From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Andrew Tropin Newsgroups: gmane.lisp.guile.devel Subject: [PATCH v2] Add atomic-box-update! function to (ice-9 atomic) Date: Tue, 22 Aug 2023 14:59:13 +0400 Message-ID: <87pm3f8hry.fsf@trop.in> References: <87jzvztzi3.fsf@trop.in> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha512; protocol="application/pgp-signature" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="26935"; mail-complaints-to="usenet@ciao.gmane.io" To: guile-devel@gnu.org Original-X-From: guile-devel-bounces+guile-devel=m.gmane-mx.org@gnu.org Tue Aug 22 12:59:36 2023 Return-path: Envelope-to: guile-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 1qYP6m-0006qh-Fl for guile-devel@m.gmane-mx.org; Tue, 22 Aug 2023 12:59:36 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qYP6a-0004O6-Qi; Tue, 22 Aug 2023 06:59:24 -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 1qYP6Z-0004Nx-Hq for guile-devel@gnu.org; Tue, 22 Aug 2023 06:59:23 -0400 Original-Received: from relay5-d.mail.gandi.net ([217.70.183.197]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qYP6X-0002ZW-CB for guile-devel@gnu.org; Tue, 22 Aug 2023 06:59:23 -0400 Original-Received: by mail.gandi.net (Postfix) with ESMTPSA id 736751C0008 for ; Tue, 22 Aug 2023 10:59:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=trop.in; s=gm1; t=1692701959; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=Kap+Hpo/EQzTp3/4sGJnpchE8wJIByWbs1hi5XTWlLA=; b=Rdhcs0fLJQzFncMSSmCFAdsGNC4Q66x6o54wQ+THkB9BTUGVwzH2PIOZ3DXp8OSoOqZSme msRPv3lclLvYJhGXfROUijJshVIQo4T12gndldYCxa0i6qiG/AqhAV3oiUP6SD5gYe2NXg ZhhsmsjtmIqdQIogUTORwcA9UVjXHILqHvI5I5W/lTQdjceoXDauEGtZHHXBD7sfF+/epU kUD+l27fJDA+OXOcmV115xfg1/SvCt20kql9OFk4oGJmmN3rO+QbdNVgtv/7hLiJ4zQ5+J 8dW7AaW7+kiqawh77Xtts/Cd3M+rDvYDI0ik7MpCLeckEg7g+3AN1YNXRaZlDw== In-Reply-To: <87jzvztzi3.fsf@trop.in> X-GND-Sasl: andrew@trop.in Received-SPF: pass client-ip=217.70.183.197; envelope-from=andrew@trop.in; helo=relay5-d.mail.gandi.net X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: guile-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Developers list for Guile, the GNU extensibility library" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guile-devel-bounces+guile-devel=m.gmane-mx.org@gnu.org Original-Sender: guile-devel-bounces+guile-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.lisp.guile.devel:21921 Archived-At: --=-=-= Content-Type: text/plain Content-Transfer-Encoding: quoted-printable * module/ice-9/atomic.scm (atomic-box-update!): New variable. =2D-- Changes since v1. Use single-argument proc to avoid potential perfomance problems cause of call to apply. module/ice-9/atomic.scm | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/module/ice-9/atomic.scm b/module/ice-9/atomic.scm index 2a8af901d..6bfa2e8ee 100644 =2D-- a/module/ice-9/atomic.scm +++ b/module/ice-9/atomic.scm @@ -25,7 +25,8 @@ atomic-box-ref atomic-box-set! atomic-box-swap! =2D atomic-box-compare-and-swap!)) + atomic-box-compare-and-swap! + atomic-box-update!)) =20 (eval-when (expand load eval) (load-extension (string-append "libguile-" (effective-version)) @@ -36,3 +37,14 @@ (add-interesting-primitive! 'atomic-box-set!) (add-interesting-primitive! 'atomic-box-swap!) (add-interesting-primitive! 'atomic-box-compare-and-swap!)) + +(define (atomic-box-update! box proc) + "Atomically updates value of BOX to (PROC BOX-VALUE), returns new +value. PROC may be called multiple times, and thus PROC should be +free of side effects." + (let loop () + (let* ((old-value (atomic-box-ref box)) + (new-value (proc old-value))) + (if (eq? old-value (atomic-box-compare-and-swap! box old-value new-v= alue)) + new-value + (loop))))) =2D-=20 2.40.1 --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEKEGaxlA4dEDH6S/6IgjSCVjB3rAFAmTklQEACgkQIgjSCVjB 3rAoJg/+IP2JMEPbiCiPUl1bWQMg4RGabut5gTRp/avQpdjpfsNy/u1B16aW1EBo M3K3OEI5U4frgBBprk7+zZmKmcCPOhM9hxmQWxlmZAwgLfugyUgQbf0qVFSpdvs8 zyCT4BgtzFZPjT1yb3SnXZboLcPlD7Lt3qtSJD48lT2ji2/Z1piTVUmt7Xe7hobR G7BK4jgx2+4Ttjg2kvkpRYM/EIcanv8HmladQBjCgdtEErgyFVw0mdBY1s/cbQ9s XdVNJCyCHYTyi/uD4Pp3HkixaoUOBSc95dFI1LqXLpopiCB5155kh1Y2KgTy9tvr +D7szNMxLqwLiIctU88+1tT8SNoz83Ama9DB1fnlnS/lRojqAXwwcVekLAChTVBf DCBwnQewhU8lYSnSFhP8KYAa1H2c/IOjJyfww73OmnGi2aDI4523AotHQT8ls+gv plAE/sslFFJXY+3SazRZ2JanWywc//Il6k/tDqA1s1nqGn+8TpHzSha7qlhYMIVb JnT996ht9BeNk5VEfPX8hdfR4diVU7NZgXTcR6g96uu6T6SZWyUo8Xe78SbzKKUh 2KD/a9fqJsyV8KChPrPX22XOz9/2a9ue/w+J/9FLdMnqydn8XbWzsYyDzbp6Nax7 8I4cilcVp+zRBH8hWQegQamzeIkaXM9JwPYPMnQOJDQ6Wf0X/gw= =o3nE -----END PGP SIGNATURE----- --=-=-=--