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From: Jeff King <>
To: "Ævar Arnfjörð Bjarmason" <>
Cc:, Junio C Hamano <>
Subject: Re: [PATCH 4/5] streaming.c: stop passing around "object_info *" to open()
Date: Wed, 5 May 2021 09:49:52 -0400	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Wed, May 05, 2021 at 02:33:31PM +0200, Ævar Arnfjörð Bjarmason wrote:

> Change the streaming interface to stop passing around the "struct
> object_info" the open() functions.
> As seen in 7ef2d9a2604 (streaming: read non-delta incrementally from a
> pack, 2011-05-13) which introduced the "st->u.in_pack" assignments
> being changed here only the open_istream_pack_non_delta() path need
> these.
> So let's instead do this when preparing the selected callback in the
> istream_source() function. This might also allow the compiler to
> reduce the lifetime of the "oi" variable, as we've moved it from
> "git_istream()" to "istream_source()".

OK. This blurs the lines a bit between what the generic istream_source()
is responsible for, versus the type-specific helpers. I think that works
a bit against the original design, which was trying to be very abstract
and polymorphic. But that doesn't seem to have bought us much. Just
considering the whole set of streaming code as a module with helper
functions is a bit simpler and more usual for our codebase.

So I'm OK with it unless Junio (as the original author) has strong


  reply	other threads:[~2021-05-05 13:49 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-05 12:33 [PATCH 0/5] streaming.c: refactor for smaller + easier to understand code Ævar Arnfjörð Bjarmason
2021-05-05 12:33 ` [PATCH 1/5] streaming.c: avoid forward declarations Ævar Arnfjörð Bjarmason
2021-05-05 12:33 ` [PATCH 2/5] streaming.c: remove enum/function/vtbl indirection Ævar Arnfjörð Bjarmason
2021-05-05 13:42   ` Jeff King
2021-05-06  0:14     ` Junio C Hamano
2021-05-05 12:33 ` [PATCH 3/5] streaming.c: remove {open,close,read}_method_decl() macros Ævar Arnfjörð Bjarmason
2021-05-05 13:44   ` Jeff King
2021-05-05 12:33 ` [PATCH 4/5] streaming.c: stop passing around "object_info *" to open() Ævar Arnfjörð Bjarmason
2021-05-05 13:49   ` Jeff King [this message]
2021-05-05 12:33 ` [PATCH 5/5] streaming.c: move {open,close,read} from vtable to "struct git_istream" Ævar Arnfjörð Bjarmason
2021-05-05 13:55   ` Jeff King
2021-05-05 13:57 ` [PATCH 0/5] streaming.c: refactor for smaller + easier to understand code Jeff King

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