From: Linhaifeng <haifeng.lin-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
To: "dev-VfR2kkLFssw@public.gmane.org" <dev-VfR2kkLFssw@public.gmane.org>
Subject: some questions about rte_memcpy
Date: Thu, 22 Jan 2015 11:39:11 +0800 [thread overview]
Message-ID: <54C070DF.1050006@huawei.com> (raw)
#define rte_memcpy(dst, src, n) \
((__builtin_constant_p(n)) ? \
memcpy((dst), (src), (n)) : \
rte_memcpy_func((dst), (src), (n)))
Why call memcpy when n is constant variable?
Can i change them to the follow codes?
#define rte_memcpy(dst, src, n) \
{ \
int num = n; \
rte_memcpy_func((dst), (src), (num))) \
}
--
Regards,
Haifeng
next reply other threads:[~2015-01-22 3:39 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-22 3:39 Linhaifeng [this message]
[not found] ` <54C070DF.1050006-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2015-01-22 4:45 ` some questions about rte_memcpy Matthew Hall
[not found] ` <20150122044531.GA13230-Hv3ogNYU3JfZZajBQzqCxQ@public.gmane.org>
2015-01-22 5:32 ` Linhaifeng
[not found] ` <54C08B54.50700-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2015-01-22 7:35 ` Matthew Hall
[not found] ` <20150122073526.GA14800-Hv3ogNYU3JfZZajBQzqCxQ@public.gmane.org>
2015-01-22 10:23 ` Tetsuya Mukawa
[not found] ` <54C0CFB5.909-AlSX/UN32fvPDbFq/vQRIQ@public.gmane.org>
2015-01-22 11:34 ` Bruce Richardson
2015-01-22 12:53 ` Linhaifeng
[not found] ` <54C0F2B9.7050006-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2015-01-22 15:21 ` Bruce Richardson
2015-01-23 2:58 ` Linhaifeng
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=54C070DF.1050006@huawei.com \
--to=haifeng.lin-hv44wf8li93qt0dzr+alfa@public.gmane.org \
--cc=dev-VfR2kkLFssw@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.