Re: [Mono-list] P/Invoke, Mono, .NET and Windows XP funny platform
First of all, thanks for your reply. It have been really productive. Some issues about your reply: Your fundamental problem is that you're targeting Windows XP. Ha ha only serious. (A colloquialism for that's funny, but I'm serious too...) The slightly longer explanation is here: http://www.mono-project.com/Interop_with_Native_Libraries#Windows_DLL_Search_Path The real explanation is that Win32 is broken when it comes to supporting multiple different versions of the same library. Absolutely, fundamentally, *broken*. More to the point, it doesn't support this AT ALL -- you can only have ONE version of any given library in use at any point in time. Win32 has three issues you're running into: 1. No built-in versioning support for libraries, as noted above. Which is to say, if you load C:\Windows\System32\OLE32.dll, you can't say that you want version 1 or version 2 of that library, you get whichever version is at C:\Windows\System32\OLE32.dll. 2. This doesn't mean you can't have multiple different versions installed. It just means that each different version needs to reside in a different directory, which leaves you the option of (a) always specifying a full (or relative) directory for your library, or (b) accepting the default path and placing your library into an appropriate location. So if you didn't like Microsoft's OLE32.DLL, you could place a copy into your application's directory, and *that* one would get loaded. Alas, this means you can have the scenario you're describing, where both mono and your app bundle glib. This is unfortunate, because of issue (3). 3. Win32 doesn't keep track of the full path name to a library. It only remembers the basename of the library. Translation: If you LoadLibrary() C:\mono\glib.dll, Win32 will know that it's loaded glib.dll. If you then LoadLibrary() C:\yourapp\glib.dll, Win32 will hand you back a handle to C:\mono\glib.dll, because they both share the same basename (glib.dll) -- C:\yourapp\glib.dll is NOT loaded. Win32 doesn't operate on full paths. This is a feature (in certain contexts, anyway -- it's what allows you to provide your own version of OLE32.dll, or any other system library, and have it be used). So, to answer your questions... On Thu, 2005-06-09 at 19:23 +0200, Francis Brosnan Blzquez wrote: * Any application which p/invokes libraries that are also provided by mono must compile its native dll versions against the mono dll or it is posible to compile these ones against, for example, a glib not provided by the mono installer? Is it possible? Yes. But to use your version of glib and not mono's version, you'd need to alter the library search order for mono to ensure it loads your version of glib and not mono's. This probably is bad, because it will effect every application started with mono, and your glib might not be compatible with mono's glib, which would (likely) kill mono instantly. So it's possible, but it's not advisable. :-) Plus, it'll use extra disk space, so it would be nicer to use mono's glib anyway... The space impact that may have including several libraries using different names don't worry us. But setting a dependency against the mono libraries, such as libglib-2.0, force us to run over Mono and only over it. As you pointed following, the library renaming could be a solution to be able to run on top of Mono and microsoft .NET runtime. Alternatively, name your glib.dll with a different basename, e.g. af- arch-glib.dll, and rebuild all your libraries against this basename. About the library renaming issue. Renaming library basename could help us to find a solution to build application that can run on top of mono and .NET runtime ensuring the libraries the af-arch framework relies on will allways be loaded using the dll version we have used (appending the af-arch-) on develop stage. My question is: Could this confuse the windows dinamic library loading to load a library called glib.dll and another one called af-arch-glib.dll both exporting the same symbols? In other words, while running applications using .NET and doing P/Invoke over the af-arch-glib.dll the LoadLibrary will find it with no problem as well the Mono enviroment will do but, in the case of Mono, it have the glib.dll already loaded exporting the same (or mostly) symbols leading to have loaded into memory two version for the same entry point. Using as follow [DllImport(af-arch-glib)] will ensure the .NET runtime as well as Mono to load the af-arch-glib.dll library. But will this also guide both runtimes to differenciate the symbols exported from glib.dll and those ones from af-arch-glib.dll? * What happens if the mono runtime detects a P/Invoke over a library A.dll which depends on B.dll and then another P/Invoke over the library C.dll which depends on B'.dll knowing that B.dll and B'.dll are the same library but
Re: [Mono-list] Cygwin woes
Hi, Using Cygwin allows you to compile against cygwin1.dll library or using mingw interface (-mno-cygiwin) to compile against msvcrt.dll. But, you can not mix dlls compiled from different method. Check out the cygwin fac. What is happening is that your dll test.dll is compiled against cygwin1.dll (by using the second method) and mono is compiled against msvcrt.dll. You can also use objdump -p /path/to/the/binary to see against what dll is compiled some program. On windows, if you still want to use cygwin you need to use -mno-cygwin. .-Francis -- Francis Brosnan Blázquez [EMAIL PROTECTED] ___ Mono-list maillist - [EMAIL PROTECTED] http://lists.ximian.com/mailman/listinfo/mono-list
Re: [Mono-list] Re: Calling back from unmanaged code to managed code.
} Conclusion: 1) Maybe this is a mono problem. I'm not agree with this because implement a general solution will requiere an effort which won't be corresponded with the functionality gained. 2) In the case mono support this, I will strongly recommend not to relay on it because you'll be mono-specific. 3) With this solution you have increased your C-API functionality by giving it a synchronous version. 4) with this solution you have an really simple to understand .NET class api which allows consumer to choose how to invoke it. 5) Finally, think about events. C Asynchronous API only support to callbacks only one delegate. [1] Managed and Unmanaged Threading in Microsoft Windows http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconmanagedunmanagedthreadinginmicrosoftwindows.asp [2] Asynchronous programming overview http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpovrasynchronousprogrammingoverview.asp [3] Managed and Unmanaged Code Integration http://www.jprl.com/~jon/interop.html -- Francis Brosnan Blázquez [EMAIL PROTECTED] ___ Mono-list maillist - [EMAIL PROTECTED] http://lists.ximian.com/mailman/listinfo/mono-list
[Mono-list] Re: [Gtk-sharp-list] reusing windows using attribute [Widget]
Hi Javier, Once an window is showed you should catch delete-event and hide it yourself to avoid the window from being destroyed by the gtk engine. Thus, you can later show again the window by using window.Show (); Another approach, which I prefer since we are working in a managed environment, is to have one class per window with its glade loading stuff and do nothing for delete-event. Every time you need to launch a window simply create a new instance. .-Francis ___ Mono-list maillist - [EMAIL PROTECTED] http://lists.ximian.com/mailman/listinfo/mono-list
Re: [Mono-list] Platform invoke for stdarg
El lun, 15-11-2004 a las 20:54 -0500, Jonathan Pryor escribió: On Mon, 2004-11-15 at 20:24 +0100, Francis Brosnan Blázquez wrote: Hi, I'm trying to do a P/Invoke call for functions such as void Test(int value, ...); But I don't get it working. Is it posible to do a platform invoke for c functions that make use of stdarg api? No, and Maybe. :-) There is no general way to marshal ... parameters, which requires that all the parameters be passed on the stack -- the Cdecl calling convention. The .NET marshaller can only work with a fixed number of arguments. However, there are two solutions: 1. Standard overloading: If there is a reasonable number of parameters you need, you can explicitly specify them as overloads. I do this in Mono.Posix to wrap open(2): DllImport (libc, CallingConvention=CallingConvention.Cdecl) public static extern int open (string pathname, int flags); DllImport (libc, CallingConvention=CallingConvention.Cdecl) public static extern int open (string pathname, int flags, uint mode); If you plan on using this code on Windows, you *must* specify CallingCOnvention.Cdecl, as the default is Stdcall, which doesn't permit variable argument lists. Obviously, this is only viable if you have a limited number of potential overloads. Wrapping printf(3) is impractical, as it could result in hundreds (thousands?) of overloads. 2. Get creative, take an object[] array, and generate some System.Reflection.Emit code which accepts the proper number of parameters of the proper type, and invoke the recently generated code. IIRC cocoa-sharp does something similar to this for its msg_send implementation. Pro: it works for any argument list. Con: it's not easy. This solution sounds good. Thanks for your clear reply! - Jon -- Francis Brosnan Blázquez [EMAIL PROTECTED] ___ Mono-list maillist - [EMAIL PROTECTED] http://lists.ximian.com/mailman/listinfo/mono-list
Re: [Mono-list] Mono C# bindings index
El vie, 22-10-2004 a las 17:07, Fabien Meghazi escribió: Microsoft released their .net wiki under an OSS license and it is hosted on sourceforge. Well, whatever which platform is used for this wiki, perhaps this is the good place in order to ask who would accept to participate to this project. First of all we need to find where to host this wiki. Someone have an idea about that ? Why not on www.mono-project.com? ___ Mono-list maillist - [EMAIL PROTECTED] http://lists.ximian.com/mailman/listinfo/mono-list ___ Mono-list maillist - [EMAIL PROTECTED] http://lists.ximian.com/mailman/listinfo/mono-list
[Mono-list] Re: [Gtk-sharp-list] Problem with Gnome.About
Hi Sergio, If you include images as resources you should try to use: Gdk.Pixbuf pixbuf = new Gdk.Pixbuf (null, avispa.png); Cheers. .-Francis. ___ Mono-list maillist - [EMAIL PROTECTED] http://lists.ximian.com/mailman/listinfo/mono-list
Re: [Mono-list] Where is glib-sharp?
El sáb, 16-10-2004 a las 03:51, Kevin White escribió: I am trying to compile the example from http://www.gotmono.com/docs/gnome/bindings/gtk-sharp/packingdemonstrationprogram.html to learn how to use GTK# and am having a problem. When I type: mcs -pkg:gtk-sharp,glib-sharp -r:System.Drawing packer.cs I get errors that the glib-sharp.pc cannot be found (indeed this does not exist on my system, though glib-sharp files exist in the gac). When I type: mcs -pkg:gtk-sharp -r:System.Drawing,glib-sharp packer.cs I get errors that it cannot find the assembly 'glib-sharp'. So how do I properly compile an example such as this? I really want to learn gtk# and this site of tutorials has more examples than the mono site. I'm used to winforms programming through vs.net, so this will take some getting used to with mono. Any help is appreciated. Hi Kevin, I have the same problem when I was trying to compile tomboy a month ago. Is just a problem of your gtk-sharp version. Try to install the latest stable version. In my mono install there is no glib-sharp to reference to, so it must work by using only gtk-sharp reference. IHIH Thanks, Kevin -- Kevin White [EMAIL PROTECTED] ___ Mono-list maillist - [EMAIL PROTECTED] http://lists.ximian.com/mailman/listinfo/mono-list -- Francis Brosnan Blázquez [EMAIL PROTECTED] Advanced Software Production Line, S.L. ___ Mono-list maillist - [EMAIL PROTECTED] http://lists.ximian.com/mailman/listinfo/mono-list
[Mono-list] Enum problem
Hi.
Working with enumerations I've found an strange behaviour. If you
compile the following source code and run it:
--
using System;
public class EnumTest {
public enum TipoCarga {
Positivo = 1/3,
Negativo = 1 + (1/3),
Neutro = 1,
}
public static void Main () {
TipoCarga carga;
carga = TipoCarga.Positivo;
Console.WriteLine (carga value is: {0}, carga);
carga = TipoCarga.Neutro;
Console.WriteLine (carga value is: {0}, carga);
carga = TipoCarga.Negativo;
Console.WriteLine (carga value is: {0}, carga);
}
}
--
You get the following output:
carga value is: Positivo
carga value is: Neutro
carga value is: Neutro
That is, on every assignment which uses TipoCarga.Negativo doesn't work.
I've been reading about how enumerations works and seens to be that you
can only use values from byte, sbyte, short, ushort, int, uint, long, or
ulong types but not float or double types which can hold values as 1/3
and 1 + (1/3).
The odd thing is that assignment for Positivo = 1/3 works perfectly.
Maybe mcs mustn't allow someone to compile the previous source code?
.- Francis
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[Mono-list] Using the mono jay parser
Hi, We are developing an application using mono which have to parse molecular definitions written in Smiles format. We have already use bison and flex tools to produce scanners and parsers before, so we want to keep doing the same ;). We have started to figure out how mono uses the jay modified version to produce its c# parser but we are having some problems. One problem is that we don't find how mono produces its scanner. What lexer is mono using?. The other problem is that we haven't found much documentation on how to use jay (not how to use lex and yacc languages) to produce a parser. It would be great to have some guidelines to start. Anything will be appreciated: files to look, ideas, concepts on how to use your modified jay... Cheers, -- Francis Brosnan Blázquez [EMAIL PROTECTED] Advanced Software Production Line, S.L. ___ Mono-list maillist - [EMAIL PROTECTED] http://lists.ximian.com/mailman/listinfo/mono-list
