From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Yuan Fu Newsgroups: gmane.emacs.devel Subject: Re: Catch arbitrary signal and throw it later in C Date: Thu, 13 Apr 2023 01:12:37 -0700 Message-ID: <7EA1F972-ADC7-4362-9E75-60C481FA8B2D@gmail.com> References: Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3731.500.231\)) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="20939"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org To: Ruijie Yu Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Thu Apr 13 10:13:39 2023 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1pms5L-0005Hv-F1 for ged-emacs-devel@m.gmane-mx.org; Thu, 13 Apr 2023 10:13:39 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pms4e-000513-P7; Thu, 13 Apr 2023 04:12:56 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pms4c-00050i-OP for emacs-devel@gnu.org; Thu, 13 Apr 2023 04:12:54 -0400 Original-Received: from mail-pj1-x102a.google.com ([2607:f8b0:4864:20::102a]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1pms4Z-00068n-8h for emacs-devel@gnu.org; Thu, 13 Apr 2023 04:12:54 -0400 Original-Received: by mail-pj1-x102a.google.com with SMTP id y11-20020a17090a600b00b0024693e96b58so13304599pji.1 for ; Thu, 13 Apr 2023 01:12:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1681373569; x=1683965569; h=to:references:message-id:content-transfer-encoding:cc:date :in-reply-to:from:subject:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=e9acfB/5WVgqSY87V+V5VPqEHI/nxEbjEOa923Dii3I=; b=Vlw/O/J0mDEEaQA0fbdKhpFBfMxJs5+Z02bq90tydGzcvUYjUovNApr/Z7Ar5y/Ken vjEj3g6Tg+oOcPTPMs3hoRYkaRMsxUsIN6TsXgCgQ+imlj/OChbQovitR84nqYKzc4wG O2Q34KgyYNSS5IBrgATz5/+KGcPZ+F1LXu8HA+zxPrSD36mPoMaBnE5g3bnnZrffnZez mR6yqCMMvjDcER8sB/1LGv05pe2SSW8WGJNuGUNc8cIYV7BnkRBPhXOSVyi1TTZy+FCW eYgYIOiOIl/cqpcT9OzW+YmXBaUWdjAHPHBi31X06+KnVnadJ79bw6SSXu+7PlCO8LOR Pu7g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1681373569; x=1683965569; h=to:references:message-id:content-transfer-encoding:cc:date :in-reply-to:from:subject:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=e9acfB/5WVgqSY87V+V5VPqEHI/nxEbjEOa923Dii3I=; b=dmMcpp49V4sPUo1UuIsv+FHtC4mAXwU1VmY/aESrapI330HEu1Fq4NTQWbepPSDvKT CieQo5x9RyWTlwB3Bz/P04TMqspMYFms3VUywcC+mvrHETknlw3wUPXMNZze9Nm6a4Za 4OtVG7iVJJjv17NmFnCYesSkBLByLAtuQDp0dGS6RY2CWbuE5RjWFAVRDjh3gWeiLrhM pahOI26zi9v70UMwpn2AWkk0e3dLXRj344oE9DHRRYsaS5Fpz4lRMDEO5D/3IgGpj9Uk wGQ4y4U4PuzwaRJtsXWuBhGBfJb/1soiCagx1JCC3h+XBWo6em1nYHMjToUZE8RK/Ici V7yA== X-Gm-Message-State: AAQBX9e784F5kYma9nvI4RcPULIRdK3vjv3ycoSjNYaW/FetYO/68Vjq lj9yL54EYA6SSpRnc9pnvJQ= X-Google-Smtp-Source: AKy350ZKjo4Y/xDGINQiIbtfOsXZHCQA6VGAJSYrbzIZ1X+ELuW2olGrbC8RFXiPJbD8e2Wr4pvEnQ== X-Received: by 2002:a17:902:e887:b0:1a6:7ed0:147e with SMTP id w7-20020a170902e88700b001a67ed0147emr1878614plg.33.1681373569174; Thu, 13 Apr 2023 01:12:49 -0700 (PDT) Original-Received: from smtpclient.apple (cpe-172-117-161-177.socal.res.rr.com. [172.117.161.177]) by smtp.gmail.com with ESMTPSA id p11-20020a1709026b8b00b001a6467cfbeasm896294plk.53.2023.04.13.01.12.48 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 13 Apr 2023 01:12:48 -0700 (PDT) In-Reply-To: X-Mailer: Apple Mail (2.3731.500.231) Received-SPF: pass client-ip=2607:f8b0:4864:20::102a; envelope-from=casouri@gmail.com; helo=mail-pj1-x102a.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:305285 Archived-At: > On Apr 13, 2023, at 12:33 AM, Ruijie Yu wrote: >=20 >=20 > Yuan Fu writes: >=20 >> Say I have an arbitrary Lisp function func, and need to evaluate it = in C. But >> after evaluating the function, I need to do some clean up (freeing >> something). Would be be possible to catch any signal thrown by = evaluating the >> function func, and throw it after cleaning up? >=20 > Isn't `unwind-protect' (or its internal C functionalities) what you > want, or is it not suitable in Emacs-C land? This macro is defined in > C, FTR. unwind-protect (and its internal C counterpart) pushes the cleanup form = onto specpdl. Supposingly that form is later eval=E2=80=99ed? I want to = run some C code which obviously it doesn=E2=80=99t support. I need to = understand how this whole unwinding thing work before I can maybe modify = or write something that does what I want. Hopefully some one can = enlighten me :-) Yuan=