hummm very nice, i never tried to write a udf with go going back to daemond plugin, i'm with some doubts, i could make a daemond, i could make a information schema both are "easy" my doubt now is how to get data from daemond with information schema plugin, that's something that i don't know how to solve yet
i'm reading the show plugins function and trying to understand how to do this, but no results yet 2015-10-04 17:51 GMT-03:00 Nirbhay Choubey <nirb...@mariadb.com>: > Hello, > > On Sun, Oct 4, 2015 at 9:05 AM, Guillaume Lefranc < > guillaume.lefr...@mariadb.com> wrote: > >> Hi Roberto, >> >> you could have a try at it with Golang, it can wrap C code easily >> https://golang.org/cmd/cgo/ >> >> > Though with Go1.5 its now possible, uninstalling the plugins still leads > to segfaults. > And sadly, looks like it can't be fixed (not in near future, at least). > > https://github.com/golang/go/issues/12582 > > Best, > Nirbhay > > > Best regards, >> >> Guillaume Lefranc >> RemoteDBA Services Manager - MariaDB Corporation Ab >> >> On Sun, Oct 4, 2015 at 3:26 AM, Roberto Spadim <robe...@spadim.com.br> >> wrote: >> >>> hummm, it's like creating a ".dll" that export functions to other >>> program call it? in this case your fast bit UDF functions export init/denit >>> functions to mysql, right? and you are using C++ or C language when you use >>> "extern"? i don't know how compiler know if it's a C or C++ code >>> >>> 2015-10-03 20:36 GMT-03:00 Justin Swanhart <greenl...@gmail.com>: >>> >>>> extern "C" { >>>> >>>> Makes the function use CDECL calling conventions, which is equivalent >>>> to setting the .NET code to use CDECL calling conventions. Any language >>>> that supports exporting symbols with CDECL calling conventions supports >>>> interoperating with C (it stands for C declarations aka C calling >>>> conventions). >>>> >>>> --Justin >>>> >>>> Sent from my iPhone >>>> >>>> On Oct 3, 2015, at 1:57 PM, Roberto Spadim <robe...@spadim.com.br> >>>> wrote: >>>> >>>> sorry guys, i'm a bit confuse about c++ and c >>>> >>>> i'm reading your fastbit udf code >>>> >>>> at /fb_udf.h >>>> you have a C code, right? >>>> and at fb_udf.cpp a c++ code >>>> >>>> you can mix c and c++ at the same code? >>>> >>>> >>>> at udf.h >>>> what this do? >>>> >>>> " >>>> extern "C" { " >>>> those functions should be undestood as "C" instead of "C++", or >>>> compiler should "export" those c++ function to "C" "code", or something >>>> related to C and namespaces ? >>>> >>>> sorry it's not mysql specific but i'm not finding some C++ plugins >>>> examples >>>> >>>> >>>> 2015-09-21 13:43 GMT-03:00 Roberto Spadim <robe...@spadim.com.br>: >>>> >>>>> :D nice >>>>> what i will is something like: >>>>> >>>>> 1) a plugin daemon that receive a tcp/ip connection with a double >>>>> linked list "feed" (something like: clear list, delete from position x to >>>>> y, delete position x, insert at position x, update position x, move >>>>> position x to y) >>>>> 2) save this feed to a myisam/spider/innodb/anyother engine (i'm >>>>> thinking about using a mysql handler api) (i didn't check how it works, >>>>> but >>>>> i think handler sock use it) >>>>> 3) keep the double linked list at memory (reconstruct the list when >>>>> server shutdown, maybe make some snapshots to avoid a long reconstruct, >>>>> something like after X lines of feed, save the list, or after x minutes) >>>>> 4) a engine to read the double linked list at memory (i don't know yet >>>>> how do this, but i will need some control about reading a shared memory, >>>>> how to access this shared memory from daemon plugin using storage engine) >>>>> 5) a engine to read information about what daemon is doing (like 4) >>>>> 6) at same plugin daemon, create a tcp/ip connection to "export" the >>>>> same feed to others users (just a proxy, not a big problem) >>>>> >>>>> at top level i think i will have 1 daemon plugin + 1 storage engine >>>>> plugin >>>>> >>>>> i'm thinking about c++ 11 cause it have double linked lists, threads, >>>>> atomic, sockets, and i dont need others libs (maybe i'm wrong, but that >>>>> was >>>>> my first impression about c++11) >>>>> >>>>> 2015-09-21 13:34 GMT-03:00 Justin Swanhart <greenl...@gmail.com>: >>>>> >>>>>> Hi, >>>>>> >>>>>> My fastbit UDF use C++ 11 no problem. >>>>>> >>>>>> https://github.com/greenlion/FastBit_UDF >>>>>> >>>>>> On Fri, Sep 18, 2015 at 11:52 PM, Sergei Golubchik <s...@mariadb.org> >>>>>> wrote: >>>>>> >>>>>>> Hi, Roberto! >>>>>>> >>>>>>> On Sep 18, Roberto Spadim wrote: >>>>>>> > guys , i'm still with doubts... but not more about c#, now about >>>>>>> c++ >>>>>>> > i was thinking about rewrite the code with c++ >>>>>>> > >>>>>>> > my doubt is.... could i use C++ 11 ? or i will have problem with >>>>>>> mariadb >>>>>>> > makefiles etc etc? >>>>>>> >>>>>>> Sure, you can use any language you want, C++11 is perfectly fine >>>>>>> too. >>>>>>> cmake doesn't care. >>>>>>> >>>>>>> Regards, >>>>>>> Sergei >>>>>>> >>>>>>> _______________________________________________ >>>>>>> Mailing list: https://launchpad.net/~maria-discuss >>>>>>> Post to : maria-discuss@lists.launchpad.net >>>>>>> Unsubscribe : https://launchpad.net/~maria-discuss >>>>>>> More help : https://help.launchpad.net/ListHelp >>>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> -- >>>>> Roberto Spadim >>>>> SPAEmpresarial - Software ERP >>>>> Eng. Automação e Controle >>>>> >>>> >>>> >>>> >>>> -- >>>> Roberto Spadim >>>> SPAEmpresarial - Software ERP >>>> Eng. Automação e Controle >>>> >>>> >>> >>> >>> -- >>> Roberto Spadim >>> SPAEmpresarial - Software ERP >>> Eng. Automação e Controle >>> >>> _______________________________________________ >>> Mailing list: https://launchpad.net/~maria-discuss >>> Post to : maria-discuss@lists.launchpad.net >>> Unsubscribe : https://launchpad.net/~maria-discuss >>> More help : https://help.launchpad.net/ListHelp >>> >>> >> >> _______________________________________________ >> Mailing list: https://launchpad.net/~maria-discuss >> Post to : maria-discuss@lists.launchpad.net >> Unsubscribe : https://launchpad.net/~maria-discuss >> More help : https://help.launchpad.net/ListHelp >> >> > -- Roberto Spadim SPAEmpresarial - Software ERP Eng. Automação e Controle
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