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bug#27782: new patch for mma

From: Matt Wette
Subject: bug#27782: new patch for mma
Date: Sat, 4 Jul 2020 12:40:19 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0

Attached is a patch against guile master (at 3.0.4),
commit 5e1748f75128107e3a0707b66df5adb95d98437e

It is a incomplete, but functional, implementation of a mmap-api, including
1) mmap : low-level mmap, returns a bytevector, not searched for roots
2) mmap/search : like mmap, but not marked w/ GC_exclude_static_roots
3) mmap-file: high-level, easy-to-use mmap (e.g., (mmap-file "foo.dat"))

The above are coded in libguile/filesys.[ch].

Also included is test-suite/tests/mmap-api.test.

$ ./configure --enable-mmap-api
$ make
$ make check
Running mmap-api.test

Since implementation of mmap may be not simple, I propose a
git branch (e.g., wip-mmap-api) be created to invite group review,
update, test the update.


Attachment: mmap-api-branch.patch
Description: Text Data

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