Bill, On Wed, Oct 6, 2010 at 10:24 AM, Schwab,Wilhelm K <bschwab@anest.ufl.edu>wrote:
Miguel,
I do not "need" to make the call. I am wondering whether I can do so in a way that will benefit others, or I should just say the hell with it and either provide similar functionality a different way or provide the same functionality via a .so of my own creation. The latter is fine for me but does not do much for anyone else.
And let's say I make it and the thing seg faults. How can I tell the difference between a limitation of the plugin or a mistake on my part calling a fairly cumbersome function? The answer: I can't, not without work that I cannot justify doing when a ready solution exists.
You can. You're just too lazy to try. You need to read (at least) http://en.wikipedia.org/wiki/Reciprocal_altruism. I share Miguel's and Nicolas' impressions of you. I see you taking much more than you give and it's straining my patience. Eliot
Bill
________________________________________ From: pharo-project-bounces@lists.gforge.inria.fr [ pharo-project-bounces@lists.gforge.inria.fr] On Behalf Of Miguel Cobá [ miguel.coba@gmail.com] Sent: Wednesday, October 06, 2010 12:52 PM To: Pharo-project@lists.gforge.inria.fr Subject: Re: [Pharo-project] FFI number of arguments
El mié, 06-10-2010 a las 12:33 -0400, Schwab,Wilhelm K escribió:
Miguel,
I see it very differently: I do extensive searches and summarize the results, dropping keywords along the way that I wish had been present in what I finally uncovered somewhere else. The Pharo archives are then a more rich resource they than had been. I happen to know it works, because many of the helpful messages I find are in fact mine.
As for whether I could "easily" make the call in question: give me a break. It has roughly 20 arguments, and would be a fair amount of work to set up. If someone else knows one way or the other, it might trigger either a reply along the lines of "yeah, I did ti with 30 arguments" or "I fell for that, the plugin choked on...." Restating what I linked from another group is not helpful, nor is telling me how easy it would be to do something that you have never seen. Did it occur to you that there might be pointer arguments that would be a potential sources of complexity? You might read what I asked: "have you tried this?" Not "please do this for me." It would be wasteful to attempt the call without asking for scouting reports.
But in the end if you really need to use that call, either it works or don't, you'll need to write it, even if someone says that it doesn't work. Why, because you need it, and if you don't need it then your question is rhetoric, because you don't even mind the answer. You can't ask for advise for every and each step you take, most times you should walk away, _fix_ what you find wrong and then report back the fix. That would really make the archives more rich because you are contributing back real knowledge and maybe code and not just polluting the archives with threads that ask things but solve nothing for anyone but you.
Cheers
Bill
________________________________________ From: pharo-project-bounces@lists.gforge.inria.fr [ pharo-project-bounces@lists.gforge.inria.fr] On Behalf Of Miguel Cobá [ miguel.coba@gmail.com] Sent: Wednesday, October 06, 2010 12:13 PM To: Pharo-project@lists.gforge.inria.fr Subject: Re: [Pharo-project] FFI number of arguments
El mié, 06-10-2010 a las 11:50 -0400, Schwab,Wilhelm K escribió:
Levente,
What problem do you have with asking whether someone else has already tried it? Really, have you not seen examples of working hard on advice from one source only to discover yet another limit that was not in fine print?
But Bill, almost all your questions are long and without apparent focus on the real point. Some other times are like this, things that you could easily test by yourself maybe in less time that takes you to write so many words, send the email and wait for a response from someone willing to decipher what the real problem is. Other times you point at problems that you find in your environment without giving better hints than "in a hopefully updated image", "in a, I think, not modified image", "in my machine", that doesn't help in helping you. Then you point some problems that it appears that are very evident to you and whose solution is also very obvious to you but you don't provide a fix for them neither, like the always topic of yours about sockets.
Then when someone points and the obvious things you should do (your homework, in verifying yourself what you are asking to the list) or to precise the information needed to better answer you, you respond upset as if anyone should be obliged to answer you or even read your mails.
So, please, read
http://www.catb.org/esr/faqs/smart-questions.html
do your homework and then ask the list.
________________________________________ From: pharo-project-bounces@lists.gforge.inria.fr [
pharo-project-bounces@lists.gforge.inria.fr] On Behalf Of Levente Uzonyi [ leves@elte.hu]
Sent: Tuesday, October 05, 2010 11:09 PM To: Pharo-project@lists.gforge.inria.fr Subject: Re: [Pharo-project] FFI number of arguments
On Tue, 5 Oct 2010, Schwab,Wilhelm K wrote:
yes, that's what the link describes. The open question is whether anyone has successfully done that with 15+ arguments?
It works up to 128 arguments. But why don't you try it yourself?
Levente
________________________________________ From: pharo-project-bounces@lists.gforge.inria.fr [
pharo-project-bounces@lists.gforge.inria.fr] On Behalf Of Levente Uzonyi [ leves@elte.hu]
Sent: Tuesday, October 05, 2010 10:26 PM To: Pharo-project@lists.gforge.inria.fr Subject: Re: [Pharo-project] FFI number of arguments
On Tue, 5 Oct 2010, Schwab,Wilhelm K wrote:
Hello all,
I have been bumping into some functions with large numbers of arguments. One in particular would be best handled in the image if at all possible. The following might be the answer:
http://thread.gmane.org/gmane.comp.lang.smalltalk.squeak.general/98538/focus...
Have any of you done this with >15 (or whatever the cutoff is)
arguments?
You can create your own function object and invoke it with an array. Here's an fprintf example on windows:
fprintf := ExternalLibraryFunction name: 'fprintf' module: 'msvcrt.dll' callType: ExternalFunction callTypeCDecl returnType: ExternalType signedLong argumentTypes: { (ExternalType structTypeNamed: #FILE) asPointerType. ExternalType string. ExternalType signedLong }. file := Stdio default fopenWith: 'test.txt' with: 'w'. fprintf invokeWithArguments: { file. 'Your number is %d.'. 42 }. Stdio default fcloseWith: file.
Levente
P.S.: Note that you need the FILE and Stdio classes to run this example.
Bill
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