb90cb14bedb2cacb73338fb15.en.html in particular this paragraph: | What about hyperthreading? Well, I believe it's the last convulsive | movement of SMP's corpse :-) We'll see how it goes market-wise. At | any rate, the speedups announced for hyperthreading in the Pentium 4 | are below a factor of 1.5; probably not enough to offset the overhead | of making the OCaml runtime system thread-safe. This reads just like the 640k ought be enough for everyone. Multicore systems are the standard today. Even the cheapest consumer machines come with at least two cores. Once can easily get 6 core machines today. Still thinking SMP was a niche and was dying? Hyperthreading was never remarkable about performance or whatever and is probably not pure SMP (emulated SMP maybe?). So, what're the developments regarding SMP multithreading OCaml? There are various development regarding this subject (most recent first): - Plasma (MapReduce in OCaml) http://plasma.camlcity.org/plasma/index.html - OC4MC (OCaml for MultiCore) http://www.algo-prog.info/ocmc/web/ - ocamlp3l http://camlp3l.inria.fr/eng.htm - jocaml http://jocaml.inria.fr/ - ocamlmpi http://forge.ocamlcore.org/projects/ocamlmpi/ All these projects try to tackle the challenge of SMP from different point of view. Maybe you'll find what your answer in one of them. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Type Safety comes to the iPad
Hello, On 09-11-2010, Jonathan Kimmitt jonat...@kimmitt.co.uk wrote: I thought you might be interested to know that my new OCAML App for the iPad was published on the iTunes Store yesterday. I believe this is a significant achievement given the notorious reluctance of Apple to embrace languages other than C/obj-C/C++ and I would hope it would promote wider dissemination of type safety. The real win would be if the new paradigm was accepted for teaching the new generation of students etc, which would require greater acceptance by potential employers which is a bit of a chicken/egg scenario. Anyway I am inordinately proud of my new publication and if you know anybody who has an iPad, please let them know about it. http://itunes.apple.com/app/ocamlexample/id396515573?mt=8# Congratulation, this is a really nice work. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Help with Elliom syntax
Hello, On 04-11-2010, Till Crueger till.crue...@gmx.net wrote: Hi, I am still trying to find my way with Elliom and Ocsigen. Right now I can use OCaml to generate the pages I want, but I still have problems to figure out how to encode the XHTML. The main question I have is how to assign attributes to elements, like div blocks or others. I found the a_id functions that should return an id object, but I have not figured out how to use it to actually assign the id. Most of the time you have an ~a parameter. Example: div ~a:[a_class [statistics]] [ h2 [pcdata Statistics]; ... ] Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Help with Elliom syntax
Hello,
On 04-11-2010, Till Crueger till.crue...@gmx.net wrote:
On Thu, 04 Nov 2010 13:31:35 +0100, Sylvain Le Gall sylv...@le-gall.net
wrote:
Most of the time you have an ~a parameter.
Example:
div ~a:[a_class [statistics]] [ h2 [pcdata Statistics]; ... ]
Thanks for the help again.
Is there a place where such things are documented? Because I was not able
to figure out how to do this using the Elliom developer manual.
Well, you have to figure how nullary/.../star works.
http://ocsigen.org/docu/1.3.0/XHTML.T.html#TYPEnullary
All is in the type ;-)
E.g. for nullary
type ('a, 'b) nullary = ?a:'a attrib list - unit - 'b elt
and
val br : ([ core ], [ `Br ]) nullary
and
type core = [ `Class | `Id | `Title ]
So you know that br accept only a_class, a_id and a_title...
I would recommend you to learn by examples, because ocsigen is a big
application and can be pretty hard to learn. There are already good
websites around:
https://github.com/mfp/ocsiblog
http://darcs.ocamlcore.org/cgi-bin/darcsweb.cgi?r=oasis-db;a=tree
http://ocsigen.org/ocsimore/sources/
Regards,
Sylvain Le Gall
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[Caml-list] Re: type inference problem with Printf.sprintf ?
Hello, On 03-11-2010, Gregory Bellier gregory.bell...@gmail.com wrote: What's the point to rely on another lib while the standard lib Unix is enough for this simple task? I don't know calendarLib, that's why I ask. But it relies on Unix and Sys anyway so maybe it's better to just use Unix. Calendar (http://calendar.forge.ocamlcore.org/) or CalendarLib helps you to deal with a lot of details concerning date. Unix is enough, if you just want the number of seconds between start and stop of a function. If you want to count weeks or days, you should use Calendar. 2010/10/27 Richard Jones r...@annexia.org On Wed, Oct 27, 2010 at 08:44:10AM +1100, Arlen Cuss wrote: # open CalendarLib;; # Calendar.now ();; - : CalendarLib.Calendar.t = abstr # Printer.Calendar.print %d/%m/%Y %H:%M:%S\n (Calendar.now ());; 26/10/2010 21:43:43 - : unit = () Even better, use the internationally standardized format for dates: # Printer.Calendar.print %F %T\n (Calendar.now ()) ;; 2010-10-27 11:28:59 - : unit = () Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Generalized Algebraic Datatypes
On 31-10-2010, Wojciech Daniel Meyer wojciech.me...@googlemail.com wrote: bluestorm bluestorm.d...@gmail.com writes: It was actually the case in Caml Light : each datatype constructor implicitly declared a constructor function with the same name. I don't exactly know why this feature was dropped in Objective Caml, but I think I remember (from a previous discussion) that people weren't sure it was worth the additional complexity. Would that be not possible now with Camlp4 extension? I am pretty sure, it is possible to implement them with camlp4. Just a matter of time -- and motivation. The only limitation I can see, is that the generated constructors won't be capitalized. E.g.: type t = MyConstr | YourConstr of int = type t = MyConstr | YourConstr of int let myConstr = MyConstr let yourConstr i = YouConstr i Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Generalized Algebraic Datatypes
On 31-10-2010, Lukasz Stafiniak lukst...@gmail.com wrote: On Sun, Oct 31, 2010 at 3:35 PM, Sylvain Le Gall sylv...@le-gall.net wrote: On 31-10-2010, Wojciech Daniel Meyer wojciech.me...@googlemail.com wrote: bluestorm bluestorm.d...@gmail.com writes: It was actually the case in Caml Light : each datatype constructor implicitly declared a constructor function with the same name. I don't exactly know why this feature was dropped in Objective Caml, but I think I remember (from a previous discussion) that people weren't sure it was worth the additional complexity. Would that be not possible now with Camlp4 extension? I am pretty sure, it is possible to implement them with camlp4. Just a matter of time -- and motivation. The only limitation I can see, is that the generated constructors won't be capitalized. E.g.: type t = MyConstr | YourConstr of int = type t = MyConstr | YourConstr of int let myConstr = MyConstr let yourConstr i = YouConstr i Why do you say so? HOL Light uses capitalized identifiers for values, for example. It's probably possible to do whatever one reasonably wants. Function names and values are low id in OCaml (first letter must be uncapitalized). If you try to define let MyConstr = 0 in an OCaml toplevel, you will get a syntax error... The code generated by camlp4 must be syntactically correct. But maybe you are talking about a deeper integration? E.g. whenever you encounter the constructor YourConstr in expr, you transform it into fun i - YourConstr i. This should work but since camlp4 is limited to a single module, you won't be able to use this outside the module, because you won't have access to the definition of YouConstr and won't be able to determine his arity... But if you have an idea about how to solve this, just tell us. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Generalized Algebraic Datatypes
On 29-10-2010, Jacques Le Normand rathere...@gmail.com wrote: I didn't know about this alternate syntax; can you please describe it? cheers --Jacques It is on page 14: http://gallium.inria.fr/~xleroy/talks/cug2008.pdf And around 14:22 in the video: http://video.google.com/videoplay?docid=1704671501085578312hl=en# Regards Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] [ANN] oasis v0.2.0: Architecture for building OCaml libraries and applications
OASIS generates a full configure, build and install system for your application. It starts with a simple `_oasis` file at the toplevel of your project and creates everything required. It uses external tools like OCamlbuild and it can be considered as the glue between various subsystems that do the job. It also features a do-it-yourself command line invocation and an internal configure/install scheme. Libraries are managed through findlib. It has been tested on GNU Linux and Windows. It also allows to have standard entry points and description. It helps to integrates your libraries and software with third parties tools like GODI. Changelog and full blog post here: http://www.ocamlcore.com/wp/2010/10/oasis-v02-release/ Homepage: http://oasis.forge.ocamlcore.org/ Get source code: $ darcs get http://darcs.ocamlcore.org/repos/oasis Browse source code: http://darcs.ocamlcore.org/cgi-bin/darcsweb.cgi?r=oasis;a=summary [Generated by 'OASIS announce'] ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] [ANN] ocaml-data-notation v0.0.3: Store data using OCaml notation
This library uses `type-conv` to dump OCaml data structures using OCaml data notation. This kind of data dumping helps to write OCaml code generator, like OASIS. Changes: * Partial support for polymorphic variant, as used in OASIS v0.2.0 Homepage: http://forge.ocamlcore.org/projects/odn Get source code: $ darcs get http://darcs.ocamlcore.org/repos/ocaml-data-notation Browse source code: http://darcs.ocamlcore.org/cgi-bin/darcsweb.cgi?r=ocaml-data-notation;a=summary [Generated by 'OASIS announce'] ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: [ANN] oasis v0.2.0: Architecture for building OCaml libraries and applications
On 22-10-2010, Dario Teixeira darioteixe...@yahoo.com wrote: Hi, OASIS generates a full configure, build and install system for your application. It starts with a simple `_oasis` file at the toplevel of your project and creates everything required. Do you have plans to make GODI packages for Oasis and its dependencies? (I don't mean using Oasis to automate the generation of GODI packages; I mean GODI packages for Oasis itself). It's a little step that makes trying out new software all the more convenient... I don't have plans for GODI, but I plan to build Debian packages. I don't know (yet) GODI enough to do it. But I would help anyone who has plan about that. If you wan to try OASIS, there is an installer that should work out of the box on Linux/Windows (just providing the application, not the library). It is on the download page: https://forge.ocamlcore.org/frs/?group_id=54 Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: [ANN] oasis v0.2.0: Architecture for building OCaml libraries and applications
On 22-10-2010, bluestorm bluestorm.d...@gmail.com wrote: Changelog and full blog post here: http://www.ocamlcore.com/wp/2010/10/oasis-v02-release/ I've used oasis for small experiments, and I hope this project will gain traction. I found it perhaps still a bit rough on the dev. side : it's heavier than just writing a simple META file, but the benefits are important (in particular, you can avoid autoconf but still be more flexible than a simple Makefile-only build system), and it's particularly sweet on the user side. Have you tried the revamped quickstart subcommand. I am trying to make the creation of _oasis as easy as possible... If you have any suggestions to help make lighter, I'll be happy. BTW, when you say heavier, is it in term of complexity, of size of the generated setup.ml or something else? I'm not convinced with the linux-installer.bin you distribute, and prefer to build from source. oasis built flawlessly, but I first had to find the various dependencies; in particular, the oUnit version required is newer than the package available in either Godi or Debian, and your small dependencies (odn, ocamlify...) cannot be found elsewhere. They're very easy to build (thanks to... oasis), but the whole search-on-ocamlforge process is perhaps unnecessary. Could you provide an archive included the source of all those dependencies that are not in both Debian (testing) and GODI ? I'm currently using debian testing, and have needed the following files : - ocaml-data-notation-0.0.3.tar.gz - ocaml-expect-0.0.2.tar.gz - ocamlify-0.0.1.tar.gz - ounit-1.1.0.tar.gz (Of course, Oasis-DB will make all that a breeze ;-) And before OASIS-DB, there should be oasis bundle, that should do exactly what you ask me. I can try to create an experimental oasis-bundle-0.2.0.tar.gz. Will you test it? It's a triviality to say but I'm quite happy with the change in command-line invocation style (OASIS -setup = oasis setup). Four small comments regarding this : - when just typing oasis, it would be nicer to directly give the help page; darcs and git, for example, have this behavior that I find handy - the small message we currently have says [..] call 'oasis -help' for help. Wouldn't it be more consistent to call 'oasis help' ? I can see that you kept the -help/--help interface for compatibility with other command-line tools, but the subcommand-style is more consistent with the rest of the interface - git and darcs automatically call a pager when producing long text output; it would also be a nice thing to have in oasis, especially for the oasis manual - the current behavior of subcommand help (oasis help query) output first the general help, then the subcommand-specific help; I think just the subcommand-specific help would be a better output All this seems quite reasonable. May I ask you to submit feature requests about this on the BTS? Regards Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: [ANN] oasis v0.2.0: Architecture for building OCaml libraries and applications
On 22-10-2010, bluestorm bluestorm.d...@gmail.com wrote: On Fri, Oct 22, 2010 at 7:51 PM, Sylvain Le Gall sylv...@le-gall.netwrote: Have you tried the revamped quickstart subcommand. I am trying to make the creation of _oasis as easy as possible... If you have any suggestions to help make lighter, I'll be happy. BTW, when you say heavier, is it in term of complexity, of size of the generated setup.ml or something else? I think it's mostly a question of getting used to the new features of oasis. Oasis much more things than with a META (configuration, compilation, etc.), so the downside is that there are more things to specify in a _oasis file than in a META file. Indeed. During my work with various such tools (Makefile, META, etc.), I found out that I rely strongly on example files that I can copy/paste and modify/adapt. With time I have accumulated some templates for Makefile/META/_tags/myocamlbuild.ml covering my basics need, and I know where to look for more advanced things to imitate. I have not yet accumulated a comprehensive set of reusable _oasis files (though the documentation is certainly in the good direction), but I think it's just a matter of time. There are some examples linked from here: http://oasis.forge.ocamlcore.org/documentation.html And direct links to various other project that use OASIS in the real life here: http://oasis.forge.ocamlcore.org/alreadyusing.html I will be happy to add your examples or projects there, if you accumulate the same knowledge as with other tools. It's a triviality to say but I'm quite happy with the change in command-line invocation style (OASIS -setup = oasis setup). Four small comments regarding this : [..] All this seems quite reasonable. May I ask you to submit feature requests about this on the BTS? Done. Great, they will probably be in the 0.3.0 release. Cheers, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Unicode, update
Hello, On 14-10-2010, Paul Steckler st...@stecksoft.com wrote: A couple of weeks ago or so, I asked about using OCaml file primitives with the Camomile library for Unicode on Windows. I thought I'd update people on the list about my resolution of these issues. I decided to make the application UTF-8 throughout, so that the string type always means UTF-8 -- OK, there are a few exceptions to that rule. The SQLite3 library already deals with UTF-8 in a graceful way, The same is true for the C/C++ parsing library I'm using. That leaves the OCaml library procedures, like open_in and open_out, which definitely don't handle Unicode filenames on Windows. I took the OCaml sources and made modified versions of functions, like file_exists, open_in, and so on, that convert filenames from UTF-8 to UTF-16 and then used wide versions of the underlying Win32 primitives. In some cases, I had to convert UTF-16 back to UTF-8. The Win32 functions MultiByteToWideChar and WideCharToMultiByte handle those conversions nicely. I link in these new functions, named file_exists_win32, open_in_win32, etc., and everything works a treat. Would it be possible to publish them as an external library? Thanks for the update Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Type constraint to explain that a polymorphic variants is included into another
Hello, On 08-10-2010, Jacques Garrigue garri...@math.nagoya-u.ac.jp wrote: On 2010/10/09, at 2:13, Sylvain Le Gall wrote: Hello all, I would like to build an interface for plugins that allow to extract at the same time a very specific data for a plugin family and to extract general help for plugins. Here is an example: [...] This code doesn't compile because I see no way to explain that F.kind is included into plugin_kind. I'm not sure of what you are trying to do, but private rows where introduced with this goal in mind. The idea is to change the abstract definition of kind in PLUGIN_FAMILY to type kind = private [ plugin_kind] meaning that kind can be instantiated to any subset of plugin_kind. You can then use subtyping to convert from kind to plugin_kind. Very nice OCaml extension. It indeed solves my problem. I was aware of private type, but don't yet know how to use it. Here is a typable version of your code. let run pkg = prerr_endline (help (pkg.plugin_build : MapPlugin.key)); prerr_endline (help (pkg.plugin_install : MapPlugin.key)); (Build.act pkg.plugin_build) (); Install.act pkg.plugin_install [] That is perfect. If I add the following call, with your solution: (Install.act pkg.plugin_build) [] I get this error: ocamlc -o test test.ml File test.ml, line 84, characters 14-30: Error: This expression has type [ `Build ] plugin = [ `Build ] * string but an expression was expected of type [ `Install ] plugin = [ `Install ] * string These two variant types have no intersection make: *** [all] Erreur 2 This is exactly what I want. Thanks, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Type constraint to explain that a polymorphic variants is included into another
Hello all,
I would like to build an interface for plugins that allow to extract at the
same time a very specific data for a plugin family and to extract
general help for plugins.
Here is an example:
(** All the plugins I want to manage *)
type plugin_kind = [`Build | `Install]
(** Generic plugin *)
type 'a plugin = 'a * string
(** Help data for all plugin *)
module MapPlugin =
Map.Make
(struct
type t = plugin_kind plugin
let compare = compare
end)
let all_help: string MapPlugin.t ref =
ref MapPlugin.empty
let help plg =
MapPlugin.find plg !all_help
(** Functor to build function related to one type of plugin *)
module type PLUGIN_FAMILY =
sig
type act
type kind
val kind_default: kind
end
module Make (F: PLUGIN_FAMILY) =
struct
module MapPluginSelf =
Map.Make
(struct
type t = F.kind plugin
let compare = compare
end)
let all_act: F.act MapPluginSelf.t ref =
ref MapPluginSelf.empty
let act (plg : F.kind plugin) =
MapPluginSelf.find plg !all_act
let create name help act =
let id =
F.kind_default, name
in
all_help := MapPlugin.add id help !all_help;
all_act := MapPlugin.add id act !all_act;
id
end
(** Functions for build plugins *)
module Build =
Make
(struct
type act = unit - unit
type kind = [`Build]
let default = `Build
end)
(** Functions for install plugins *)
module Install =
Make
(struct
type act = string list - unit
type kind = [`Install]
let default = `Install
end)
type package =
{
name: string;
plugin_build: [`Build] plugin;
plugin_install: [`Install] plugin;
}
let run pkg =
prerr_endline (help pkg.plugin_build);
prerr_endline (help pkg.plugin_install);
(Build.act pkg.plugin_build) ();
(Install.act pkg.plugin_install) ()
This code doesn't compile because I see no way to explain that F.kind is
included into plugin_kind.
Here is the precise error:
camlc -o test test.ml
File test.ml, line 51, characters 32-34:
Error: This expression has type F.kind * 'a
but an expression was expected of type
MapPlugin.key = plugin_kind * string
Type F.kind is not compatible with type
plugin_kind = [ `Build | `Install ]
make: *** [all] Erreur 2
Does anyone know a good solution to this problem? Does anyone have a
better solution to this problem? (different design?)
Thank you for your answers,
Sylvain Le Gall
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[Caml-list] Re: Type constraint to explain that a polymorphic variants is included into another
On 08-10-2010, Jake Donham j...@donham.org wrote: On Fri, Oct 8, 2010 at 10:13 AM, Sylvain Le Gall sylv...@le-gall.net wrote: This code doesn't compile because I see no way to explain that F.kind is included into plugin_kind. As you have written it, F.kind is of course completely abstract. I am not sure where you need F.kind to be a strict subtype of plugin_kind, but you could say type kind = plugin_kind (this seems a bit useless however). I don't think there is a way to use subtyping implicitly when applying a functor, but you can always do it explicitly by interposing a module of signature PLUGIN_FAMILY which embeds the specific kind in plugin_kind and passes the other components through. You could also have a general and a specific type in the plugin signature, and use the general one for general operations (e.g. help) but the specific one wherever that is needed. I am not sure I understand what you're trying to achieve however. My goal is that the compiler prevents me to do Build.act pkg.plugin_install - because plugin_install is of type [`Install] plugin and Build.act needs [`Build] plugin but allow me to do help pkg.plugin_install - because help needs [`Build | `Install] plugin. But maybe I am missing something here and try to overengineer something simple. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] [ANN] ounit v1.1.0: Unit testing framework
OUnit is a unit testing framework for OCaml, inspired by the JUnit tool for Java, and the HUnit tool for Haskell. More information on [HUnit](http://hunit.sourceforge.net) Changes: - Add a ~pp_diff parameter to assert_equal and some classic diff operations (Closes: #635, #642) - Add an assert_command function (Closes: #641) - Add a bracket_tmpfile to ease temporary file use - Enhance documentation, translate the docbook manual into ocamldoc and add content - Allow to add extra command line arguments to run_test_tt_main (Closes: #640) - Add a -list-test options to run_test_tt_main, to list available tests - Skip tests when using -only-test, rather than removing it. This way the path is the same even if some tests don't pass (Closes: #637) - Add backtrace support (Closes: #639), thanks to Michael Ekstrand - Use OASIS - Move to OCaml Forge: http://ounit.forge.ocamlcore.org - Maintainance is now done by Sylvain Le Gall (OCamlCore SARL), thanks to Maas-Maarten Zeeman for all his work __As you see there are a lot of changes. OUnit is evolving, feel free to submit bug reports or contribute your own OUnit snippet if it can be included in the library.__ Homepage: http://ounit.forge.ocamlcore.org Get source code: $ darcs get http://darcs.ocamlcore.org/repos/ounit Browse source code: http://darcs.ocamlcore.org/cgi-bin/darcsweb.cgi?r=ounit;a=summary [Generated by 'OASIS announce'] ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] [ANN] ocaml-expect v0.0.2: Expect-like framework
This is a simple implementation of `expect` to help building unitary testing of interactive program. It helps to receive question and send answers from an interactive process. You can match the question using a regular expression (Str). You can also use a timeout to ensure that the process answer in time. See the [Expect manual](http://expect.nist.gov/) for more information and example. Changes: * Add a ~fmatch to expect, to dynamically define expect results * Allow to pass environment and redirect stderr to spawn * Add `Suffix/`Prefix/`Contains tests * Separate Str, add Pcre, create findlib packages expect.str and expect.pcre Homepage: http://forge.ocamlcore.org/projects/ocaml-expect/ Get source code: $ darcs get http://darcs.ocamlcore.org/repos/ocaml-expect Browse source code: http://darcs.ocamlcore.org/cgi-bin/darcsweb.cgi?r=ocaml-expect;a=summary [Generated by 'OASIS announce'] ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: what do I need to know to understand camlp4
On 23-09-2010, ben kuin benk...@gmail.com wrote: Could someone give any idea how I can begin to understand how to write simple camlp4 extensions? If you consider yourself as a n00b, don't start by camlp4. This is probably the most difficult part of OCaml -- and to program camlp4 you need to use OCaml standard syntax (or revised syntax, it depends if you use antiquotations). If you still want to follow the hard path, as suggested elsewhere, Jake Donham's blog posts are very good: http://ambassadortothecomputers.blogspot.com/p/reading-camlp4.html Or if you are around, there is a tutorial session at CUFP: http://cufp.org/conference/sessions/2010/camlp4-and-template-haskell (but you need to subscribe). Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: How can I set a type parameter of Map.Make(X) ?
On 20-09-2010, Dumitru Potop-Butucaru dumitru.potop_butuc...@inria.fr wrote: I'm certain most users here will consider the question trivially simple, but I browsed the documentation without finding a solution. There is an ocaml-beginner list, if you feel the question is trivial: http://tech.groups.yahoo.com/group/ocaml_beginners/ The question is quite general: Given a polymorphic definition like Map.Make(X), where X is some module, how can I specialize its 'a type parameter, e.g. by setting it to Y, so that I have maps from X to Y ? module M = Map.Make(X) type y_map = y M.t (* N.B. Y is syntactically incorrect for a type identifier, you need to use y *) Regards Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: OCaml projects on github, hard to find?
On 20-09-2010, Mike Lin mike...@mit.edu wrote: On Fri, Sep 17, 2010 at 5:04 AM, Sylvain Le Gall sylv...@le-gall.net wrote: Could OCamlForge be set up to do one-click read-only mirroring of interesting github projects? That is a possible project: https://forge.ocamlcore.org/tracker/index.php?func=detailaid=604group_id=1atid=102 The main problem is that we need to create this kind of function. Most of the forge around doesn't provide an easy coordination with other forges. But I think, it is feasible. I'll just chime in my support for something like this although I am also too busy to work on it. I have a couple longstanding projects on OCaml Forge, and as much as I support concentrating OCaml stuff in one place, it's just very difficult to resist github's ultra-slickness. I agree with that the ultra-slickness of github is something nice. As far as I am concerned, I don't see as a problem to use github for source code and distribute release through the forge. You can benefit from BTS/mailing list/aggregated news et al on the forge. I think release distribution, bug tracking and news is something that should be enough to concentrate OCaml stuff in one place and provide a good indexing of your project (not to say, that it will also cross-link your github project, thus enhance your PageRank). If you want to use github, just hide the source tab of the project and leave a note on the project webpage. Ideally, if someone has the time to code a github plugin for the forge, you can choose github as SCM and been redirected to the github project. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] OCaml projects on github, hard to find?
Hello all, Before anyone claimed that I am not honest, let me be clear: I am one of the admin of OCaml Forge, so I am biased. So here is my problem, from time to time I found interesting OCaml projects on github. But some are really hard to find. Let me take some simple examples, using google search and small projects: project URL, description, google request - n° page where the first entry is * http://github.com/polazarus/oclock, Access to POSIX clock_gettime, ocaml clock - 7+ * http://github.com/thelema/tornadocaml, xor-based FEC, ocaml tornado - 7+ This is not the case for everything, (e.g. ocaml-appengine, ocaml-orm-sqlite, ocaml-redis et al are ranked 1st page). Even if these projects are small, it would be great that they did a single release and to be referenced on the Hump, for example. N.B. modifying google request can improve ranking e.g. ocaml xor fec or ocaml fec. Regards, Sylvain Le Gall p.s.: if someone can volunteer to create a small application that automatically fetch new projects/news from project on github/google code/whatever, I will be happy to add it to planet.ocamlcore.org. ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: OCaml projects on github, hard to find?
On 17-09-2010, Martin DeMello martindeme...@gmail.com wrote: On Fri, Sep 17, 2010 at 2:13 PM, Sylvain Le Gall sylv...@le-gall.net wrote: Hello all, Before anyone claimed that I am not honest, let me be clear: I am one of the admin of OCaml Forge, so I am biased. So here is my problem, from time to time I found interesting OCaml projects on github. But some are really hard to find. Let me take some simple examples, using google search and small projects: Could OCamlForge be set up to do one-click read-only mirroring of interesting github projects? That is a possible project: https://forge.ocamlcore.org/tracker/index.php?func=detailaid=604group_id=1atid=102 The main problem is that we need to create this kind of function. Most of the forge around doesn't provide an easy coordination with other forges. But I think, it is feasible. I would do it myself, but I am pretty busy with other (I hope) important projects like OASIS-DB. If someone can provide me a solution for this, I will be happy to put it on forge.ocamlcore.org. A nice first step, could be to just mirror the git repository from github. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: How to re-implement the GC?
Hi, On 13-09-2010, Eray Ozkural examach...@gmail.com wrote: Hi there, What exactly are the requirements for substituting the current GC with another, preferably non-locking, GC? Any pitfalls I wouldn't see just reading the code? The GC is deeply interacting with the the rest of the compiler. I think you will spend a lot of time on this task. I would recommend you trying OC4MC, which is probably what you are looking for: http://www.algo-prog.info/ocmc/web/ They show quite interesting results using Thread at the last OCaml Meeting, though they are still some bugs (almost linear speed-up with multicore). Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: How to re-implement the GC?
On 13-09-2010, Eray Ozkural examach...@gmail.com wrote: On 13-09-2010, Eray Ozkural examach...@gmail.com wrote: Hi there, What exactly are the requirements for substituting the current GC with another, preferably non-locking, GC? Any pitfalls I wouldn't see just reading the code? The GC is deeply interacting with the the rest of the compiler. I think you will spend a lot of time on this task. Deeply interacting with the compiler, how? Not through the public interface of GC? Do you mean it is not used in a clean way? I am not sure how you define clean way. I think it is very efficient, but not modular or object-oriented. I would say that it is clean with regard of the efficiency. But I won't use it to demonstrate how GC works to student (but I won't either show them real world implementation of other GC which are always more complex when optimization is required). AFAIK, it uses some machine register to store a pointer to the minor heap. But I am not a GC expert. I would recommend you trying OC4MC, which is probably what you are looking for: http://www.algo-prog.info/ocmc/web/ Yes, I've seen it but it's a work in progress, and it's being rewritten from scratch. If you stick to 3.11.1 OCaml version, you'll be able to compile with one of their latest stable patch. To be honest, I think that if you join your efforts with theirs, you'll probably get something quicker than going alone on this path. But this is only my opinion. At least, you will need the fully-reentrant runtime they are doing. They show quite interesting results using Thread at the last OCaml Meeting, though they are still some bugs (almost linear speed-up with multicore). What exactly is the GC being used there? Is it a custom algorithm or a known one? Could we plug our own algorithm to the oc4mc if it has already provided the basic changes to substitute the GC? I think you won't be able to plugin your own GC. The one they provide is a stop the world... I am not sure though, ask them directly. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: How to re-implement the GC?
On 13-09-2010, Eray Ozkural examach...@gmail.com wrote: --===0758070018== Content-Type: multipart/alternative; boundary=000e0cd18672fce48b049024b79e --000e0cd18672fce48b049024b79e Content-Type: text/plain; charset=ISO-8859-1 On Mon, Sep 13, 2010 at 3:22 PM, Sylvain Le Gall sylv...@le-gall.netwrote: On 13-09-2010, Eray Ozkural examach...@gmail.com wrote: On 13-09-2010, Eray Ozkural examach...@gmail.com wrote: Hi there, What exactly are the requirements for substituting the current GC with another, preferably non-locking, GC? Any pitfalls I wouldn't see just reading the code? The GC is deeply interacting with the the rest of the compiler. I think you will spend a lot of time on this task. Deeply interacting with the compiler, how? Not through the public interface of GC? Do you mean it is not used in a clean way? I am not sure how you define clean way. I think it is very efficient, but not modular or object-oriented. I would say that it is clean with regard of the efficiency. But I won't use it to demonstrate how GC works to student (but I won't either show them real world implementation of other GC which are always more complex when optimization is required). Well, programming anything in C is messy, I suppose. AFAIK, it uses some machine register to store a pointer to the minor heap. But I am not a GC expert. Ah, that's interesting. I wonder if it provides any real speedup on new architectures compared to storing the pointer in RAM. take this with care, I am still not a GC expert I think it provides an ultra quick way to allocate data on the minor heap. For heavy allocating programming languages like FP, it is a good speedup. Other GC algorithm for Java/C# often made the assumption of long-living objects with mutation. This is not the case for OCaml. /take this with care I would recommend you trying OC4MC, which is probably what you are looking for: http://www.algo-prog.info/ocmc/web/ Yes, I've seen it but it's a work in progress, and it's being rewritten from scratch. If you stick to 3.11.1 OCaml version, you'll be able to compile with one of their latest stable patch. http://www.algo-prog.info/ocmc/distribution/ Which one is it? Maybe this one: http://www.algo-prog.info/ocmc/distribution/oc4mc-toronto-stack32k.tar.gz It seems to be based on 3.11.1. I really don't know in fact, I am not a oc4mc expert. They show quite interesting results using Thread at the last OCaml Meeting, though they are still some bugs (almost linear speed-up with multicore). What exactly is the GC being used there? Is it a custom algorithm or a known one? Could we plug our own algorithm to the oc4mc if it has already provided the basic changes to substitute the GC? I think you won't be able to plugin your own GC. The one they provide is a stop the world... I am not sure though, ask them directly. That's unfortunate, too, because from reading their source code I had had the impression that they had in mind an easy way to plug-in my GC. One with global lock isn't good enough though, it will not have good performance with memory intensive programs. Hence, my question, suppose this project actually made progress in other parts of the code (like making the runtime fully re-entrant) how do I go about implementing a state-of-the-art GC for this, are there any special requirements or do I just have to implement a minor heap and a major heap etc. to match the interface and the parameters and I am done? I mean, is this a garbage collector as we know it, or does it have any exotic features or requirements? I am looking to see if a competent programmer without an intimate knowledge of the whole compilation system can do it. I really don't know how to answer, contact directly the OC4MC team. I only answer you with the data they give at OCaml Meeting, back in April. Regards Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: [ANN] camera-rescue v0.0.1: Recover JPEG files from a crashed SD/MMC/CF camera memory card
On 08-09-2010, Gabriel Kerneis kern...@pps.jussieu.fr wrote: On Tue, Sep 07, 2010 at 10:50:42PM +0200, Sylvain Le Gall wrote: This program searches for JPEG files into a dump of a memory card (a RAW file). Once found, each files is saved in a different JPEG file. Out of curiosity, what is the difference with recoverjpeg (except the programming language)? http://www.rfc1149.net/devel/recoverjpeg As another user points me to, there is also: http://www.cgsecurity.org/wiki/PhotoRec camera-rescue is probably not as good as these other tools. There are plenty of tools like this one. But it makes a good example code ;-) Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] [ANN] ocaml-expect v0.0.1: Expect-like framework
This is a simple implementation of `expect` to help building unitary testing of interactive program. It helps to receive question and send answers from an interactive process. You can match the question using a regular expression (Str). You can also use a timeout to ensure that the process answer in time. See the [Expect manual](http://expect.nist.gov/) for more information and example. Homepage: http://forge.ocamlcore.org/projects/ocaml-expect/ Get source code: $ darcs get http://darcs.ocamlcore.org/repos/ocaml-expect Browse source code: http://darcs.ocamlcore.org/cgi-bin/darcsweb.cgi?r=ocaml-expect;a=summary [Generated by 'OASIS announce'] ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: CUFP 2010 is coming! (Oct 12 in Baltimore MD)
On 05-09-2010, Jon Harrop jonathandeanhar...@googlemail.com wrote: Intel is developing a functional language which will scale on multicore machines This sounds very interesting. Any references or a name? Following links provided in the initial mail: http://cufp.org/conference/sessions/2010/functional-language-compiler-experiences-intel Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] [ANN] Cryptokit 1.4
Hello all, We have released a new version of cryptokit. The changes are the following: - Added Blowfish block cipher. - Added MAC functions based on HMAC construction applied to SHA-256 and RIPEMD-160. - Added OASIS and findlib support You can download it from: http://forge.ocamlcore.org/projects/cryptokit/ or for testing oasis-db: http://oasis.ocamlcore.org/dev/browse?pkg=cryptokit Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Create a constraint between variant type and data list
Hello all, I would like to somehow enforce that a variant type is associated with an entry in a data list. For example, I would like to define: type license = GPL | LGPL and let data = [ GPL, GNU Public license; LGPL, GNU Lesser General Public license ] I would like to enforce that all variants of license are in the association list. I have tried to use polymorphic variants, but don't see how to enforce this constraint. The point, is that if I add a new variant to license (e.g. BSD3), the compiler output an error because this new variant is not in data list. Any ideas ? If you need to use another type expression rather than variant, please do so, as long as I am able to link the license type and data list. Thanks all, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Create a constraint between variant type and data list
On 03-09-2010, Maxence Guesdon maxence.gues...@inria.fr wrote: Le Fri, 3 Sep 2010 17:16:48 + (UTC), Sylvain Le Gall sylv...@le-gall.net a écrit : A solution is to add your new license to your list of associations, then the compiler will complain about the unknown variant :) This is my current solutions. I try to find something better ;-) Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: ANN: ocamljs 0.3
Hello, On 27-08-2010, Mihamina Rakotomandimby miham...@gulfsat.mg wrote: j...@donham.org : I am happy to announce version 0.3 of ocamljs. Ocamljs is a system for compiling OCaml to Javascript. What are the differences between: - OBrowser (http://www.pps.jussieu.fr/~canou/obrowser/tutorial/) OBrowser seems to be replaced by Js_of_OCaml - Js_of_OCaml (http://ocsigen.org/js_of_ocaml/overview) - OcamlJS Have a look at: http://ambassadortothecomputers.blogspot.com/2010/08/ocamljs-03.html Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Please provide at least one page for your ocaml projects
On 25-08-2010, Sylvain Le Gall sylv...@le-gall.net wrote: On 25-08-2010, Maxence Guesdon maxence.gues...@inria.fr wrote: Indeed, having to look for this information in a tarball of a git repos (with gitweb) is not very convenient. Even the project page on a forge is not the best way to get the information quickly. It's more a view for a developer/contributor, not for a potential user. Every project on forge.ocamlcore.org can upload a simple webpage and it will be displayed on http://PROJECT.forge.ocamlcore.org. Just add html files to /home/groups/PROJECT/htdocs on ssh.ocamlcore.org, same ssh key as git/darcs/svn login. You can use rsync, scp or unison. Feel free to contact me if you need further utilities for your project. Examples of web pages: http://oasis.forge.ocamlcore.org/ http://ocaml-lua.forge.ocamlcore.org/ http://ounit.forge.ocamlcore.org/ http://pa-do.forge.ocamlcore.org/ http://ocamlviz.forge.ocamlcore.org/ http://cmdline-args.forge.ocamlcore.org/ http://camlbz2.forge.ocamlcore.org/ http://ocaml-autoconf.forge.ocamlcore.org/ If you lack inspiration, just copy/adapt these webpages. They are all accessible on /home/groups/PROJECT/htdocs/. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Question about float refs.
On 23-08-2010, Ethan Burns burns.et...@gmail.com wrote: On Mon, Aug 23, 2010 at 8:06 AM, Christophe TROESTLER christophe.troestler+oc...@umh.ac.be wrote: On Thu, 19 Aug 2010 07:52:33 -0400, Ethan Burns wrote: let r = ref 0.0 ;; for i = 0 to 10 do r := float i done; Printf.printf %f\n !r; Printf.printf words: %f\n (Gc.stat ()).Gc.minor_words To add a precision to others' answers : float refs are unboxed _locally_. If you rewrite your code as let r = ref 0.0 in for i = 0 to 1000_000_000 do r := float i done; Printf.printf %f\n !r; Printf.printf words: %f\n (Gc.stat ()).Gc.minor_words then it runs at about the same speed as you other version. $ time ./a.out 10.00 words: 200367.00 real 0m2.655s It does seem to run a lot faster than my first version, but it also seems to allocate a whole lot. If it is still allocating just as much why is this version so much faster? Allocation on the minor heap is very cheap compared to assignement into the major heap. It is better to allocate a lot on the minor heap than to do operations on the major heap. I think the main reason for the difference is that the first example (float ref not local) implies a call to caml_modify (byterun/memory.c|h) which has a cost. This cost is bigger on amd64 architecture because one test is quite expensive (Is_in_heap I think) due to address space randomization. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Fwd: More re GC hanging
On 15-08-2010, Paul Steckler st...@stecksoft.com wrote: On Sun, Aug 15, 2010 at 7:16 PM, Basile Starynkevitch bas...@starynkevitch.net wrote: Are you sure that you don't have badly coded C routines that you call from your Ocaml code (don't forget correct use of CAMLparam CAMLlocal, read again carefully http://caml.inria.fr/pub/docs/manual-ocaml/manual032.html and perhaps other material about precise garbage collectors). I'm not calling any C code directly. I am using the ocaml-ssl library, which has some simple calls into the OpenSSL library. Maybe it has nothing todo, but you talked about ocaml-ssl possibly and your application hanging, it reminds me: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=591891 ocaml-ssl and ocaml-dbus are involved, so maybe the guilty party is ocaml-ssl -- this is just a guess, not sure about anything. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: scalable web apps
On 26-07-2010, Dario Teixeira darioteixe...@yahoo.com wrote: Hi, I am creating an application with ocsigen that requires to serve a lot of .tar.gz as static contents. Do you think the no Unix supports non-blocking mode will cause problem in this case? I presume that application is related to the Oasis-DB initiative, right? You guess right ;-) I wouldn't worry too much in that case. First, because the Ocaml community is not that big (yet) as to cause such heavy traffic. Second, because the set of tar.gz files is not that great (a few hundred, max?) and those files will tend to be small. If your server has enough memory, there's a good chance many of the file blocks requested will eventually be buffered in memory by the kernel, thus minimising expensive disc I/O. There is indeed a good chance that the files end up in memory. Thank you for your remarks. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: scalable web apps
On 26-07-2010, Florent Monnier monnier.flor...@gmail.com wrote: Le lundi 26 juillet 2010 13:20:46, Dario Teixeira a écrit : Hi, How does Ocsigen handle database operations? I thought it was using PG'OCaml, but maybe I'm wrong. Ocsigen itself does not use PG'OCaml. The two are frequently associated because the latest versions of PG'OCaml are Lwt-friendly and therefore a good choice for Ocsigen apps. (Note that internally, Ocsigen uses either Dbm or Sqlite to store session data). Both Dbm and Sqlite lock the entire files which blocks concurrent uses, isn't it a problem? For sqlite, at least, it uses Lwt_preemptive.detach and sqlite3 contains the required caml_enter/leave_blocking_section(s). So Lwt should work without problems with sqlite. I suppose it is the same for dbm. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: scalable web apps
On 26-07-2010, Gabriel Kerneis kern...@pps.jussieu.fr wrote: On Mon, Jul 26, 2010 at 05:10:01PM +, Sylvain Le Gall wrote: Both Dbm and Sqlite lock the entire files which blocks concurrent uses, isn't it a problem? For sqlite, at least, it uses Lwt_preemptive.detach and sqlite3 contains the required caml_enter/leave_blocking_section(s). So Lwt should work without problems with sqlite. I suppose it is the same for dbm. No. For dbm there is a separate daemon (ocsidbm) opening the file once and serializing requests sent from and back to Ocsigen through a pipe. Thanks for this clarification. So basically, it also works with Lwt but using a little bit heavier backend (i.e. launching a process rather than launching a thread). Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: scalable web apps
On 24-07-2010, Joel Reymont joe...@gmail.com wrote: How do you build scalable web apps with OCaml? Do you use Apache with mod_caml? Naked Ocsigen? Do you put Ocsigen behind Nginx? I think that using ocsigen should be enough. There was a nice presentation by Dario Texeira at the last OCaml Meeting: https://forge.ocamlcore.org/docman/view.php/77/106/ocaml-web-startup.pdf (he talks about dispatcher from page 5 to 10, a way to use all the processing power of a server) Unfortunately, he said more things than what is written. The video of his talk is on my computer -- I will publish it when I have time. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Cryptokit and HMAC-SHA256
Hello, On 22-07-2010, Goswin von Brederlow goswin-...@web.de wrote: Dario Teixeira darioteixe...@yahoo.com writes: Hi, If you decide to code the solution and provide the patch, I will be happy to apply it to cryptokit (if the main author of cryptokit accepts it, of course). I'm attaching the patches adding support for HMAC-SHA256 and HMAC-RIPEMD160 (I don't need the latter, but for the sake of completeness it seemed silly not to support it as well). Note that these are *very* straightforward patches -- kudos to Xavier for making Cryptokit so easy to extend. The caveat is that I'm not a cryptographer. I did, however, verify that these new HMACs pass all the test cases listed in RFC4231 (for HMAC-SHA256) and RFC2286 (for HMAC-RIPEMD160). Thanks for your attention! Cheers, Dario Teixeira While you are patching cryptokit anyway would it be possible to also add functions to work on Bigarrays? Well in fact, HMAC-SHA256 and HMAC-RIPEMD160 has been implemented in the source code, but never released. So no patching involved. One huge advantage of bigarray is that the data region is allocated outside the GC heap and will never move. That means one can use enter_blocking_section() / leave_blocking_section() while calculating the checksum for a block of data. For multithreaded applications that can speed up the program by the number of cores present. Submit a feature request with as much data as possible on the BTS: https://forge.ocamlcore.org/tracker/?group_id=133 Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Cryptokit and HMAC-SHA256
On 21-07-2010, Dario Teixeira darioteixe...@yahoo.com wrote: Hi, I need a keyed hash function (HMAC) based on SHA256. I looked at Cryptokit's support for HMAC, and though it has built-in support for HMAC-MD5 and HMAC-SHA1, it seems HMAC-SHA256 is not directly supported, despite Cryptokit implementing the SHA256 algorithm. While RFC 2104 seems straightforward enough and there's always the option of adapting Cryptokit's HMAC-SHA1 code, I wonder if someone else out there either a) has already done this, or b) knows of an alternative library implementing HMAC-SHA256. If you decide to code the solution and provide the patch, I will be happy to apply it to cryptokit (if the main author of cryptokit accepts it, of course). Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Binding the Lua library [was: adding a scripting language to an ocaml program]
On 06-07-2010, Guillaume Yziquel guillaume.yziq...@citycable.ch wrote: Paolo Donadeo a écrit : If anyone is interested in my prototype I could clean up the source, remove comments in Italian and publish it on GitHub or OCamlCore. I'm always interested in language bindings... And I think a few other people are interested in an Lua binding. I think Guillaume is refering to me. I am indeed quite interested in this kind of binding, especially to measure the performance of the Lua language interacting with OCaml. I would use Lua to create functions to process huge amount of data and to replace a DSL I created. So far, we have: http://bitbucket.org/dpowers/luacaml by David Powers a prototype by Paolo Donadeo lua-ml by Christian Lindig Maybe we can join our forces to create a common binding to Lua from OCaml. I propose to host it at http://forge.ocamlcore.org, we can even have an hg repository if needed. If anyone is interested, I think more forces to this effort are welcome. I would be glad that at least David, Paolo and Christian join ;-) Regards, Sylvain Le Gall ps: right now I can provide some time to setup the forge account and web pages, but I will have to dedicate a lot of time to real life starting on Friday (or before -- depending the time my daughter will choose to born). ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: exception error trace back in ocaml
On 21-06-2010, lin hong lh...@amnh.org wrote: I have problem getting a full traceback of some exception error. The traceback looks like this: Fatal error: exception Invalid_argument(index out of bounds) Raised at file camlinternalLazy.ml, line 33, characters 10-11 Called from file list.ml, line 74, characters 24-34 But that's all I got, both camlinternalLazy.ml and list.ml are ocaml source code, I still don't know which part of my code trigger it. Also, in camlinternalLazy.ml line 33, there is a try with e - raise e, is this the reason I don't have a full traceback -- Maybe something else catch the raise e ? Any idea? To get the full trace, you need to compile your code with -g, i.e. ocamlc -g foo.ml If you don't have this debug flag, you won't see calls from the code you compiled. The try ... with e - raise e just re-raise the exception and you will be able to see it in the full trace. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Unix.send blocks
On 16-06-2010, Paul Steckler paul.steck...@nicta.com.au wrote: I've written a wee Web server in OCaml that's compiled using the ocamlopt from the Fedora MinGW distribution of ocaml. I'm running the server in Windows 7. Sometimes after receiving several requests, the Unix.send call that sends a response back to a Web client just blocks. The send buffer is pretty large (64k), and the data to be sent is always much less than that. While it's easy to reproduce the error (a certain pattern of requests from the browser), I can't tell what particular conditions cause the blocking behavior. Any help appreciated. I don't have a clue but maybe you can tell us more about the pattern of requests from the browser. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Unix.send blocks
On 16-06-2010, Christoph Bauer christoph.ba...@lmsintl.com wrote: While it's easy to reproduce the error (a certain pattern of requests from the browser), I can't tell what particular conditions cause the blocking behavior. Any help appreciated. I guess you are using Unix.select. There is (was) a bug in the windows select implementation. It had problems with the GC. http://caml.inria.fr/mantis/view.php?id=4844 There was when OCaml 3.12 will be out ;-) However, I think it should have crash if it falls into this bug. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Unix.send blocks
On 16-06-2010, Török Edwin edwinto...@gmail.com wrote: On 06/16/2010 10:32 AM, Paul Steckler wrote: You could set the socket to nonblocking mode (and check with 'select' whether you can send), but according to the manual that doesn't work on the native windows port of OCaml. select works on Windows with latest version of OCaml. But there were a couple of bugs corrected in version 3.12 (esp. O_NONBLOCK + select). Next version will be safer for the use of select on Windows. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: [ANN] Camomile 0.7.3
In gmane.comp.lang.caml.inria, you wrote: 2010/5/14 Dmitry Bely dmitry.b...@gmail.com How heavy-weight is Camomile? I was a bit scared with the size of its distribution. Currently I use under Windows the following my own simple Unicode-support module (implemented via WideCharToMultiByte/MultiByteToWideChar Win32 API functions). Maybe it's time to switch to Camomile? The size of the package is due to mapping tables of character encoding and localization data. they occupy several mega bytes on the disk but it is nothing by today's standard. If you still care, you can delete any .mar files in charmaps, locales, mappings directory. (Deleting source files in these directory is not recommended, since it could cause a failure of compilation.) If you delete such files, related encoding and locales do not function, but other functionality is intact. I have just compared libcamomile-ocaml-data and locales-all packages. The two packages contain almost the same thing: http://packages.debian.org/sid/libcamomile-ocaml-data http://packages.debian.org/sid/locales-all The size is almost the same (3MB vs 5MB) but the uncompressed size is not at all the same: - camomile: 24MB - locales-all (2 steps uncompression): 99MB At least it means that camomile data is a reasonable size for this kind of data on Linux system. On Windows system, I think these figures are almost the same but data are part of the base windows installation. Now, a question/suggestion/feature: is it possible to store .mar file as .mar.gz? This would help to reduce occupation by a factor of 5... Regards Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: about OcamIL
On 14-05-2010, ben kuin benk...@gmail.com wrote: Isn't this precisely the aim of Jon's hlvm (www.ffconsultancy.com/ocaml/hlvm/)? licensing: Hlvm is driven by a company and its landing page is on a companies website and one of its protagonists is smart *and* business savvy. What if hlvm would really take off, could they set it free and move the homepage to sourceforge ? Last time, I checked hlvm homepage was here: http://hlvm.forge.ocamlcore.org What difference will it make to set it on sourceforge? The reasoning you apply to a possible change of license can be applied to a lot of thing in Open Source World... Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Mbox-Readers
On 11-05-2010, oli...@first.in-berlin.de oli...@first.in-berlin.de wrote: Hello, are there mbox-Libraries around? You can have a look at: https://forge.ocamlcore.org/scm/viewvc.php/trunk/mbox.ml?view=markuprevision=11root=spamoracle There are other files in the repository that can maybe match other requirements. This is not a complete mbox-reader but it can help you on some points (at least to see what other people have done). You can use it as an helper to write your own. P.S.: And: what kind of License would make sense? LGPL3? In doubt, I recommend LGPL 2.1 with OCaml linking exception. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Subtyping structurally-equivalent records, or something like it?
On 04-05-2010, rossb...@mpi-sws.org rossb...@mpi-sws.org wrote: Sylvain Le Gall sylv...@le-gall.net: This is not about optimized compiler in this case but about data representation. Even if you use an optimized compiler (which is not really the case with ocamlopt), you won't change datastructure representation to optimize. What do you mean? There is no reason in general why a compiler cannot optimize data representations, and some do in cases like this. Anyway, if it comes to data alignement and things like that, the compiler should optimize data representations. But in this case, I really don't think we are talking about data alignement. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: OCaml / F# co-development
On 03-05-2010, Benjamin Pierce bcpie...@cis.upenn.edu wrote: Is anybody out there developing code in the common subset of OCaml and F# so that it works with both compilers / libraries? I'd be very interested in hearing about the feasibility of this arrangement... There was a series of blog posts by CoherentPDF on http://planet.ocamlcore.org 1 year ago. Here is one of them: http://coherentpdf.com/blog/?p=10 Browse their archives to have more: http://www.coherentpdf.com/news-archive.html Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Subtyping structurally-equivalent records, or something like it?
On 01-05-2010, Dario Teixeira darioteixe...@yahoo.com wrote:
Hi,
type kinematic = { lin: Vec.t; ang: Vec.t }
Which I've been using to represent a medley of physical attributes (force,
momentum, velocity, etc.).
I second Stéphane's suggestion of using phantom types; moreover,
I recommend you read an article that discusses them to some detail
and covers their use for precisely this sort of problem:
http://camltastic.blogspot.com/2008/05/phantom-types.html
I really like the use of private type abbreviation for phantom type:
http://ocaml.janestreet.com/?q=node/77
Regards,
Sylvain Le Gall
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[Caml-list] Re: Extending Set - strange behavior of abstract type
On 27-04-2010, Dawid Toton d...@wp.pl wrote: I tried to extend the standard Set module with new operations. I got error messages about type incompatibilities (the Set.S.t as exposed by my implementation and Set.S.t used by functions from the original Set). I have reduced my code to the following small example: module Set = struct module Make (Ord : Set.OrderedType) = struct module Set = Set.Make(Ord) include Set end end module OrdChar = struct type t = char let compare = compare end module Raw1 = Set.Make (OrdChar) module Raw2 = Set.Make (struct type t = char let compare = compare end) let aaa (aa : Raw1.t) (bb : Raw1.Set.t) = (aa = bb) let aaa (aa : Raw2.t) (bb : Raw2.Set.t) = (aa = bb) Only the last line results in an error: Error: This expression has type Raw2.Set.t but is here used with type Raw2.t All the rest of the code compiles correctly. It means that types Raw1.t and Raw1.Set.t can be unified. My question is: why these nearly identical statements results in different behavior of the type t? I'd really prefer Raw1 and Raw2 to be identical. You just have to propagate the type by hand: module Set = struct module Make (Ord : Set.OrderedType) = struct include Set.Make(Ord) module Set : Set.S with type t = t = Set.Make(Ord) end end The type t = t do the trick. The first t is bound inside Set and the other comes from include Set.Make(Ord). Regards Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: SHA1 = stdlib ?!
Hello, On 24-04-2010, Oliver Bandel oli...@first.in-berlin.de wrote: is it planned, to also include SHA1-Hash into stdlib? What is the advantage of having SHA-1 in stdlib rather than in cryptokit for example? Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: SHA1 = stdlib ?!
On 24-04-2010, Oliver Bandel oli...@first.in-berlin.de wrote: Zitat von Grant Olson k...@grant-olson.net: On 4/24/2010 10:28 AM, Oliver Bandel wrote: What is cryptokit? A library with a bunch of cryptographic primitives, including SHA hashes... https://forge.ocamlcore.org/projects/cryptokit/ Cryptokit is written by X. Leroy, the same author as OCaml. There is a debian package for it (apt-get install libcryptokit-ocaml-dev), a Fedora package and a GODI package. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: ocamlcore.org not available
On 24-04-2010, Oliver Bandel oli...@first.in-berlin.de wrote: Hello, the pages http://ocamlunix.forge.ocamlcore.org/ are not reachable. Seems to be a DNS problem. DNS propagation problem, I think. I have a problem from 16:00 to 17:00 using orange DNS server. A ticket is open at OVH which hosts the DNS server that should propagate *.ocamlcore.org domain. I have a similar problem on 2010-03-09 at 22:00 for 2 hours. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Inspect libary
On 15-04-2010, Vincent Aravantinos vincent.aravanti...@gmail.com wrote: Le 15 avr. 10 =E0 12:42, Kaspar Rohrer a =E9crit : PS: Does somebody know why all of my browsers (Firefox, Safari, =20 Camino on OS X 10.6) do not recognize the Forge.ocamlcore.org server =20= certificate? I guess it's the same cause as this bug: http://forge.ocamlcore.org/tracker/index.php?func=3Ddetailaid=3D452group=_id=3D1atid=3D101= This is not about this bug. The server certificate has been issued by http://www.cacert.org If you add their root certificate, the certificate of forge.ocamlcore.org will be recognized. http://www.cacert.org/index.php?id=3 This is done by default on Debian for example. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Caml-inspect library
Hello, On 15-04-2010, Kaspar Rohrer kaspar.roh...@gmail.com wrote: I hope nobody takes offense over the fact that I chose Github over Forge.ocamlcore.org. Not at all, github is shiny and efficient to manage a git repository. A good solution, is to host your git/bug tracking on github and download section/website/news/mailing list on a forge.ocamlcore.org project. You just have to remove the SCM tab and redirect the homepage to github or write your own project homepage and put a link to github there. This way you can benefit of the best of each hosting service. Good luck with ocaml-inspect. Regards, Sylvain Le Gall ps: maybe one day we will be able to integrate nicely github with forge.ocamlcore.org and you will just have to hit the button Share my projects on github through forge.ocamlcore.org... Any taker send me an email ;-) ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Building ocaml on Win32 using VS 2008
On 14-04-2010, Lally Singh lally.si...@gmail.com wrote: Do you have a build procedure I could use? My own attempts have been rather terrible so far :-( I can confirm that I have no particular problems building ocaml 3.11.2 with MSVS 2008. On Wed, Apr 14, 2010 at 12:54 PM, Alain Frisch alain.fri...@lexifi.com wrote: On 14/04/2010 18:46, Lally Singh wrote: Has anyone had any success building ocaml on Win32 using VS 2008? We compile the win32 port with the Win7 SDK (Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 Service Pack 1). As far as I know, this SDK contains the same toolchain as VS 2008. And note that despite its name, the SDK is not related to Win7 at all: it works for older of Windows as well. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] [ANN] OASIS 0.1.0, ocamlify 0.0.1 and ocaml-data-notation 0.0.1
OASIS - This is the first public release of OASIS. It aims to provide a clean and efficient way to create a configure/build and install system for your OCaml applications and libraries using a single '_oasis' file. It is inspired by Haskell's Cabal. Features: * generate a standalone setup.ml which provides standard entry points in * the build system, * plugin system that allows to choose the best sub-system: OCamlbuild, * custom build (Makefile based)... * the file _oasis can be used as a metadata storage to help other tools * analyze your source code * customization of every piece of the generated build system by just * editing the files concerned * full OCaml script, no Unix call involved * tested on Linux and Windows Bonus features: * available in french, using ocaml-gettext * binary installers for Linux and Windows (32bits) Website: http://oasis.forge.ocamlcore.org If you want to contribute: http://oasis.forge.ocamlcore.org/contribute.html ocamlify ocaml-data-notation --- These two tools are needed to build OASIS. They are released in separate projects because I use it elsewhere and they are just pre-requisites of OASIS. ocamlify helps to include files as OCaml code. The beginning of a build rule can be copy-and-pasted from OASIS myocamlbuild.ml. http://darcs.ocamlcore.org/cgi-bin/darcsweb.cgi?r=oasis;a=headblob;f=/myocamlbuild.ml ocaml-data-notation, aka odn, dumps OCaml data in OCaml notation. It is inspired by JSON. It uses type-conv to create data dumper functions, you just have to add with odn in the type definition. There is no load scheme, since it is used to dump datastructure into OCaml scripts. It is mainly a code generator helper. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] [ANN] OCaml Meeting 2010, final notice
Hello all, When you will receive this email, you will have less than 24 hours to subscribe to OCaml Meeting 2010. We have less than 10 places remaining. Further information, inscriptions and already subscribed people: http://wiki.cocan.org/events/europe/ocamlmeetingparis2010 The day after OCaml Meeting, an OCaml hacking day will take place: Further information and inscriptions: http://wiki.cocan.org/events/europe/ocamlhackingdayparis2010 The subscription will be closed at midnight, Paris time. Regards, Sylvain Le Gall on behalf of the OCaml Meeting organization team. ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] [ANN] OCaml Meeting 2010, end of subscription is on next friday
Original announce: https://forge.ocamlcore.org/forum/forum.php?forum_id=572 Only 5 days before the end of subscription. We are already 60 people. For the third time, I am proud to invite all OCaml enthusiasts to join us at OCaml Meeting 2010 in Paris. This year event takes place in Paris on Friday 16th April 2010. Subscription is opened and will be closed on Friday 2nd April 2010. Presentations include: * Enforcing Type-Safe Linking using Inter-Package Relationships for * OCaml Debian packages * The Ocamlviz visualization toolkit * Cluster computing in Ocaml * Ocaml in a web startup * React, functional reactive programming for OCaml * OASIS, a Cabal like system for OCaml * OPA, same web, but with types and lambda * OC4MC, Objective Caml for MultiCore * Lwt, Cooperative Light-Weight Threads * naclgrid: the collaborative rendering farm, a JoCaml-powered desktop * grid The meeting is sponsored by INRIA, the Caml Consortium and OCamlCore. Inscription is free but the number of participants is limited. Further information and inscriptions:br http://wiki.cocan.org/events/europe/ocamlmeetingparis2010 The day after OCaml Meeting, an OCaml hacking day will take place: Further information and inscriptions:br http://wiki.cocan.org/events/europe/ocamlhackingday2010 Volunteers willing to help before/during these events can contact me directly. We are particularly looking for a video team. You can also forward this invitation to any groups that can be interested in (Haskell user group, CUFP mailing list...) For people who need further information, you can contact me (see wiki.cocan.org for contact details). Hope to see a lot of you Regards Sylvain Le Gall on behalf of the OCaml Meeting organization team. ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Shared memory parallel application: kernel threads
On 12-03-2010, Hugo Ferreira h...@inescporto.pt wrote: Hello, I have opted to use kernel-level threads that allow use of the (multi-core) processors but still allow easy access to shared memory. I have done a cursory look at: - Ocaml.Threads - Ocaml.Unix (LinuxThreads) - coThreads - Ocamlnet2/3 (netshm, netcamlbox) (An eThreads library exists in the forge but I did not examine this) I think you should also have a look at ocaml/mpi for communication: http://forge.ocamlcore.org/projects/ocamlmpi/ and ancient for accessing read-only memory: http://merjis.com/developers/ancient MPI can work on a single computer to take advantage of multi-core through multi-processus. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] [ANN] OCaml Meeting 2010, 3 weeks before end of subscription
Hello, For the third time, I am proud to invite all OCaml enthusiasts to join us at OCaml Meeting 2010 in Paris. This year event takes place in Paris on Friday 16th April 2010. Subscription is opened and will be closed on Friday 2nd April 2010. Presentations include: * Enforcing Type-Safe Linking using Inter-Package Relationships for OCaml Debian packages * The Ocamlviz visualization toolkit * Cluster computing in Ocaml * Ocaml in a web startup * React, functional reactive programming for OCaml * OASIS, a Cabal like system for OCaml * OPA, same web, but with types and lambda * OC4MC, Objective Caml for MultiCore * Lwt, Cooperative Light-Weight Threads * naclgrid: the collaborative rendering farm, a JoCaml-powered desktop grid The meeting is sponsored by INRIA, the Caml Consortium and OCamlCore. Inscription is free but the number of participants is limited. Further information and inscriptions: http://wiki.cocan.org/events/europe/ocamlmeetingparis2010 The day after OCaml Meeting, Mehdi Dogguy from PPS helps me to organize an informal day where OCaml teams can meet to work. We will have 2 classrooms, each can host 45 persons. There will be an internet access and a blackboard in each room. Inscription is free. Further information and inscriptions: http://wiki.cocan.org/events/europe/ocamlhackingday2010 Volunteers willing to help before/during these events can contact me directly. We are particularly looking for a video team. You can also forward this invitation to any groups that can be interested in (Haskell user group, CUFP mailing list...) For people who need further information, you can contact me (see wiki.cocan.org for contact details). Hope to see a lot of you Regards Sylvain Le Gall on behalf of the OCaml Meeting organization team. This is a forward of this announce: https://forge.ocamlcore.org/forum/forum.php?forum_id=558 ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: gc overhead
Hello, On 03-03-2010, Edgar Friendly thelema...@gmail.com wrote: On 03/02/2010 06:09 PM, Warren Harris wrote: On Mar 2, 2010, at 2:03 PM, Sylvain Le Gall wrote: You can have a look at: http://ocamlviz.forge.ocamlcore.org Thanks! This looks very promising. I'll give it a try. Overall, good job. But is it going to die or stay maintained? Well, I hope it will stay maintained. At least source code, bugs and release on the forge will stay there for a long time (I can make promise on this part). And whenever current developpers become inactive, OCamlCore.org administrators can move ownership to other (with notice to current owner, of course): http://www.ocamlcore.org/philosophy/ (point 4) But anyway, this kind of tool is targeted at debugging on the first place. It is not a mandatory piece of a software/library. You can lie without it, when you have finished your job debugging/profiling your program. So I would say that long term maintainance should not bother user for now. It is actually something that is lightweight and that works. To my mind this is enough to consider using it. If a lot of people start using it, it is highly probable that it will stay maintained. Regards Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: gc overhead
On 01-03-2010, Warren Harris warrensomeb...@gmail.com wrote: I would like to determine what percentage of my application's cpu time is spent in the garbage collector (for tuning purposes, but also just to monitor the overhead). Is there any way to obtain this information short of using gprof? Additional information provided by Gc.stat would be ideal, or perhaps a Gc.alarm that was called at the beginning of the gc cycle, but neither of these seem to exist. You can have a look at: http://ocamlviz.forge.ocamlcore.org This allow to instrument your code and watch GC activity. I think that with a little a little help on program side, you can be quite precise about GC without using gprof at all. This should also be more lightweight than gprof. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: [newbie] miscellaneous on installation and web site
Hello, On 01-03-2010, Marco Maggi marco.maggi-i...@poste.it wrote: Ciao, I am a True Beginner taking a look at O'Caml; I hope not to be abusing by posting here rather than the beginners list. I think I successfully compiled ocaml-3.11.2 on my i686-pc-linux-gnu, but there seems to be no way to install the package in a temporary location via the Linux de facto standard DESTDIR environment variable; is there a way to do it? (I am used to build custom packages.) If you are really a beginner, I will really recommend to you using your distribution OCaml packages, no matter if its ocaml 3.10.2 or 3.11.2. Debian and Fedora provide packages (apt-get install ocaml on Debian). The web site[1] is beautiful (no irony) but a lot of informations look outdated, 4/5 years old; I see many O'Caml related sites on the Net. Is there one that I can take as reference for the latest news, for example about still maintained library packages? [1] http://caml.inria.fr/ caml.inria.fr and the Hump is a pretty good place to start: http://caml.inria.fr/cgi-bin/hump.fr.cgi The site available here are also good points to start with: http://caml.inria.fr/resources/index.fr.html and especially http://www.ocaml-tutorial.org/ Then you have ocamlcore.org related websites: - http://www.ocamlcore.org: entry point of ocamlcore.org - http://planet.ocamlcore.org: for the latest (general) news of the OCaml community - http://forge.ocamlcore.org: participate to various OCaml projects or create your own Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: [newbie] miscellaneous on installation and web site
On 01-03-2010, Marco Maggi marco.maggi-i...@poste.it wrote: Marco Maggi wrote: So am I correct in saying that MLGMP is orphaned and no maintained GMP/MPFR/... package exists? Wait! Found something here: https://code.launchpad.net/~ubuntu-branches/ubuntu/lucid/mlgmp/lucid This is just Debian/Ubuntu people working on the packaging (not the library). But even if there has been no release for a while, it doesn't mean that it is orphaned or unmaintained... Try it to see if it is working. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: OCaml/C variant representation
On 28-02-2010, Jianzhou Zhao jianz...@seas.upenn.edu wrote: On Wed, Feb 24, 2010 at 11:42 AM, Sylvain Le Gall sylv...@le-gall.net wrote: On 24-02-2010, Jean Yang jeany...@csail.mit.edu wrote: Please have a look at: http://caml.inria.fr/mantis/view.php?id=4803 This section is misleading. You should use hash_variant for `VConstr. In your case VConstr of int will be Block with size = 1 and tag = 0; first non-constant constructor and first field contains Value_int(...) If I am creating an OCaml variant (string option) from C, say using 'alloc', does it matter which tag I am using for 'some'? Can it be only tag 0? I was looking at LLVM OCamling bindings, sometimes the 'some' is also of 'tag 1', which confused me. I think it is an error, but since there is only one possibility in the case of Some, maybe it is not important (i.e. you can distingish between the two variant None | Some just looking at the fact there are block or not). If my variant is A | B | C of int | D of int, does C have to start from tag 0? and D must be 1? Similarly, does A have to be assigned into Val_int(0), and B is from 1? Yes. At least this is what I understand from section 18.3.4 Concrete types of the OCaml manual. As a matter of fact, I never had problems following this convention before. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] [ANN] OCaml Meeting 2010 in Paris, 2nd call
This is a copy and paste version of: https://forge.ocamlcore.org/forum/forum.php?forum_id=532 For the third time, I am proud to invite all OCaml enthusiasts to join us at OCaml Meeting 2010 in Paris. This year event takes place in Paris on Friday 16th April 2010. Subscription is opened and will be closed on Friday 2nd April 2010. Presentations include: * Enforcing Type-Safe Linking using Inter-Package Relationships for * OCaml Debian packages * The Ocamlviz visualization toolkit * Cluster computing in Ocaml * Ocaml in a web startup * React, functional reactive programming for OCaml * OASIS, a Cabal like system for OCaml * OPA, same web, but with types and lambda As last year, participants are invited to give a talk on what they are doing with OCaml. You can submit a description of your talk on the wiki or contact me. The meeting is sponsored by INRIA, the Caml Consortium and OCamlCore. Inscription is free but the number of participants is limited. Further information and inscriptions: http://wiki.cocan.org/events/europe/ocamlmeetingparis2010 The day after OCaml Meeting, Mehdi Dogguy from PPS helps me to organize an informal day where OCaml teams can meet to work. We will have 2 classrooms, each can host 45 persons. There will be an internet access and a blackboard in each room. Inscription is free. Further information and inscriptions: http://wiki.cocan.org/events/europe/ocamlhackingday2010 Volunteers willing to help before/during these events can contact me directly. We are particularly looking for a video team. You can also forward this invitation to any groups that can be interested in (Haskell user group, CUFP mailing list...) For people who need further information, you can contact me (see wiki.cocan.org for contact details). Hope to see a lot of you Regards Sylvain Le Gall on behalf of the OCaml Meeting organization team. ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Being aware of memory overuse
On 10-02-2010, Dario Teixeira darioteixe...@yahoo.com wrote: Hi, I always wanted to have kernel spport for this. Some way for aplication to tell the kernel about freeable memory and for the kernel to request some memory to be freeed instead of swapping it out. If I recall correctly, there was an Lwn.net article reporting a lkml (the Linux kernel mailing list) discussion on that subject. One of the proposals was for the kernel to send processes a signal (SIGFREE?) requesting they free up memory (by running a major GC, for example) whenever memory was running low. In theory this could in some cases avoid the invocation of the draconian OOM killer. Question: just how effective such a feature would be in the Ocaml case? I forgot to tell about other paths I have followed: setrlimit/getrlimit. There are limits like RLIMIT_DATA, RLIMIT_RSS et al (CPU...). setrlimit limits memory by generating ENOMEM when limits are reached and getrlimit should give information about the current level of use of these limits. Unfortunately, the memory consumption I get with getrlimit is not accurate (in fact not updated). I have OCaml bindings for this, I should published in a near future. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: debugging memory leaks
On 29-01-2010, warrensomebody warrensomeb...@gmail.com wrote: I know this is an old thread, but I have revised the memprof patch to work with ocaml-3.11.2. Please let me know if there is a maintainer who would like to look this over and/or distribute it. Otherwise, I'll put it up on github or google code. Thanks, You could consider, putting your code on http://forge.ocamlcore.org This is probably the place where it will have the best visibility for other OCaml developers. Regards Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: ExtLib/Camomile UTF8
On 26-01-2010, Yoriyuki Yamagata yoriyuk...@gmail.com wrote: Also maybe you could host Camomile at forge.ocamlcore.org... What is the benefit of it? There are many benefits: - better visibility among other OCaml projects - beginners can easily find your library - people that don't know OCaml can easily see that they are many libraries for OCaml, just having a look at forge.ocamlcore.org - integration of news from your project directly into the feed of the forge which goes to planet.ocamlcore.org - people that could fill a bug report have a high probability to be subscribed to forge.ocamlcore.org for their own projects On the other hand, I don't like to criticize but Sourceforge is not cristal clear with UI (I agree that GForge/forge.ocamlcore.org is also not very good at this). Moreover, we do have a lot of problems with tracking new release of Sourceforge projects in Debian: we cannot easily access download section. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Bytecode run on AIX - unknown C primitive error
On 20-01-2010, Christoph Bauer christoph.ba...@lmsintl.com wrote: unfortunatly I haven't a solution for the bytecode stuff. I only use ocaml with native compiled code. This works very well. I confirm that ocamlopt/AIX works well (thanks to Christoph). The best solution is maybe to understand why ocamlopt cannot be built ? Regards Sylvain Le Gall Christoph Bauer From: caml-list-boun...@yquem.inria.fr [mailto:caml-list-boun...@yquem.inria.fr] On Behalf Of Dawid Toton Sent: Tuesday, January 19, 2010 9:32 PM To: caml-list@yquem.inria.fr Subject: [Caml-list] Bytecode run on AIX - unknown C primitive error I have installed part of this OCaml port http://home.arcor.de/chr_bauer/ocaml-aix.html on a computer running on AIX. It seems that everything built correctly except ocamlopt. So I have ocamlrun and standard library and this should be enough for bytecode to run. I have to build the bytecode on a different machine (because it's difficult to do on AIX). I believe this shouldn't induce any problems. Trivial bytecode executes correctly regardless where it is created. I set LIBPATH to point to ocaml/stublibs and try running some bytecode uning Unix module. This results in: Fatal error: unknown C primitive `unix_getsockopt_bool' If I compile simple let _ = Unix.sleep 1 on the target machine, I get bytecode that causes ocamlrun to crash with: Illegal instruction (core dumped) Does anybody have an idea for workaround? Some understanding what's going on? I'm using AIX 5.3 Dawid ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] [ANN] OCaml Meeting 2010 in Paris
For the third time, I am proud to invite all OCaml enthusiasts to join us at OCaml Meeting 2010 in Paris. This year event takes place in Paris and tries to avoid collision with all other events. It will be on Friday 16th April 2010. Subscription is opened today and will be closed on Friday 2nd April 2010. As last year, participants are invited to give a talk on what they are doing with OCaml, submit a description of your talk on the wiki or contact me. The meeting is sponsored by INRIA CAML Consortium and OCamlCore. Participation for lunch is covered by the Consortium, you just need to subscribe. The facility can only host 80 people, so we will have to filter the list of participants if there are more people. We will give priority to people giving a talk and coming from abroad. Volunteers to help before/during the event can contact me directly. We are particularly looking for a video team. You can also forward this invitation to any groups that can be interested in (Haskell user group, CUFP mailing list...) Further information: http://wiki.cocan.org/events/europe/ocamlmeetingparis2010 For people who need further information, you can contact me (see wiki.cocan.org for contact details). The day after OCaml Meeting, Mehdi Dogguy from PPS helps me to organize an informal day where OCaml teams can meet to work. There will be internet access and a blackboard in each room. We will have 2 classrooms (each classroom can host 45 persons). Inscription will is free, stay tuned. Hope to see a lot of you Regards Sylvain Le Gall on behalf of the OCaml Meeting organization team. ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: general question, was Re: OCaml is broken
On 21-12-2009, Keyan m...@pulsschlag.net wrote: Hi, i have a large project written in C++, for which i am planing to write add-ons and tools in ocaml, e.g. different tools to analyse my code (dependency stuff), an interpreter for a script-language i plan to include, etc, etc. form my time at the uni i remembered that ocaml allows to compile libraries which can be included in c/c++ program, and i know people who use it extensively in other projects. therefore, i decided to give ocaml a try. i like functional programming, and my first steps with ocaml are very promising. following this discussion, i am not so sure anymore, if ocaml is a good decision. may be i got this discussion wrong, but if ocaml is dying out, i might have to look for another functional programming language to use with my project. OCaml is not dying out at all (v3.11.2 is being prepared, v3.12.0 is coming soon). Of course, the core OCaml distribution (the one shipped by INRIA), is missing some features. You can use libraries/alternative compiler to have these features back (cothreads, jocaml, camlp3l). The only point of the whole discussion -- which is a recurring point by some of those who participate -- is the lack of shared-memory parallelism in the core language. Other languages like C or C++ are also lacking this support in their core definition... I.e. there is way to do it but you need to use pthread or Win32 thread. All in all, you can go a long way writing your tools with OCaml without encounting these problems. For the topic you describe, OCaml is a good choice. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: OCaml is broken
On 21-12-2009, Erik Rigtorp e...@rigtorp.com wrote: On Sun, Dec 20, 2009 at 17:18, Gerd Stolpmann g...@gerd-stolpmann.de wrote: Even if I want to process a dataset and partition it and sends the work to multiple processes there is no framework in OCaml for me to use. There are many frameworks at hand, just search for it: - ocamlp3l - jocaml - RPC with ocamlnet - cothreads - Ancient - OCamlMPI They maybe not look like exactly what you want, but they are close enough to do what you want. FYI, I have created a commercial application for sorting/processing big files using OCaml. It runs using multi-processes as fast as other commercial programs that do the same thing. In particular, it runs faster than another well-known program written in C, using threads on Windows and on Linux. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: OCaml is broken
On 19-12-2009, Erik Rigtorp e...@rigtorp.com wrote: Please fix OCaml! The first step would be to support multiple runtimes running in the same process communicating using message queues. You should take a look at: http://jocaml.inria.fr/ Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: What is CPAN? (was: Re: Hoogle for Ocaml)
On 03-12-2009, ri...@happyleptic.org ri...@happyleptic.org wrote: (1) A network of redundant mirrors which means you can always get the tarball you need, even when the original site is down: If I understand correctly, GODI site does not store any of the source tarballs, but the makefiles download the sources directly from their respective home, does it ? Can't we use the MASTER_SITE_BACKUP make variables to have one or several backup sites ? If it's usefull I can try to setup a server to download every possible source tarballs and serve as such a site backup. But would it be usefull ? Yes of course. You can use ocamlcore.org website to do that. I have already a proof of concept using uscan + Debian watch file, to scan for new upstream on a weekly basis. Send me a private mail, if you want to proceed. Once the website is setup, we can use rsync to propagate it (ssh.ocamlcore.org has rsync installed). Everything is ready on *.ocamlcore.org, we just need some volunteer to do the work. Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
[Caml-list] Re: Simple ocamlbuild example for C stubs?
On 28-11-2009, Guillaume Yziquel guillaume.yziq...@citycable.ch wrote: Hello. I'm trying to build a .cma with C stubs with ocamlbuild. Linking and includes are supposed to be set to non-standard directories. You probably need to add some 'A-ccopt; Ayour-option' to the good tag. Can you give more details/actual layout of your myocamlbuild.ml ? Regards, Sylvain Le Gall ___ Caml-list mailing list. Subscription management: http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list Archives: http://caml.inria.fr Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs
