X-Recipient: archive-cygwin@delorie.com X-Spam-Check-By: sourceware.org From: Tatsuro MATSUOKA To: Danny Smith Cc: matsuoka@nuce.nagoya-u.ac.jp, cygwin@cygwin.com Date: Tue, 11 Sep 2007 07:51:36 +0900 Subject: Re: gcc-dw2? or fast sjlj-exceptions EH Reply-To: matsuoka@nuce.nagoya-u.ac.jp In-Reply-To: <000001c7f3f6$e64897d0$276d65da@THOMAS> References: <000001c7f3f6$e64897d0$276d65da@THOMAS> Message-Id: <20070911075136.7389DD60.matsuoka@mol.nagoya-u.ac.jp> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: nPOP Ver 1.0.9 X-IsSubscribed: yes 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 Thank you Danny. My ability is not high enough so that I will discuss your suggestion in the Octave ML. Tatsuro MATSUOKA Danny Smith wrote: (2007/09/11 07:06) >At http://www.cygwin.com/ml/cygwin/2007-09/msg00194.html > >Tatsuro Matsuoka wrote: > >> The best solution, I think, the speed of sjlj-exceptions EH on the >> cygwin is as fast as that of other platforms. >> > >In the case of octave, I believe that the main cause of slowdown is the >sjlj EH code generated in prologue of new() >Does a no-throw override of libary version of these functions help ? > > >Danny >#ifdef __USING_SJLJ_EXCEPTIONS__ >#define NEW_THROW_SPEC throw() >#else >#define NEW_THROW_SPEC throw(std::bad_alloc) >#endif > >#include ... > >void * >operator new (std::size_t sz) NEW_THROW_SPEC >{ > void *p; > > /* malloc (0) is unpredictable; avoid it. */ > if (sz == 0) > sz = 1; > p = (void *) malloc (sz); > while (p == 0) > { > new_handler handler = __new_handler; > if (! handler) >#ifdef __USING_SJLJ_EXCEPTIONS__ > std::abort(); >#else > throw bad_alloc(); >#endif > handler (); > p = (void *) malloc (sz); > } > > return p; >} > >void * >operator new[] (std::size_t sz) NEW_THROW_SPEC >{ > return ::operator new(sz); >} > > >-- >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/ -- 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/