[PATCH] __fsetlocking

[Yaakov Selkowitz]

On 2014-12-15 09:11, Corinna Vinschen wrote:
> On Dec 11 12:08, Yaakov Selkowitz wrote:
>> Another of the stdio_ext functions from Solaris and glibc:
>>
>> https://docs.oracle.com/cd/E19683-01/816-0213/6m6ne37vm/index.html
>> http://man7.org/linux/man-pages/man3/stdio_ext.3.html
>>
>> Patch attached.
>
> Thanks.  This patch introduces a problem for single thread targets.
> While _newlib_flockfile_start and friends where no-ops before (given
> that _flockfile/_funlockfile are no-ops), they now introduce a redundant
> check for a bit in fp->_flags2.  This check *may* be removed by compiler
> optimization, but we shouldn't rely on that.  What this patch needs is a
> new no-op-like definition of _newlib_flockfile_start and friends for
> single thread targets.

Revised patch attached.

-- 
Yaakov Selkowitz
Associate Software Engineer, ARM
Red Hat, Inc.
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