From patchwork Sun Dec 6 22:04:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Ludovic_Court=C3=A8s?= X-Patchwork-Id: 25619 Return-Path: X-Original-To: patchwork@mira.cbaines.net Delivered-To: patchwork@mira.cbaines.net Received: by mira.cbaines.net (Postfix, from userid 113) id 973D027BC01; Sun, 6 Dec 2020 22:05:40 +0000 (GMT) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on mira.cbaines.net X-Spam-Level: X-Spam-Status: No, score=-2.9 required=5.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_MSPIKE_H4,RCVD_IN_MSPIKE_WL,SPF_HELO_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.2 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mira.cbaines.net (Postfix) with ESMTPS id 575FB27BC00 for ; Sun, 6 Dec 2020 22:05:40 +0000 (GMT) Received: from localhost ([::1]:34788 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1km29z-0001tE-IZ for patchwork@mira.cbaines.net; Sun, 06 Dec 2020 17:05:39 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:46470) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1km29Q-0001Kb-IN for guix-patches@gnu.org; Sun, 06 Dec 2020 17:05:04 -0500 Received: from debbugs.gnu.org ([209.51.188.43]:40043) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1km29Q-0003Kr-A4 for guix-patches@gnu.org; Sun, 06 Dec 2020 17:05:04 -0500 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1km29Q-0006SE-5j for guix-patches@gnu.org; Sun, 06 Dec 2020 17:05:04 -0500 X-Loop: help-debbugs@gnu.org Subject: [bug#45018] [PATCH v2 3/6] daemon: Factorize substituter agent spawning. Resent-From: Ludovic =?utf-8?q?Court=C3=A8s?= Original-Sender: "Debbugs-submit" Resent-CC: guix-patches@gnu.org Resent-Date: Sun, 06 Dec 2020 22:05:04 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 45018 X-GNU-PR-Package: guix-patches X-GNU-PR-Keywords: patch To: 45018@debbugs.gnu.org Cc: Ludovic =?utf-8?q?Court=C3=A8s?= Received: via spool by 45018-submit@debbugs.gnu.org id=B45018.160729229524750 (code B ref 45018); Sun, 06 Dec 2020 22:05:04 +0000 Received: (at 45018) by debbugs.gnu.org; 6 Dec 2020 22:04:55 +0000 Received: from localhost ([127.0.0.1]:51581 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1km29H-0006R2-Bh for submit@debbugs.gnu.org; Sun, 06 Dec 2020 17:04:55 -0500 Received: from eggs.gnu.org ([209.51.188.92]:56394) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1km29C-0006Q3-5m for 45018@debbugs.gnu.org; Sun, 06 Dec 2020 17:04:51 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]:44344) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1km294-0003Dr-2W; Sun, 06 Dec 2020 17:04:44 -0500 Received: from [2a01:e0a:1d:7270:af76:b9b:ca24:c465] (port=45440 helo=gnu.org) by fencepost.gnu.org with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1km293-00020D-L7; Sun, 06 Dec 2020 17:04:41 -0500 From: Ludovic =?utf-8?q?Court=C3=A8s?= Date: Sun, 6 Dec 2020 23:04:12 +0100 Message-Id: <20201206220415.23279-4-ludo@gnu.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201206220415.23279-1-ludo@gnu.org> References: <87o8janf50.fsf@gnu.org> <20201206220415.23279-1-ludo@gnu.org> MIME-Version: 1.0 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: guix-patches@gnu.org List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-patches-bounces+patchwork=mira.cbaines.net@gnu.org Sender: "Guix-patches" X-getmail-retrieved-from-mailbox: Patches * nix/libstore/local-store.hh (class LocalStore)[substituter]: New method. [runningSubstituter]: Turn into a shared_ptr. * nix/libstore/local-store.cc (LocalStore::querySubstitutablePaths): Call 'substituter' instead of using inline code. (LocalStore::querySubstitutablePathInfos): Likewise. (LocalStore::substituter): New method. --- nix/libstore/local-store.cc | 29 +++++++++++++---------------- nix/libstore/local-store.hh | 5 ++++- 2 files changed, 17 insertions(+), 17 deletions(-) diff --git a/nix/libstore/local-store.cc b/nix/libstore/local-store.cc index 4219573a56..c304e2ddd1 100644 --- a/nix/libstore/local-store.cc +++ b/nix/libstore/local-store.cc @@ -850,14 +850,7 @@ PathSet LocalStore::querySubstitutablePaths(const PathSet & paths) if (!settings.useSubstitutes || paths.empty()) return res; - if (!runningSubstituter) { - const Strings args = { "substitute", "--query" }; - const std::map env = { { "_NIX_OPTIONS", settings.pack() } }; - std::unique_ptr fresh(new Agent(settings.guixProgram, args, env)); - runningSubstituter.swap(fresh); - } - - Agent & run = *runningSubstituter; + Agent & run = *substituter(); string s = "have "; foreach (PathSet::const_iterator, j, paths) @@ -877,18 +870,22 @@ PathSet LocalStore::querySubstitutablePaths(const PathSet & paths) } +std::shared_ptr LocalStore::substituter() +{ + if (!runningSubstituter) { + const Strings args = { "substitute", "--query" }; + const std::map env = { { "_NIX_OPTIONS", settings.pack() } }; + runningSubstituter = std::make_shared(settings.guixProgram, args, env); + } + + return runningSubstituter; +} + void LocalStore::querySubstitutablePathInfos(PathSet & paths, SubstitutablePathInfos & infos) { if (!settings.useSubstitutes) return; - if (!runningSubstituter) { - const Strings args = { "substitute", "--query" }; - const std::map env = { { "_NIX_OPTIONS", settings.pack() } }; - std::unique_ptr fresh(new Agent(settings.guixProgram, args, env)); - runningSubstituter.swap(fresh); - } - - Agent & run = *runningSubstituter; + Agent & run = *substituter(); string s = "info "; foreach (PathSet::const_iterator, i, paths) diff --git a/nix/libstore/local-store.hh b/nix/libstore/local-store.hh index 57d15bac7e..9ba37219da 100644 --- a/nix/libstore/local-store.hh +++ b/nix/libstore/local-store.hh @@ -42,7 +42,10 @@ class LocalStore : public StoreAPI { private: /* The currently running substituter or empty. */ - std::unique_ptr runningSubstituter; + std::shared_ptr runningSubstituter; + + /* Ensure the substituter is running and return it. */ + std::shared_ptr substituter(); Path linksDir;