Graphics in XP

I'm using OcamlWin.exe

How do I use the Graphics modules?

Here's my error message:

# Graphics.open_graph "";;
Reference to undefined global `Graphics'

Thanks,
 Randy Latimer rdlatimer <at> tjhsst.edu

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Garbage Collecting

Hi,

We're trying to figure out why memory doesn't get collected in our OS
by the OCaml GC, and seems like it doesn't want to reclaim any memory.
We also suspect that Gc.allocated_bytes has a memory leak.

Here is our test case:
(* File mod.ml -- some ``useful'' Caml functions *)
open Printf

let fib (n:int) =1 + n

;;

let mem = ref 0;;
let do_stuff () = 
(* 	making this loop more increases mem usage *)
	for i=1 to 900000 do
		fib i;
		int_of_float (Gc.allocated_bytes()); (* A *)
	done;
	mem := int_of_float (Gc.allocated_bytes())
;;

let do_results() = 
	printf "allocated %d\n" !mem;
	Gc.full_major(); (* B1 *)
	Gc.compact();
	Gc.major();
	Gc.minor(); (*B2 *)

Re: Graphics in XP

On Sat, 1 Jan 2005, rdlatimer <at> tjhsst.edu wrote:
> 
> # Graphics.open_graph "";;
> Reference to undefined global `Graphics'

Type

 #load "graphics.cma";;

first (the prompt '#' is NOT displayed above).  For further "beginner
questions", please use http://groups.yahoo.com/group/ocaml_beginners

Happy new year,
ChriS

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Re: Garbage Collecting

Okay, so we didn't look at the documentation properly.
Gc.allocated_bytes is for lifetime of the program. Now things suddenly
make a whole lot of sense =)

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Re: Wither us -pack lacking users?

Objcopy used to be distributed with macosx's developer tools but they  
were broken. I think they were removed in the latest public  
distribution of the developer tools.

Your problem is a known wish :

<http://caml.inria.fr/bin/caml-bugs/feature%20wish?id=2634;user=guest; 
selectid=2634>

Regards,

Daniel

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Re: Garbage Collecting

 > Jonathan Roewen [Sun, 2 Jan 2005]:
 > 
 > Hi,
 > 
 > We're trying to figure out why memory doesn't get collected in our
 > OS by the OCaml GC, and seems like it doesn't want to reclaim any
 > memory.  We also suspect that Gc.allocated_bytes has a memory leak.
 > 
 > Here is our test case:
 > (* File mod.ml -- some ``useful'' Caml functions *)
 > open Printf
 > 
 > let fib (n:int) =1 + n
 > 
 > ;;
 > 
 > let mem = ref 0;;
 > let do_stuff () = 
 > (* 	making this loop more increases mem usage *)
 > 	for i=1 to 900000 do
 > 		fib i;
 > 		int_of_float (Gc.allocated_bytes()); (* A *)
 > 	done;
 > 	mem := int_of_float (Gc.allocated_bytes())
 > ;;
 > 
 > let do_results() = 
 > 	printf "allocated %d\n" !mem;
 > 	Gc.full_major(); (* B1 *)
 > 	Gc.compact();

Re: Wishes for an easy install of Ocaml

From: Richard Jones <rich <at> furbychan.annexia.org>
> On Mon, Dec 27, 2004 at 05:54:11PM +0100, Sven Luther wrote:
> > What about installing tuareg by default in the ocaml-core or whatever
> > meta-package, and have it ask a debconf question at priority medium about
> > which of the two emacs bindings should be used ? 
> 
> What about ditching the core emacs support and just including tuareg
> mode instead, since (no offence to whoever wrote the core support)
> tuareg's much better.

The core ocaml-mode has been written by so many people, that nobody
will take the blame (I hope so, or you could face a vendetta.)
The problem with it is that the code is such spagetthi that it gets
difficult to improve it (at least the indentation part.)

Having never tried Tuareg (mostly out of inertia, since I'm satisfied
with the core mode), could you be more precise about what is better in
Tuareg. Excluding indentation style of course, as this is a matter of
taste. (But note that in order to replace the core mode, you have to be
able to indent in exactly the same way.)

Just curious.

Ditching the core mode would indeed save time for some people.

Cheers for the new year.

       Jacques Garrigue

_______________________________________________

Re: MacOS port and file formats

From: Mary Fernandez <mff <at> research.att.com>

> Thanks for your message.  Here is what I am trying to do.
> 
> My O'Caml application is an XQuery engine.  It has three
> APIs: one for O'Caml, one for C, and one for Java applications.
> 
> We create a native-code, dynamically linked
> C library that includes our O'Caml library, the O'Caml runtime,
> and several other C libraries that our application depends upon
> the unix, nums, str libraries plus an external PCRE library.
> We actually do this by hand with ocamlopt (not ocamlmklib)
> because in the past, we found ocamlmklib did not work consistently
> on all platforms.

To be more precise, ocamlmklib produces two kinds of output: a DLL for
dynamic loading in bytecode programs, and a static library for custom
and native programs.
What you seem to want is a dynamic library to link with native
programs, which is out of the specification.

On most architectures, the DLL can be used as a dynamic library, but
this is not true on darwin, and only partly true on windows (you also
need a binding library, which is not kept.)

If your concern is darwin, then there is a simple answer: you can just
get the installed static library, and turn it into a dynamic library,
as all C code on darwin is position independent. Just look for the
correct linker incantation in the darwin manual.
It's better not to try to meddle with the core ocaml compilation,

Internships and Post-doctoral Positions at MSR Cambridge

Re: Wishes for an easy install of Ocaml

On Sun, Jan 02, 2005 at 10:21:49AM +0900, Jacques Garrigue wrote:
> The core ocaml-mode has been written by so many people, that nobody
> will take the blame (I hope so, or you could face a vendetta.)
> The problem with it is that the code is such spagetthi that it gets
> difficult to improve it (at least the indentation part.)
> 
> Having never tried Tuareg (mostly out of inertia, since I'm satisfied
> with the core mode), could you be more precise about what is better in
> Tuareg. Excluding indentation style of course, as this is a matter of
> taste. (But note that in order to replace the core mode, you have to be
> able to indent in exactly the same way.)

I don't know about the exact details, but I notice the difference when
I have to use a machine which doesn't have tuareg-mode installed.  So
much so that I just install tuareg before going any further.
Integration with font-lock-mode seems better.

I'm quite sure that tuareg-mode can be configured to indent
the same way as the core mode.

Since tuareg-mode is actually developed at INRIA, it would seem fairly
logical to integrate it into OCaml.

Rich.

--

-- 

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