Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm 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 Date: Wed, 20 Mar 2002 11:23:54 -0500 From: Christopher Faylor To: cygwin@cygwin.com Cc: rgibson@MIT.EDU Subject: Re: alarm();pause();alarm();pause(); doesn't pause in pthread Message-ID: <20020320162354.GF2762@redhat.com> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com, rgibson@MIT.EDU References: <5.1.0.14.0.20020320010350.0211c960@po12.mit.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5.1.0.14.0.20020320010350.0211c960@po12.mit.edu> User-Agent: Mutt/1.3.23.1i On Wed, Mar 20, 2002 at 01:03:53AM -0500, Rob Gibson wrote: >DLL version 1.3.10, running on Windows ME. I checked the message boards, >but did not see this. > >Call this code X: { > alarm(2); > pause(); > cout << "A"; > alarm(4); > pause(); > cout << "B"; > alarm(4); > pause(); > cout << "C"; > alarm(4); > pause(); > cout << "D"; >} > > >I have two threads. In the first, my original startup thread, I register a >sig handler for SIGALRM. At this point, if I block the SIGALRM signal, >then run X, nothing happens. Ok. (If I unblock SIGALRM, I get four calls >to my sig handler, spaced the appropriate number of seconds apart. Ok.) > >Now I start a second thread using pthread_create(). In the second thread's >function, if I immediately run code X, nothing happens, because my second >thread has inherited the blocked nature of SIGALRM. Ok. signals do not work with anything but the main thread. Sorry. cgf -- Please do not send me personal email with cygwin questions. Use the resources at http://cygwin.com/ . -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/