Re: [Jack-Devel] Alignment (again)

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DateThu, 04 Aug 2011 10:07:13 -0500
From Gabriel Beddingfield <[hidden] at gmail dot com>
ToClemens Ladisch <[hidden] at ladisch dot de>
Cc[hidden] at lists dot jackaudio dot org
In-Reply-ToClemens Ladisch Re: [Jack-Devel] Alignment (again) 
On Thu, Aug 4, 2011 at 1:18 AM, Clemens Ladisch <[hidden]> wrote:
> Gabriel Beddingfield wrote:
>> I ran into a strange bug where the conclusion was that:
>>
>>     float *buf = malloc(512*sizeof(float));
>>
>> Is invalid/undefined code.  I don't have a copy of the C spec, but the
>> C++ spec says, that since a `float` must be 4-byte aligned... so must a
>> `float*`.[1]  However, malloc(3) has no alignment requirements.
>
> C99 7.20.3 says:
> | The pointer returned ... is suitably aligned so that it may be
> | assigned to a pointer to any type of object and then used to access
> | such an object or an array of such objects in the space allocated ...
>
> Anything else would not make sense.

Thanks, Clemons.

This entire thread is invalid.  I'm sorry for the noise.  Thanks to
all (including Nedko) who set me straight.  I take back everything
I've said.

-gabriel
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