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<fengshaun>
is there a better way to keep a hunchentoot web app alive rather than (sleep most-positive-fixnum)?
<fengshaun>
I'm thinking bordeaux-threads should be used to join the main hunchentoot thread? not sure how to go about that or where to look
<jackdaniel>
something something condition-wait exit-condition is another way to do that
<fengshaun>
thanks, I'll looking it
<fengshaun>
look into*
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<jackdaniel>
but (loop (sleep most-positive-fixnum)) is not a bad way to do that imo
<fengshaun>
doesn't feel right, but I guess nothing is wrong with it
<beach>
How does sleeping keep an application alive?
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<fengshaun>
sb-thread:list-all-threads shows "hunchentoot-listener-*:8080", so I could wait for that thread, but sleep should do.
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<fengshaun>
beach, hunchentoot runs a thread in the background and returns immediately, so the main thread exits and everything dies
<jackdaniel>
beach: if your main thread calls a function like (defun start () (do-something) (spawn-listener) (call-user-function) (exit)) then the way to not exit immedietely is to put something blocking in call-user-function
<beach>
I see.
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<fengshaun>
oh nice, asdf:make works too! so close!
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<mivanchev>
hey, does anyone know of a CFFI trick to mask a C array as a lisp array?
<tuck>
mivanchev: Perhaps some implementation would be able to do that, but in general, or in portable code, the best you can do is to implement operators named with symbols with the same names as CL array operators, to access the C array thru CFFI, as a C array. Basically, you can hide the fact that you are using CFFI:MEMREF behind a C:AREF at most.
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<tuck>
You can also implement C:AREF to fork off to CL:AREF if passed a lisp array, so you can just (:use "CL" "C") (:shadowing-import-from "C" "AREF").
<tuck>
mivanchev: it's probably not worth the work in general. Just use cffi:memref.
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<mivanchev>
tuck, that'[s what i end up doing
<mivanchev>
but this code is performance critical ;/
<ixelp>
lisp/clext/pkcs11 at master · informatimago/lisp
<tuck>
For performance, you want to avoid crossing the C-lisp border, since it has to convert all the data arguments everytime. Even simple int must before integer and vice-versa.
<tuck>
So you may want to write the performance function in C.
<mivanchev>
Hard, I am writing a new StumpWM TTF module based on SDL2_ttf
<mivanchev>
can't really write it in C
<mivanchev>
let's see how bad it performs
<tuck>
Perhaps it's too early to think about performance? Make it work first. And then profile it.
<jackdaniel>
mivanchev: are you aware that McCLIM has a native common lisp ttf renderer implemented and working?
<mivanchev>
yes
<jackdaniel>
(and quite performant at that)
<mivanchev>
I am
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<jackdaniel>
OK, then I won't shill it :)
<mivanchev>
thanks though :)
<mivanchev>
I believe it's better to use SDL2 (for me) because the whole planet is involved in the dev
<jackdaniel>
btw, there's sdl3 released already
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<mivanchev>
yes i know jackdaniel :D
<jackdaniel>
good!
<jackdaniel>
there's nothing I can teach you then, go and change the world ,P
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<mivanchev>
jackdaniel, how to specify a dword for an element type?
<mivanchev>
this you can teach me
<mivanchev>
to get around The value 4323455642275676168 is not of type
<mivanchev>
<mivanchev>
(unsigned-byte 4)
<jackdaniel>
in common lisp array? the best you can probably do is a fixnum
<jackdaniel>
or unsigned-integer 64 / 32 depending on arch
<jackdaniel>
scratch the part about depending on arch, braino
<mivanchev>
is not of type fixnum now
<mivanchev>
too big?
<jackdaniel>
that depends on the architecture
<jackdaniel>
on my host it is a fixnum
<mivanchev>
say it is an unsigned-byte 4
<mivanchev>
how to assign that?
<jackdaniel>
usurally the fixnum uses width-of-a-pointer minus 2 or 3 bits
<jackdaniel>
I don't understand your problem
<mivanchev>
I want a lisp array that can hold 32bit dword values
<mivanchev>
with colors from SDL2
<jackdaniel>
the representation of integers in the foreign land may be and very likely will be different than lisp's
<jackdaniel>
you probably want something like (cffi:convert-from-foreign #<your-dword> :unsigned-long)
<jackdaniel>
or :unsigned-int etc, depending on what is the C type of the argument
<mivanchev>
yes
<mivanchev>
this could be it
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