X-Recipient: archive-cygwin AT delorie DOT com X-SWARE-Spam-Status: No, hits=-1.8 required=5.0 tests=AWL,BAYES_00,SARE_MSGID_LONG40,SPF_PASS X-Spam-Check-By: sourceware.org MIME-Version: 1.0 In-Reply-To: <20091121173625.GB9003@ednor.casa.cgf.cx> References: <4B061709 DOT 2040507 AT cygwin DOT com> <20091120112052 DOT GT29173 AT calimero DOT vinschen DOT de> <20091120143237 DOT GD18289 AT ednor DOT casa DOT cgf DOT cx> <20091120144958 DOT GW29173 AT calimero DOT vinschen DOT de> <20091120184906 DOT GA27241 AT ednor DOT casa DOT cgf DOT cx> <20091121121218 DOT GZ29173 AT calimero DOT vinschen DOT de> <20091121173625 DOT GB9003 AT ednor DOT casa DOT cgf DOT cx> Date: Sat, 21 Nov 2009 13:04:32 -0500 Message-ID: Subject: Re: Use of Dual Core causes random failures building OpenJDK From: mike marchywka To: cygwin AT cygwin DOT com Content-Type: text/plain; charset=ISO-8859-1 X-IsSubscribed: yes Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com On 11/21/09, Christopher Faylor wrote: > On Sat, Nov 21, 2009 at 08:16:29AM -0500, mike marchywka wrote: >>On 11/21/09, Corinna Vinschen wrote: >>>No, never. If there is a concurrency problem with the envionment, it's >>>between threads of the same process. In that case, we can make getenv, >>>setenv and friends thread-safe, but it's still actually a problem of >>>the application, given that getenv, setenv and friends are not >>>thread-safe per POSIX. See >>>http://www.opengroup.org/onlinepubs/9699919799/functions/setenv.html >>>http://www.opengroup.org/onlinepubs/9699919799/functions/getenv.html >>>http://www.opengroup.org/onlinepubs/9699919799/functions/unsetenv.html >>> >> >>well, the question was somewhat rhetorical/disingenuous but I don't see >>how in the general case then the OS can allow two simultaneous >>processes to modify windoze env variables in a way that corrupts them. >>The app is responsible for itself but I'm not sure what it can do with >>respect to other processes. If you wanted an emulation layer to be >>safe you are still limited by the OS( but you may have already known >>that LOL). > > I am beginning to think that this is a troll. Corinna talks about > threads and you talk about processes. Either you're clueless about the > distinction or you are just "having fun". No, read my posts. I contributed an observation that suggests the windoze variables don't handle concurrent updates well. Two threads needn't come from same process. Corinna stated as fact that the MSFT variable updates are supposed to be safe, creating some confusion about the accureacy or usefulness of my observation. Perhaps my memory is not right or there is some other issue with running multiple installs at once. In any case, the OP's issue should have been better resolved as it was determined cygwin isn't required to make this stuff thread safe. > > There are simple things that can be done to make Cygwin's handling of > environment variables thread safe. Stop arguing about it. You're just > looking stupid now. Well, again, if the OS has some underlying issue there may be nothing you can do with processes that don't call through cygwin dll. Alternatively, there may be reasons you don't want some things thread safe etc. So, I'm not sure what platitude is at issue here. The thing Corinna sited said they don't need the setenv needn't be thread safe, what are the issues etc etc. Plenty you could argue about, I just wasn't sure if the OS would let you make a bullet proof solution. > > cgf > > -- > Problem reports: http://cygwin.com/problems.html > FAQ: http://cygwin.com/faq/ > Documentation: http://cygwin.com/docs.html > Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple > > -- marchywka AT gmail DOT com Mike Marchywka 586 Saint James Walk Marietta GA 30067-7165 415-264-8477 (w)<- use this 404-788-1216 (C)<- leave message 989-348-4796 (P)<- emergency only marchywka AT hotmail DOT com Note: If I am asking for free stuff, I normally use for hobby/non-profit information but may use in investment forums, public and private. Please indicate any concerns if applicable. Note: hotmail is censoring incoming mail using random criteria beyond my control and often hangs my browser but all my subscriptions are here..., try also marchywka AT yahoo DOT com -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple