From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 110916 invoked by alias); 28 Feb 2020 11:41:34 -0000 Mailing-List: contact cygwin-developers-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-developers-owner@cygwin.com Mail-Followup-To: cygwin-developers@cygwin.com Received: (qmail 110906 invoked by uid 89); 28 Feb 2020 11:41:34 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-106.5 required=5.0 tests=AWL,BAYES_00,GOOD_FROM_CORINNA_CYGWIN,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 spammy=H*Ad:U*cygwin-developers X-HELO: mout.kundenserver.de Received: from mout.kundenserver.de (HELO mout.kundenserver.de) (212.227.126.133) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Fri, 28 Feb 2020 11:41:33 +0000 Received: from calimero.vinschen.de ([24.134.7.25]) by mrelayeu.kundenserver.de (mreue010 [212.227.15.167]) with ESMTPSA (Nemesis) id 1Mv3Ds-1jP2Ne0AZU-00qyrQ for ; Fri, 28 Feb 2020 12:41:30 +0100 Received: by calimero.vinschen.de (Postfix, from userid 500) id 7AA1DA8276B; Fri, 28 Feb 2020 12:41:29 +0100 (CET) Date: Fri, 28 Feb 2020 11:41:00 -0000 From: Corinna Vinschen To: cygwin-developers@cygwin.com Subject: Re: Shared memory Message-ID: <20200228114129.GE4045@calimero.vinschen.de> Reply-To: cygwin-developers@cygwin.com Mail-Followup-To: cygwin-developers@cygwin.com References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="FRaepaAnLTQkJ4tS" Content-Disposition: inline In-Reply-To: X-SW-Source: 2020-02/txt/msg00002.txt.bz2 --FRaepaAnLTQkJ4tS Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Content-length: 769 On Feb 27 15:35, Ken Brown wrote: > Hi Corinna, >=20 > I think I see how to enable FIFOs to be opened for reading multiple times, > by using shared memory to maintain data needed by all readers. >=20 > To this end I'm trying to imitate some of what you did in > fhandler_socket_unix.cc, and I find I'm confused about the use of > reopen_shmem. When this is called by fhandler_socket_unix::dup, shouldn't > the call actually be >=20 > fhs->reopen_shmem () ? >=20 > It's the new fhandler that needs to open the shared memory, isn't it? Or= am > I misunderstanding something? You're right. And then it's also called too early. It should only be called after fhs->shmem_handle is valid. I applied a patch. Thanks, Corinna --=20 Corinna Vinschen Cygwin Maintainer --FRaepaAnLTQkJ4tS Content-Type: application/pgp-signature; name="signature.asc" Content-length: 833 -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEoVYPmneWZnwT6kwF9TYGna5ET6AFAl5Y/GkACgkQ9TYGna5E T6ASQg/8DpA3/GB1BxuUSy2f9OEYaPplIJw+V1NQmpHldEsVpFKNG49HoxK32FUx 7qQ3mZkImP6PsH0KHbF+V7l6Mt3scXoXFEL0dwAURLVz/dOHEc8jjDdE9LZRNCCh muvzBZ2FY/LTkpxUhgQT3dUXIu9hJQV+irvTR9wIU0TaVo7fGXcxQLvt/SKwitpc v3MA9PsNnnPav05dR28QedmBtznSu447WnnZD444qezgcrdIFNT7A9v9j7ZpioQh yC+GiC3W7YpCDn1rz1UGoGm+cqRaVDRjHqTXdCTIE8uSabfn4UEgzPNBebXovQzR 2dkbyyBuJi6BLPwMeVjdnwzZhslN7e/5h1qMwbXDQNpwVZTCvNEgWMCnQGGCE4Uq buWp6T7RtOPTCc+/hYPc94QKroyX+fSLcK9kFva3so9Xrl2SVPbFhm/fSy8fSvWT xt+8jam+RX1JpW6ZocJTbTw/30JY0wPEsOwhnUUk08XcNNo5ohM/RWnhxEQdonup DQ2k4Gsi8W93DakvM6AaUOqGF/XU/dwt0XQkJMf1afmYP2LDBtoNnM1uvEgT4K6U yl0usk+nZdrBxUoh5169w+Rsx5j/XOJqDnEZ8vGTC63PzVDRLodEWsph75A7b6eD yHZ7JUW7Hcn0/3Oh7zqMHqgS4EbAANA21NDLK6OLMgBiieKp+EA= =huDd -----END PGP SIGNATURE----- --FRaepaAnLTQkJ4tS--