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
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