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Wish: Bigarray.*.map_file should set an offset #3790

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vicuna opened this Issue Sep 14, 2005 · 2 comments

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commented Sep 14, 2005

Original bug ID: 3790
Reporter: administrator
Assigned to: @xavierleroy
Status: closed (set by @xavierleroy on 2007-02-21T15:19:15Z)
Resolution: fixed
Priority: normal
Severity: feature
Version: 3.10+dev
Category: ~DO NOT USE (was: OCaml general)
Parent of: #3791 #4024

Bug description

Full_Name: Christoph Bauer
Version: 3.08.3
OS:
Submission from: 213.68.136.226 (213.68.136.226)

Hi,

a possibility to set the offset in a bigarray-mmap file
would be very useful. Either bigarray_map_file should
get 6 parameters or the currpos value from the file
descriptor could be used. The main drawback for my
wish is, that it may breaks existing ocaml programs.

Furthermore a wrapper for getpagesize() is needed
to calculate a valid offset.

Thanks,
Christoph Bauer

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commented Jun 10, 2006

Comment author: @xavierleroy

See #4024

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commented Feb 21, 2007

Comment author: @xavierleroy

Feature implemented in 3.10 as an optional argument to the map_file functions. The argument gives the file offset for the beginning of the file data.
Arbitrary offsets (not necessarily page-aligned) are supported.

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