{"id":23186,"url":"https://patchwork.libcamera.org/api/patches/23186/?format=json","web_url":"https://patchwork.libcamera.org/patch/23186/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20250417113539.1137936-3-barnabas.pocze@ideasonboard.com>","date":"2025-04-17T11:35:39","name":"[v1,3/3] libcamera: controls: Implement `swap()`","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"d6b84a738adeaca6fc884f84e5763b3ca2018221","submitter":{"id":216,"url":"https://patchwork.libcamera.org/api/people/216/?format=json","name":"Barnabás Pőcze","email":"barnabas.pocze@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/23186/mbox/","series":[{"id":5131,"url":"https://patchwork.libcamera.org/api/series/5131/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=5131","date":"2025-04-17T11:35:37","name":"[v1,1/3] libcamera: controls: Give name to the union containing storage","version":1,"mbox":"https://patchwork.libcamera.org/series/5131/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/23186/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/23186/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 21B2AC3284\n\tfor ;\n\tThu, 17 Apr 2025 11:35:51 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 2DCA268AC0;\n\tThu, 17 Apr 2025 13:35:48 +0200 (CEST)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id E6E9C68AC0\n\tfor ;\n\tThu, 17 Apr 2025 13:35:43 +0200 (CEST)","from pb-laptop.local (185.221.143.16.nat.pool.zt.hu\n\t[185.221.143.16])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 4AF1311E9\n\tfor ;\n\tThu, 17 Apr 2025 13:33:40 +0200 (CEST)"],"Authentication-Results":"lancelot.ideasonboard.com; dkim=pass (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"OdA3h8Bw\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1744889620;\n\tbh=M06HT4DwU9iVSr+nbwhaqzltK+9vyl8VxWXUj7om2PU=;\n\th=From:To:Subject:Date:In-Reply-To:References:From;\n\tb=OdA3h8Bw6+2yZh9it1vtPALfmdgomf3QTw0ZgC/Ay0ZLxBeTccwUt57REhxZYUtZR\n\tIostv5Fqu49D6aTz1++Ch82fI0czBZgNpa/Kq06bazAjrqVqGHt9hOGdr1l9Uuc0PI\n\tTJQ5A5fBWrw3z7tj4GBO6JNpeEgK/oVugHhqKS40=","From":"=?utf-8?q?Barnab=C3=A1s_P=C5=91cze?= ","To":"libcamera-devel@lists.libcamera.org","Subject":"[PATCH v1 3/3] libcamera: controls: Implement `swap()`","Date":"Thu, 17 Apr 2025 13:35:39 +0200","Message-ID":"<20250417113539.1137936-3-barnabas.pocze@ideasonboard.com>","X-Mailer":"git-send-email 2.49.0","In-Reply-To":"<20250417113539.1137936-1-barnabas.pocze@ideasonboard.com>","References":"<20250417113539.1137936-1-barnabas.pocze@ideasonboard.com>","MIME-Version":"1.0","Content-Type":"text/plain; charset=UTF-8","Content-Transfer-Encoding":"8bit","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"Implement both free and member function `swap()` for `ControlValue`.\nThe general `std::swap()` swaps two values by combining a move construction\nand two move assignments, but for `ControlValue` a simpler implementation\ncan be provided by just swapping the members.\n\nSigned-off-by: Barnabás Pőcze \n---\n include/libcamera/controls.h | 24 ++++++++++++++++++++++++\n src/libcamera/controls.cpp | 15 +++++++++++++++\n 2 files changed, 39 insertions(+)","diff":"diff --git a/include/libcamera/controls.h b/include/libcamera/controls.h\nindex 86245e7a9..27b314dbc 100644\n--- a/include/libcamera/controls.h\n+++ b/include/libcamera/controls.h\n@@ -261,6 +261,30 @@ public:\n \tvoid reserve(ControlType type, bool isArray = false,\n \t\t std::size_t numElements = 1);\n \n+\tvoid swap(ControlValue &other) noexcept\n+\t{\n+\t\t{\n+\t\t\tauto tmp = type_;\n+\t\t\ttype_ = other.type_;\n+\t\t\tother.type_ = tmp;\n+\t\t}\n+\n+\t\tstd::swap(isArray_, other.isArray_);\n+\n+\t\t{\n+\t\t\tauto tmp = numElements_;\n+\t\t\tnumElements_ = other.numElements_;\n+\t\t\tother.numElements_ = tmp;\n+\t\t}\n+\n+\t\tstd::swap(storage_, other.storage_);\n+\t}\n+\n+\tfriend void swap(ControlValue &a, ControlValue &b) noexcept\n+\t{\n+\t\ta.swap(b);\n+\t}\n+\n private:\n \tControlType type_ : 8;\n \tbool isArray_;\ndiff --git a/src/libcamera/controls.cpp b/src/libcamera/controls.cpp\nindex 885287e71..c1ff60f39 100644\n--- a/src/libcamera/controls.cpp\n+++ b/src/libcamera/controls.cpp\n@@ -411,6 +411,21 @@ void ControlValue::reserve(ControlType type, bool isArray, std::size_t numElemen\n \t\tstorage_.external = new uint8_t[newSize];\n }\n \n+/**\n+ * \\fn ControlValue::swap(ControlValue &other) noexcept\n+ * \\brief Swap two control values\n+ *\n+ * This function swaps the contained value of \\a this with that of \\a other.\n+ */\n+\n+/**\n+ * \\fn ControlValue::swap(ControlValue &a, ControlValue &b) noexcept\n+ * \\brief Swap two control values\n+ *\n+ * This function swaps the contained value of \\a a with that of \\a b.\n+ * \\sa ControlValue::swap()\n+ */\n+\n /**\n * \\class ControlId\n * \\brief Control static metadata\n","prefixes":["v1","3/3"]}