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[!REBOL3 Extensions] REBOL 3 Extensions discussions

Maxim
20-Jul-2010
[1110x4]
the current code is a single ~16kb file,  so its not too large right 
now.


obviously as more types are added, this will grow, but since I'm 
using a "rebol-formatted intermediate source tree", its easy to improve.


the parser just generates a version of the C source in this "RFIST" 
format, and the generator only has to convert this into something 
else.


in time, we might even build different emitters for the "RFIST" data.
limitiations, well, just the scope of supported datatypes, both in 
C and in REBOL commands.
others than that its working very well.
one fun thing is that we do not have to use the C source types as 
the interfaces for the commands.

my next test is to build a generic object to parameter map.

so, if you have a C func declared as:
int myFunc (int a, int b)

you'll be able to call it from rebol using:

obj: context [a: 1 b: 2]
myFunc obj
TomBon
20-Jul-2010
[1114]
yes please! :))
Maxim
20-Jul-2010
[1115]
its funny how the extension API feels like writting assembly  :-D
Graham
20-Jul-2010
[1116]
@Carl .. you called my suggestion insane, and now you post this blog 
http://www.rebol.net/r3blogs/0327.htmlsaying that you will do it 
anyway!
Maxim
20-Jul-2010
[1117x2]
he's being pressured by everyone   :-)
he feels the love   ;-D
Graham
20-Jul-2010
[1119]
Ok, so join the asylum ...
Maxim
20-Jul-2010
[1120]
and my tests (with a fix or two)  and successfull builds probably 
helped him be a bit more confident.
Graham
20-Jul-2010
[1121x7]
daily or perhaps less frequently releases are the way to go
this is a genetic approach :)
And my other suggestion about releasing a linux version also still 
stands
The linux users tend to be more experienced and yet they are being 
excluded in this process
The rebol 2.7.7 View problems on linux were reported way back and 
it' s only now that they are being addressed ...
We should parallelize testing and development.
As for flooding curecode with tickets ... I've already offered my 
Jira instance to be used until the hostkit has been stabilized
Maxim
20-Jul-2010
[1128]
my extension building engine will probably be released tomorrow. 
  its currently building extensions which are 100% functional.


now I will add more types and implement the command interface directive 
so that we can mutilate how C code is bound on the REBOL side.
Graham
20-Jul-2010
[1129]
So, Robert .. where is the A101 build?
Maxim
20-Jul-2010
[1130x2]
Carl has to merge some of my fixes first.
cause right now you can't compile extensions as DLLs... a small side-effect 
of the implementation of pair floats.... just related to linking.
Graham
20-Jul-2010
[1132]
Eh??  Of course you can compile extensions as DLLs... that's done 
outside of Rebol. But A101 won't allow you to use them any more?
Maxim
20-Jul-2010
[1133]
no the hostkit release broke this capability when you compile the 
DLL, there is a problem in the order of #include... but its fixed, 
will be part of release... which Carl has confirmed is happening 
very soon (probably today)
Graham
20-Jul-2010
[1134]
So A102 is out today?
Maxim
20-Jul-2010
[1135x2]
it will be v101
and yes probably, but I can't talk for carl, but he seems commited 
to doing it.
BrianH
20-Jul-2010
[1137]
Carl is doing the release because Maxim committed to doing the testing. 
This means Maxim gets the prereleases, and we get the releases.
Maxim
20-Jul-2010
[1138x2]
its funny because the #include bug left me in rage as I was trying 
to fix my makefile (I'm VERY poor at this stuff) .


but 2 hours later, editing my scripts, makefiles and stuff, I can 
say that I've grown to understand make quite well... 

so this bug ended up being a good thing  :-)
I feel like this release is my own pet release... Carl added the 
object! handling in extensions just for me... so I felt a certain 
responsability in working with carl to test it.
Graham
20-Jul-2010
[1140x2]
Is the only way for an extension to communicate back to r3 is by 
altering the frame parameters?
Is there no way for an extension to call a R3 function?
Maxim
20-Jul-2010
[1142x2]
not safelly. 


 while in the command, if you run arbitrary code, the GC might swap 
 the references you have while your in the command.  so that when 
 you return values, the data they used to refer ot do not exist anymore!
man exceptions are quick. 


more than 4 million adds a second, even though the values are cast 
to 32 bits and its using a stub (it jumps into a C function from 
a library) .
Graham
20-Jul-2010
[1144x3]
Seems like I should be able to call Qt's sql or network functions
So this http://doc.trolltech.com/3.3/sql.html#4should work for 
DB access for R3
But I guess you're going to have to open and close a new connection 
for each query which is not very satisfactory
Carl
20-Jul-2010
[1147x5]
http://www.rebol.com/r3/downloads/r3-host-kit-a101.zip
And, thank Maxim for his help on testing it.
And see my general rant at:
http://www.rebol.net/r3blogs/0327.html
Ah, I see Graham posted it.  Yes, insane. the pressure... was... 
too... intense.
So, now with that out, let me see about getting the posix release 
too... then one of you can port the graphics to X win.
Maxim
20-Jul-2010
[1152x3]
I want an Amiga version...   ;-)
and it has to run faster than the PC version which has a 1000 times 
faster CPU  ;-D
funny thing is that getting an amiga version to work probably would 
take the least time of all OSes... its so clean.
Graham
20-Jul-2010
[1155x4]
And least useful too
If you import one extension which has an exported function such as 
test and then import a different extension which has the same test 
function, it only recognizes the first.
Also how do you "unload" an imported dll?
Are extensions imported into the global namespace?
Maxim
20-Jul-2010
[1159]
only if the commands are in the export list.