Alignment of shmat()'s returned value

#1 (**permalink**) 03-04-2008, 07:19 AM

man shmat(): HP-UX 11i Version 2: August 2003

> uname -smrsv
HP-UX B.11.23 U ia64

void* ptr = shmat (shmid, 0, shmflg);
assert (ptr != SHM_FAILED);

Can it be guaranteed that ptr has a priory known alignment?
For instanse, two hexadecimal nulls at the end: 0xnnn...nnn00 ?

Alex Vinokur
email: alex DOT vinokur AT gmail DOT com
http://mathforum.org/library/view/10978.html
http://sourceforge.net/users/alexvn

#2 (**permalink**) 03-04-2008, 07:19 AM

Alex Vinokur wrote:
> Can it be guaranteed that ptr has a priory known alignment?

They should be at least page aligned, typically 0x1000.

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