[curl-loader-devel] Memory pool - objects alignment proposal

[Robert I. <cor...@gm...>]

On 4/19/07, Michael Moser <mos...@gm...> wrote:
> don't know about AMD_64 and pointer alignment, however; do you
> remember? what is Intel_64 doing??

Intel recommends to align a pointer on 64-bit at 8 byte boundary.
Please, look here:

www.intel.com/cd/ids/developer/asmo-na/eng/328769.htm

> On 4/19/07, Michael Moser <mos...@gm...> wrote:
> > mpool implementation does not align the pooled object size - therefore
> > the pointer returned by the beast will not be four byte aligned (on
> > Intel this is not good - will create misalignment interrupts when
> > using the data).
> >
> > fix:
> >
> > #define PTR_ALIGN 4
> >
> > int mpool_init (mpool* mpool, size_t object_size, int num_obj)
> >  {
> >         object_size = (object_size + PTR_ALIGN) & ( ~ (PTR_ALIGN - 1) );
> >         ....
> >

if we have x86_64 or amd64 - check which flags exactly - 8 bytes, else -4 bytes.

But I do not have a 64 bit linux now, therefore the question is how to test.
Do you have something 64 bit with linux?

-- 
Sincerely,
Robert Iakobashvili,
coroberti %x40 gmail %x2e com
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