{"id":10052,"url":"https://patchwork.libcamera.org/api/patches/10052/?format=json","web_url":"https://patchwork.libcamera.org/patch/10052/","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":"<20201013151241.3557005-7-kieran.bingham@ideasonboard.com>","date":"2020-10-13T15:12:37","name":"[libcamera-devel,06/10] libcamera: v4l2_videodevice: Prevent aliasing of V4L2BufferCache members","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"0cacb3a806013e817dcdb4735e51ce83d591fe55","submitter":{"id":4,"url":"https://patchwork.libcamera.org/api/people/4/?format=json","name":"Kieran Bingham","email":"kieran.bingham@ideasonboard.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/10052/mbox/","series":[{"id":1374,"url":"https://patchwork.libcamera.org/api/series/1374/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=1374","date":"2020-10-13T15:12:31","name":"Shadowed Variables","version":1,"mbox":"https://patchwork.libcamera.org/series/1374/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/10052/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/10052/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 B2EE7BEEDF\n\tfor ;\n\tTue, 13 Oct 2020 15:12:54 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 7E78C60E88;\n\tTue, 13 Oct 2020 17:12:54 +0200 (CEST)","from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 872E460E80\n\tfor ;\n\tTue, 13 Oct 2020 17:12:48 +0200 (CEST)","from Q.local (cpc89244-aztw30-2-0-cust3082.18-1.cable.virginm.net\n\t[86.31.172.11])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 1F62D18B6;\n\tTue, 13 Oct 2020 17:12:48 +0200 (CEST)"],"Authentication-Results":"lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=ideasonboard.com header.i=@ideasonboard.com\n\theader.b=\"i+GIsCnj\"; dkim-atps=neutral","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1602601968;\n\tbh=ZZUwCfpXniT+0vCCWQbxSMtwFSjSo2vMgh7C34i63Kg=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=i+GIsCnjQ3+2YjFZBOKh20tuVJQXMnee38V+MdH924UJIMvwcwllbCQL2ikDA0ef+\n\tELTvLPgcYasfHgLpRCW00g/a9iH1hTbzwOBA4zK9eBqAx/XCf34O2UnaV065va1ZcY\n\tBWKpxpWFDoELFwB+skHK1yG3dOZXwY5dygOs/G98=","From":"Kieran Bingham ","To":"libcamera devel ","Date":"Tue, 13 Oct 2020 16:12:37 +0100","Message-Id":"<20201013151241.3557005-7-kieran.bingham@ideasonboard.com>","X-Mailer":"git-send-email 2.25.1","In-Reply-To":"<20201013151241.3557005-1-kieran.bingham@ideasonboard.com>","References":"<20201013151241.3557005-1-kieran.bingham@ideasonboard.com>","MIME-Version":"1.0","Subject":"[libcamera-devel] [PATCH 06/10] libcamera: v4l2_videodevice:\n\tPrevent aliasing of V4L2BufferCache members","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","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"The members free, and lastUsed were not following the libcamera coding\nstyle, and were producing an aliased parameter on the construction.\n\nRename them to be marked as member variables with the _ postfix\naccordingly.\n\nSigned-off-by: Kieran Bingham \n---\n include/libcamera/internal/v4l2_videodevice.h | 4 ++--\n src/libcamera/v4l2_videodevice.cpp | 14 +++++++-------\n 2 files changed, 9 insertions(+), 9 deletions(-)","diff":"diff --git a/include/libcamera/internal/v4l2_videodevice.h b/include/libcamera/internal/v4l2_videodevice.h\nindex 40ed87e17cfa..53f6a2d5515b 100644\n--- a/include/libcamera/internal/v4l2_videodevice.h\n+++ b/include/libcamera/internal/v4l2_videodevice.h\n@@ -127,8 +127,8 @@ private:\n \n \t\tbool operator==(const FrameBuffer &buffer) const;\n \n-\t\tbool free;\n-\t\tuint64_t lastUsed;\n+\t\tbool free_;\n+\t\tuint64_t lastUsed_;\n \n \tprivate:\n \t\tstruct Plane {\ndiff --git a/src/libcamera/v4l2_videodevice.cpp b/src/libcamera/v4l2_videodevice.cpp\nindex 508522ef42bb..96952b26c634 100644\n--- a/src/libcamera/v4l2_videodevice.cpp\n+++ b/src/libcamera/v4l2_videodevice.cpp\n@@ -212,7 +212,7 @@ int V4L2BufferCache::get(const FrameBuffer &buffer)\n \tfor (unsigned int index = 0; index < cache_.size(); index++) {\n \t\tconst Entry &entry = cache_[index];\n \n-\t\tif (!entry.free)\n+\t\tif (!entry.free_)\n \t\t\tcontinue;\n \n \t\t/* Try to find a cache hit by comparing the planes. */\n@@ -222,9 +222,9 @@ int V4L2BufferCache::get(const FrameBuffer &buffer)\n \t\t\tbreak;\n \t\t}\n \n-\t\tif (entry.lastUsed < oldest) {\n+\t\tif (entry.lastUsed_ < oldest) {\n \t\t\tuse = index;\n-\t\t\toldest = entry.lastUsed;\n+\t\t\toldest = entry.lastUsed_;\n \t\t}\n \t}\n \n@@ -248,16 +248,16 @@ int V4L2BufferCache::get(const FrameBuffer &buffer)\n void V4L2BufferCache::put(unsigned int index)\n {\n \tASSERT(index < cache_.size());\n-\tcache_[index].free = true;\n+\tcache_[index].free_ = true;\n }\n \n V4L2BufferCache::Entry::Entry()\n-\t: free(true), lastUsed(0)\n+\t: free_(true), lastUsed_(0)\n {\n }\n \n-V4L2BufferCache::Entry::Entry(bool free, uint64_t lastUsed, const FrameBuffer &buffer)\n-\t: free(free), lastUsed(lastUsed)\n+V4L2BufferCache::Entry::Entry(bool free, uint64_t age, const FrameBuffer &buffer)\n+\t: free_(free), lastUsed_(age)\n {\n \tfor (const FrameBuffer::Plane &plane : buffer.planes())\n \t\tplanes_.emplace_back(plane);\n","prefixes":["libcamera-devel","06/10"]}