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From: Matheus Tavares Bernardino <matheus.bernardino@usp.br>
To: git <git@vger.kernel.org>
Cc: Johannes Sixt <j6t@kdbg.org>, Jeff King <peff@peff.net>,
	Jonathan Tan <jonathantanmy@google.com>
Subject: Re: [RFC] Thread safety in some low-level functions
Date: Wed, 24 Jun 2020 19:52:58 -0300	[thread overview]
Message-ID: <CAHd-oW5jCWeWDcMhLU2Zf96uTtxLehVsM+StDC8LZga282cDjw@mail.gmail.com> (raw)
In-Reply-To: <CAHd-oW5zh=BG29O0Z-M7R26Lgd=RHECMV2+qByF+vU6PmrEn_Q@mail.gmail.com>

On Wed, Jun 24, 2020 at 7:29 PM Matheus Tavares Bernardino
<matheus.bernardino@usp.br> wrote:
>
> - Regarding, oid_to_hex(), a patch from 2010 [1] proposed a solution
> using thread-local storage and pthread_once(). But as Hannes pointed
> out in this other thread [2] , implementing a Windows equivalence for
> pthread_once() could be tricky and voluminous. Since this thread dates
> from 7 years ago, I was wondering if we would be able to implement it
> nowadays with InitOnceExecuteOnce() [3].

I forgot to link it before, but here is a commit in libav.git which
emulates pthread_once():
https://git.libav.org/?p=libav.git;a=commitdiff;h=b22693b06d1e5d73454a65c203b4d31c1ca5b69a

The patch is not so big, and if we consider only Vista+, it seems very
straightforward. I'm not very familiar with Windows, though, and I'm
not sure if this solution would work for us.

  reply	other threads:[~2020-06-24 22:53 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-24 22:29 Matheus Tavares Bernardino
2020-06-24 22:52 ` Matheus Tavares Bernardino [this message]
2020-06-25  1:38   ` brian m. carlson
2020-06-25 20:32     ` [PATCH 0/2] Make oid_to_hex() thread-safe Matheus Tavares
2020-06-25 20:32       ` [PATCH 1/2] compat/win32/pthread: add pthread_once() Matheus Tavares
2020-06-26  5:45         ` Christian Couder
2020-06-26 14:13           ` Matheus Tavares Bernardino
2020-06-25 20:32       ` [PATCH 2/2] hex: make hash_to_hex_algop() and friends thread-safe Matheus Tavares
2020-06-25 23:07         ` brian m. carlson
2020-06-25 23:54           ` Matheus Tavares Bernardino
2020-06-26  0:00             ` Matheus Tavares Bernardino
2020-06-26  6:02         ` Christian Couder
2020-06-26  8:22       ` [PATCH 0/2] Make oid_to_hex() thread-safe Christian Couder
2020-06-26 16:22         ` Matheus Tavares Bernardino
2020-06-26 21:54       ` [PATCH v2 " Matheus Tavares
2020-06-26 21:54         ` [PATCH v2 1/2] compat/win32/pthread: add pthread_once() Matheus Tavares
2020-06-26 21:54         ` [PATCH v2 2/2] hex: make hash_to_hex_algop() and friends thread-safe Matheus Tavares
2020-06-29 15:11           ` Johannes Schindelin
2020-06-30 20:37             ` Matheus Tavares Bernardino
2020-07-01 11:32               ` Johannes Schindelin
2020-07-16 11:29           ` Johannes Schindelin
2020-07-18  3:09             ` Matheus Tavares Bernardino
2020-08-10 14:15               ` Johannes Schindelin
2020-07-18  3:52             ` Matheus Tavares
2020-07-26 17:41               ` René Scharfe

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