{"id":14930,"url":"https://patchwork.libcamera.org/api/1.1/patches/14930/?format=json","web_url":"https://patchwork.libcamera.org/patch/14930/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/1.1/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":"<20211201070728.3114247-5-hiroh@chromium.org>","date":"2021-12-01T07:07:20","name":"[libcamera-devel,v4,04/12] libcamera: base: Add thread safety annotation macros","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"8002765e49fd7a23f7f9a69ae96080e7f2fd6469","submitter":{"id":63,"url":"https://patchwork.libcamera.org/api/1.1/people/63/?format=json","name":"Hirokazu Honda","email":"hiroh@chromium.org"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/14930/mbox/","series":[{"id":2789,"url":"https://patchwork.libcamera.org/api/1.1/series/2789/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=2789","date":"2021-12-01T07:07:16","name":"Introduce clang thread safety annotations","version":4,"mbox":"https://patchwork.libcamera.org/series/2789/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/14930/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/14930/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 E1590BF415\n\tfor ;\n\tWed, 1 Dec 2021 07:07:45 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 9D2A560718;\n\tWed, 1 Dec 2021 08:07:45 +0100 (CET)","from mail-pf1-x436.google.com (mail-pf1-x436.google.com\n\t[IPv6:2607:f8b0:4864:20::436])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 5FA546072E\n\tfor ;\n\tWed, 1 Dec 2021 08:07:43 +0100 (CET)","by mail-pf1-x436.google.com with SMTP id n26so23435997pff.3\n\tfor ;\n\tTue, 30 Nov 2021 23:07:43 -0800 (PST)","from hiroh2.tok.corp.google.com\n\t([2401:fa00:8f:203:3892:a049:59ba:c772])\n\tby smtp.gmail.com with ESMTPSA id\n\tm10sm16598962pgv.75.2021.11.30.23.07.40\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n\tTue, 30 Nov 2021 23:07:41 -0800 (PST)"],"Authentication-Results":"lancelot.ideasonboard.com;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n\tunprotected) header.d=chromium.org header.i=@chromium.org\n\theader.b=\"MXf5iUhT\"; 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\n\tTue, 30 Nov 2021 23:07:41 -0800 (PST)","From":"Hirokazu Honda ","To":"libcamera-devel@lists.libcamera.org","Date":"Wed, 1 Dec 2021 16:07:20 +0900","Message-Id":"<20211201070728.3114247-5-hiroh@chromium.org>","X-Mailer":"git-send-email 2.34.0.rc2.393.gf8c9666880-goog","In-Reply-To":"<20211201070728.3114247-1-hiroh@chromium.org>","References":"<20211201070728.3114247-1-hiroh@chromium.org>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","Subject":"[libcamera-devel] [PATCH v4 04/12] libcamera: base: Add thread\n\tsafety annotation macros","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":"Clang compiler is able to do a thread safety analysis with\nannotations [1]. This introduces the thread safety annotation\nmacros and also enable the analysis by adding -Wthread-safety\nif a clang compiler is used.\n\n[1] https://clang.llvm.org/docs/ThreadSafetyAnalysis.html.\n\nSigned-off-by: Hirokazu Honda \nReviewed-by: Laurent Pinchart \n---\n include/libcamera/base/meson.build | 1 +\n include/libcamera/base/thread_annotations.h | 80 +++++++++++++++++++++\n meson.build | 1 +\n 3 files changed, 82 insertions(+)\n create mode 100644 include/libcamera/base/thread_annotations.h","diff":"diff --git a/include/libcamera/base/meson.build b/include/libcamera/base/meson.build\nindex 525aba9d..1a71ce5a 100644\n--- a/include/libcamera/base/meson.build\n+++ b/include/libcamera/base/meson.build\n@@ -19,6 +19,7 @@ libcamera_base_headers = files([\n 'signal.h',\n 'span.h',\n 'thread.h',\n+ 'thread_annotations.h',\n 'timer.h',\n 'utils.h',\n ])\ndiff --git a/include/libcamera/base/thread_annotations.h b/include/libcamera/base/thread_annotations.h\nnew file mode 100644\nindex 00000000..e81929f6\n--- /dev/null\n+++ b/include/libcamera/base/thread_annotations.h\n@@ -0,0 +1,80 @@\n+/* SPDX-License-Identifier: LGPL-2.1-or-later */\n+/*\n+ * Copyright (C) 2021, Google Inc.\n+ *\n+ * thread_annotation.h - Macro of Clang thread safety analysis\n+ */\n+\n+#pragma once\n+\n+/*\n+ * Enable thread safety attributes only with clang.\n+ * The attributes can be safely erased when compiling with other compilers.\n+ */\n+#if defined(__clang__) && !defined(SWIG)\n+#define LIBCAMERA_TSA_ATTRIBUTE__(x) __attribute__((x))\n+#else\n+#define LIBCAMERA_TSA_ATTRIBUTE__(x) /* no-op */\n+#endif\n+\n+/* See https://clang.llvm.org/docs/ThreadSafetyAnalysis.html for these usages. */\n+\n+#define LIBCAMERA_TSA_CAPABILITY(x)\t\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(capability(x))\n+\n+#define LIBCAMERA_TSA_SCOPED_CAPABILITY\t\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(scoped_lockable)\n+\n+#define LIBCAMERA_TSA_GUARDED_BY(x)\t\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(guarded_by(x))\n+\n+#define LIBCAMERA_TSA_PT_GUARDED_BY(x)\t\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(pt_guarded_by(x))\n+\n+#define LIBCAMERA_TSA_ACQUIRED_BEFORE(...)\t\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(acquired_before(__VA_ARGS__))\n+\n+#define LIBCAMERA_TSA_ACQUIRED_AFTER(...)\t\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(acquired_after(__VA_ARGS__))\n+\n+#define LIBCAMERA_TSA_REQUIRES(...)\t\t\t\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(requires_capability(__VA_ARGS__))\n+\n+#define LIBCAMERA_TSA_REQUIRES_SHARED(...)\t\t\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(requires_shared_capability(__VA_ARGS__))\n+\n+#define LIBCAMERA_TSA_ACQUIRE(...)\t\t\t\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(acquire_capability(__VA_ARGS__))\n+\n+#define LIBCAMERA_TSA_ACQUIRE_SHARED(...)\t\t\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(acquire_shared_capability(__VA_ARGS__))\n+\n+#define LIBCAMERA_TSA_RELEASE(...)\t\t\t\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(release_capability(__VA_ARGS__))\n+\n+#define LIBCAMERA_TSA_RELEASE_SHARED(...)\t\t\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(release_shared_capability(__VA_ARGS__))\n+\n+#define LIBCAMERA_TSA_RELEASE_GENERIC(...)\t\t\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(release_generic_capability(__VA_ARGS__))\n+\n+#define LIBCAMERA_TSA_TRY_ACQUIRE(...)\t\t\t\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(try_acquire_capability(__VA_ARGS__))\n+\n+#define LIBCAMERA_TSA_TRY_ACQUIRE_SHARED(...)\t\t\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(try_acquire_shared_capability(__VA_ARGS__))\n+\n+#define LIBCAMERA_TSA_EXCLUDES(...)\t\t\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(locks_excluded(__VA_ARGS__))\n+\n+#define LIBCAMERA_TSA_ASSERT_CAPABILITY(x)\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(assert_capability(x))\n+\n+#define LIBCAMERA_TSA_ASSERT_SHARED_CAPABILITY(x)\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(assert_shared_capability(x))\n+\n+#define LIBCAMERA_TSA_RETURN_CAPABILITY(x)\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(lock_returned(x))\n+\n+#define LIBCAMERA_TSA_NO_THREAD_SAFETY_ANALYSIS\t\t\t\\\n+\tLIBCAMERA_TSA_ATTRIBUTE__(no_thread_safety_analysis)\ndiff --git a/meson.build b/meson.build\nindex 7892a9e3..7147a108 100644\n--- a/meson.build\n+++ b/meson.build\n@@ -72,6 +72,7 @@ if cc.get_id() == 'clang'\n \n cpp_arguments += [\n '-Wextra-semi',\n+ '-Wthread-safety',\n ]\n endif\n \n","prefixes":["libcamera-devel","v4","04/12"]}