X-Recipient: archive-cygwin AT delorie DOT com X-SWARE-Spam-Status: No, hits=-2.0 required=5.0 tests=AWL,BAYES_00,RP_MATCHES_RCVD,SPF_HELO_PASS X-Spam-Check-By: sourceware.org Message-ID: <4F038562.5080606@dancol.org> Date: Tue, 03 Jan 2012 14:46:58 -0800 From: Daniel Colascione User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20111105 Thunderbird/8.0 MIME-Version: 1.0 To: cygwin AT cygwin DOT com Subject: Re: Efficient posix_spawn implementation for Cygwin References: <2b113761fca8acd2a86179e108c83c6a DOT squirrel AT dancol DOT org> <4F038492 DOT 60106 AT cs DOT utoronto DOT ca> In-Reply-To: <4F038492.60106@cs.utoronto.ca> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-IsSubscribed: yes Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: 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 1/3/2012 2:43 PM, Ryan Johnson wrote: > On 03/01/2012 5:25 PM, dancol AT dancol DOT org wrote: >> posix_spawn [1] is an optional POSIX facility that allows programs to >> start other programs without using fork or vfork. I've created an >> efficient implementation of posix_spawn for Cygwin. The code is available >> at https://github.com/dcolascione/cygspawn. >> >> This library uses Cygwin's nonstandard spawn* family calls in >> process.h to >> provide the full suite of posix_spawn* functionality. Implementing >> posix_spawn in terms of spawn turns out to be non-trivial. Nevertheless, >> using posix_spawn can improve process startup performance considerably, >> especially for large programs: > This probably belongs at cygwin-dev, but it sounds interesting > (especially if it allows less-frequent invocation of the rebaseall ritual). This code is a user library. It doesn't require anything not already in cygwin1.dll. While it'd be _better_ to integrate this functionality into the core, of course, doing so isn't required to make the feature work: that's why I posted to this list. > However, you should check out the copyright assignment requirements [2] > if you want the code to make it upstream. Of course I'll assign copyright if the code makes it upstream in some form. Thanks, Daniel Colascione -- 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