Memory allocation flags for AHI buffers.

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Anonymous

I want to allocate memory buffers for AHI dynamic sample. AHI doc says I should use MEMF_PUBLIC to be sure that the memory is never swapped out to a disk (as it may be accessed by AHI from within an interrupt). On the other hand OS4 developer guide states MEMF_PUBLIC is obsolete. Which flags should I use?

I also want to have these buffers AltiVec aligned. Does AmigaOS 4 align to 16 bytes by default, or should I use some special allocation function (like MorphOS AllocVecAligned())?

ZeroG

Re: Memory allocation flags for AHI buffers.

Posted on: 2008/10/2 16:52 #2

Not too shy to talk

@krashan

The os4_migration_guide.pdf says:
Quote:

...
The only place where MEMF_PUBLIC should be used if when your memory needs to be accessible by an interrupt.
...

Capehill

Re: Memory allocation flags for AHI buffers.

Posted on: 2008/10/2 20:50 #3

Just can't stay away

@krashan

With AllocVecTags() there is AVT_Alignment parameter which defaults to 16 bytes.

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