From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Tom Tromey Newsgroups: gmane.emacs.devel Subject: Re: Concurrency Date: Sun, 28 Mar 2010 13:40:59 -0600 Message-ID: References: <27349166.post@talk.nabble.com> <27560255.post@talk.nabble.com> <4B754E74.8060705@swipnet.se> <27563610.post@talk.nabble.com> <4B7564C7.1010309@swipnet.se> <27564728.post@talk.nabble.com> <4B756FB7.3050202@swipnet.se> <87k4ui4gik.fsf@lola.goethe.zz> <27566385.post@talk.nabble.com> <87wryi2sjd.fsf@lola.goethe.zz> <27585994.post@talk.nabble.com> <87k4ucdmwh.fsf@stupidchicken.com> <87d3zweq4e.fsf@master.homenet> <87y6hg1h4a.fsf@thor.thematica.it> <87tys3j9fa.fsf@lifelogs.com> <87eij6tqmu.fsf@lifelogs.com> Reply-To: Tom Tromey NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: dough.gmane.org 1269805281 27931 80.91.229.12 (28 Mar 2010 19:41:21 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Sun, 28 Mar 2010 19:41:21 +0000 (UTC) Cc: emacs-devel@gnu.org To: Ted Zlatanov Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Mar 28 21:41:16 2010 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1NvyMG-0008Nv-3c for ged-emacs-devel@m.gmane.org; Sun, 28 Mar 2010 21:41:16 +0200 Original-Received: from localhost ([127.0.0.1]:38508 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NvyMF-0001oJ-EP for ged-emacs-devel@m.gmane.org; Sun, 28 Mar 2010 15:41:15 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NvyMB-0001np-E4 for emacs-devel@gnu.org; Sun, 28 Mar 2010 15:41:11 -0400 Original-Received: from [140.186.70.92] (port=59263 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NvyMA-0001nW-3p for emacs-devel@gnu.org; Sun, 28 Mar 2010 15:41:11 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1NvyM7-00033A-Sy for emacs-devel@gnu.org; Sun, 28 Mar 2010 15:41:09 -0400 Original-Received: from mx1.redhat.com ([209.132.183.28]:44274) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1NvyM7-00032S-Lr for emacs-devel@gnu.org; Sun, 28 Mar 2010 15:41:07 -0400 Original-Received: from int-mx03.intmail.prod.int.phx2.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.16]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o2SJf3tv030790 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Sun, 28 Mar 2010 15:41:03 -0400 Original-Received: from ns3.rdu.redhat.com (ns3.rdu.redhat.com [10.11.255.199]) by int-mx03.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id o2SJf2Xb011371; Sun, 28 Mar 2010 15:41:02 -0400 Original-Received: from opsy.redhat.com (ovpn01.gateway.prod.ext.phx2.redhat.com [10.5.9.1]) by ns3.rdu.redhat.com (8.13.8/8.13.8) with ESMTP id o2SJexU1005808; Sun, 28 Mar 2010 15:40:59 -0400 Original-Received: by opsy.redhat.com (Postfix, from userid 500) id 1F3A9378212; Sun, 28 Mar 2010 13:40:59 -0600 (MDT) X-Attribution: Tom In-Reply-To: <87eij6tqmu.fsf@lifelogs.com> (Ted Zlatanov's message of "Fri, 26 Mar 2010 22:00:57 -0500") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) X-Scanned-By: MIMEDefang 2.67 on 10.5.11.16 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:122808 Archived-At: Tom> Nope. However, there aren't really many new Emacs primitives. Here's a quick rundown of the new primitives. (run-in-thread FUNC) Take a no-argument function as an argument. Makes a new thread and calls the function. (with-new-thread FORM) A convenience macro that takes a form, wraps it in a lambda, and calls run-in-thread. (yield) Yield control. Emacs has semi-cooperative threading. Thread switches happen during I/O or by explicit yield. (make-mutex) Make a new lock and return it (mutex-lock MUTEX) Acquire a mutex. If already held by this thread, returns. If the mutex is held by some other thread, blocks until it is available. (mutex-unlock MUTEX) Release the lock. There is also a new variable, minibuffer-mutex. I think it is pretty self-explanatory, but Giuseppe should probably explain it. I don't have time to write demos or even proper documentation, I'm afraid. Giuseppe also has a patch of some kind to Gnus, but I didn't see it in the tree, and I don't know exactly what it does. Tom