sem at FreeBSD.org
Thu Aug 18 08:07:55 GMT 2005
Chuck Swiger wrote:
>> What does "suitable aligned for storage of *any* type of object" means?
> On some platforms, it is either desirable or required that, say, a
> 8-byte double is stored at a memory location which is is also aligned to
Oh, it was told for different architectures. It's quite clear for me now.
>> What is pointer coercion? I have no pointer before malloc() returns.
> Right. Well, malloc returns a (void *), but most people want to use the
> memory malloc returns to hold their own arrays, structs, whatever, which
> means that you need to be able to coerce the (void *) malloc gave you
> into whatever pointer type you want to actually use.
> So the memory malloc gives you needs to be aligned so that it's OK to be
> used for even the most restrictive datatype known to the system,
> commonly 8, 16, or 32 bytes.
Pointer coercion means a type cast? I see now.
I read it as 'force change of pointer value' before.
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