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Re: kern/38602: sigtimedwait modifies parameter marked 'restrict'
The following reply was made to PR kern/38602; it has been noted by GNATS.
From: Alan Barrett <apb%cequrux.com@localhost>
Subject: Re: kern/38602: sigtimedwait modifies parameter marked 'restrict'
Date: Wed, 7 May 2008 13:03:11 +0200
On Wed, 07 May 2008, ad%NetBSD.org@localhost wrote:
> The timeout parameter to sigtimedwait() is marked with 'restrict',
> meaning that the system call shouldn't change it.
I don't think that's what "restrict" means.
The formal definition of "restrict" is in section 22.214.171.124 of the C99
standard, and is difficult to understand, but in this context it means
something roughly similar to "the function may assume that this pointer
argument doesn't point to the same memory as any other object that the
function will use, and the caller is responsible for guaranteeing that
this assumption is valid".
--apb (Alan Barrett)
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