0004987: caml/bigarray.h should export more

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0004987

OCaml

OCaml otherlibs

public

2010-02-26 21:47

2012-06-21 20:16

Reporter

goswin

Assigned To

Priority

normal

Severity

feature

Reproducibility

always

Status

acknowledged

Resolution

open

Platform

OS Version

Product Version

3.11.2

Target Version

Fixed in Version

Summary

0004987: caml/bigarray.h should export more

Description

For libfuse-ocaml bindings I need to pass a buffer to a callback to ocaml. The complication is that, since the buffer is part of a larger request, it is in the middle of an allocated chunk of memory. Luckily ocaml can already handle this case nicely in the form of Bigarrays. In ocaml using "Bigarray.Array1.sub full_request offset length" I can create a subset of the full array without having to copy the data.

But this can not be used in C stubs as caml/bigarray.h does not export the API for proxy objects or the function to create sub arrays. For my use case it would be enough to add

CAMLprim value caml_ba_sub(value vb, value vofs, value vlen);

to caml/bigarray.h. But for completness the proxy struct should probably be exported as well as a helper function to savely free a bigarray (in case of Bigarrays not under GC control).

MfG
Goswin

Issue History
Date Modified	Username	Field	Change
2010-02-26 21:47	goswin	New Issue
2011-06-01 14:32	doligez	Status	new => acknowledged
2012-06-21 20:16	frisch	Category	OCaml general => OCaml otherlibs

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