GNU bug report logs - #18592
FFI should have portable access to ‘errno’

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From: Nala Ginrut <nalaginrut <at> gmail.com>
To: Mark H Weaver <mhw <at> netris.org>
Cc: 18592 <at> debbugs.gnu.org, Ludovic Courtès <ludo <at> gnu.org>, Chaos Eternal <chaoseternal <at> shlug.org>
Subject: bug#18592: FFI should have portable access to ‘errno’
Date: Tue, 05 Jan 2016 03:14:32 +0800

[Message part 1 (text/plain, inline)]

Hi Mark!
Thanks for all the advices.

Here's the new patch according to your advices.
Include:
1. Added new procedure pointer->procedure-with-errno with
#:return-errno?

Question: Should we make #:return-errno? true in default? This would
make the name *-with-errno more reasonable. At present, it's false in
default.

2. Used scm_cons2

3. Store errno to a local var after ffi_call immediately.

4. Set errno=0 only when #:return-errno? is true.

5. Merged all modifications into one patch.

Comments please.

Best regards.

[0001-Added-new-function-pointer-procedure-with-errno-to-r.patch (text/x-patch, attachment)]

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