X-Recipient: archive-cygwin@delorie.com X-Spam-Check-By: sourceware.org Date: Mon, 22 Dec 2008 13:41:29 -0500 From: Christopher Faylor To: cygwin@cygwin.com Subject: Re: Named pipes (blocking problem) Message-ID: <20081222184129.GA23447@ednor.casa.cgf.cx> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <005b01c96455$6c6bed60$4001a8c0@mycomputer> <2ca21dcc0812220903k38b8923v892f508b2ec55620@mail.gmail.com> <20081222172855.GB27364@ednor.casa.cgf.cx> <002001c96462$6a46d790$4001a8c0@mycomputer> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <002001c96462$6a46d790$4001a8c0@mycomputer> User-Agent: Mutt/1.5.16 (2007-06-09) Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Note-from-DJ: This may be spam On Mon, Dec 22, 2008 at 06:23:40PM -0000, John Emmas wrote: > ----- Original Message ----- From: "Christopher Faylor" > Sent: 22 December 2008 17:28 > Subject: Re: Named pipes (blocking problem) >> >> If the OP is creating a pipe using CreateNamedPipe and then trying to >> somehow read it using Cygwin's I/O library then I wouldn't be surprised >> to see strange behavior. Otherwise, Cygwin does not impose any strange >> limitations on CreateNamedPipe. >> > Thanks Christopher. This is really at the heart of what I'm trying to find > out. Does Cygwin implement its own versions of CreateNamedPipe() and > ReadFile() or does it simply link to the standard Windows versions? If it > passes the calls over to Windows then I'm baffled about why I'm observing > different behaviour. Cygwin tries to emulate linux/POSIX. CreateNamedPipe is not a linux/POSIX function. Cygwin does not implement Windows functions. So, no, Cygwin does not implement its own versions of CreateNamedPipe or ReadFile. As I suggested, if you want to build a pure Windows program, you shouldn't be using Cygwin. Use MinGW instead - http://mingw.org/ . -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/