From: Junio C Hamano <gitster@pobox.com>
To: chengang31@gmail.com
Cc: git@vger.kernel.org
Subject: Re: ce_stage(..) == 2?
Date: Sun, 14 Feb 2010 22:53:34 -0800 [thread overview]
Message-ID: <7vbpfrhtw1.fsf@alter.siamese.dyndns.org> (raw)
In-Reply-To: <4B78EE4B.2040707@gmail.com> (cg's message of "Mon\, 15 Feb 2010 14\:48\:43 +0800")
cg <chengang31@gmail.com> writes:
> I saw some code like:
> attr.c(365): if (ce_stage(istate->cache[i]) == 2)
> ...
> rerere.c(352): if (ce_stage(e2) == 2
> ...
>
> but there is no 0x200 in cache.h(158):
> #define CE_NAMEMASK (0x0fff)
> #define CE_STAGEMASK (0x3000)
> #define CE_EXTENDED (0x4000)
> #define CE_VALID (0x8000)
> #define CE_STAGESHIFT 12
>
> so what does "2" mean?
#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT)
0x3000 shifted 12 places is a mask for two bits, as you can have cache
entries at stage 0 (normal), or stage 1/2/3.
prev parent reply other threads:[~2010-02-15 6:53 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-15 6:48 ce_stage(..) == 2? cg
2010-02-15 6:53 ` Junio C Hamano [this message]
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