[Caml-list] what magic is this?

[effbiae@ivorykite.com]

i've started writing a mmap module.  i'm looking at the source to bigarray
to see how it's done. in bigarray.ml, external functions
 Array1.{get,set} are linked to "%bigarray_{ref,set}_1"

1) what's the % -- is this what allows the fast access to the base data?
2) bigarray_ref_1 and bigarray_set_1 are not defined anywhere

hold on... greps...finds...

  bytecomp/translcore.ml:   primitives_table ... "%bigarray_ref_1" ...

aahhh.

i bet i could reuse this in my mmap module.  the question is how?

typedef struct _MM{int fd;void *map;unsigned long size;}*MM;

module Mm = struct
 type ('a,'b)t
 external create: 'a a -> 'b b -> ('a, 'b) t
 external get: ('a, 'b) t -> int -> 'a = "%bigarray_ref_1"
 external set: ('a, 'b) t -> int -> 'a -> unit = "%bigarray_set_1"
...end

any pointers greatly appreciated.


jack

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