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{ "id": 167, "url": "https://patchwork.libcamera.org/api/1.1/patches/167/?format=api", "web_url": "https://patchwork.libcamera.org/patch/167/", "project": { "id": 1, "url": "https://patchwork.libcamera.org/api/1.1/projects/1/?format=api", "name": "libcamera", "link_name": "libcamera", "list_id": "libcamera_core", "list_email": "libcamera-devel@lists.libcamera.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20190107231151.23291-5-laurent.pinchart@ideasonboard.com>", "date": "2019-01-07T23:11:44", "name": "[libcamera-devel,v2,04/11] libcamera: camera_manager: Make the class a singleton", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": false, "hash": "ed8049205e7b0a1b7827f2e15bfed37fb3051bdc", "submitter": { "id": 2, "url": "https://patchwork.libcamera.org/api/1.1/people/2/?format=api", "name": "Laurent Pinchart", "email": "laurent.pinchart@ideasonboard.com" }, "delegate": null, "mbox": "https://patchwork.libcamera.org/patch/167/mbox/", "series": [ { "id": 56, "url": "https://patchwork.libcamera.org/api/1.1/series/56/?format=api", "web_url": "https://patchwork.libcamera.org/project/libcamera/list/?series=56", "date": "2019-01-07T23:11:40", "name": "libcamera: Add event notification and timers", "version": 2, "mbox": "https://patchwork.libcamera.org/series/56/mbox/" } ], "comments": "https://patchwork.libcamera.org/api/patches/167/comments/", "check": "pending", "checks": "https://patchwork.libcamera.org/api/patches/167/checks/", "tags": {}, "headers": { "Return-Path": "<laurent.pinchart@ideasonboard.com>", "Received": [ "from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id D2A1B60B31\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tTue, 8 Jan 2019 00:10:48 +0100 (CET)", "from avalon.bb.dnainternet.fi\n\t(dfj612ybrt5fhg77mgycy-3.rev.dnainternet.fi\n\t[IPv6:2001:14ba:21f5:5b00:2e86:4862:ef6a:2804])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id 707A8E4E\n\tfor <libcamera-devel@lists.libcamera.org>;\n\tTue, 8 Jan 2019 00:10:48 +0100 (CET)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com;\n\ts=mail; t=1546902648;\n\tbh=UJI6UaC1EAZPRNdZguGohhk0zzUbkT6HuCDJAn3gmjM=;\n\th=From:To:Subject:Date:In-Reply-To:References:From;\n\tb=l8YXNdCfEDginB8ahFaBQ6kQExpj3/sKlrKqCrwj+1K46iJp6ByonRzTG2reQMca9\n\tyOkpzVACUvYCoaBy8sEJjZxkALGLEw/pauhbyXrHIoHZqV3qCHoVhpDA5i6agQkDq3\n\tltlFuYVHmf2OWWdxdWDTOnUuZh5sBVuqkU1hzZHk=", "From": "Laurent Pinchart <laurent.pinchart@ideasonboard.com>", "To": "libcamera-devel@lists.libcamera.org", "Date": "Tue, 8 Jan 2019 01:11:44 +0200", "Message-Id": "<20190107231151.23291-5-laurent.pinchart@ideasonboard.com>", "X-Mailer": "git-send-email 2.19.2", "In-Reply-To": "<20190107231151.23291-1-laurent.pinchart@ideasonboard.com>", "References": "<20190107231151.23291-1-laurent.pinchart@ideasonboard.com>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit", "Subject": "[libcamera-devel] [PATCH v2 04/11] libcamera: camera_manager: Make\n\tthe class a singleton", "X-BeenThere": "libcamera-devel@lists.libcamera.org", "X-Mailman-Version": "2.1.23", "Precedence": "list", "List-Id": "<libcamera-devel.lists.libcamera.org>", "List-Unsubscribe": "<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>", "List-Archive": "<https://lists.libcamera.org/pipermail/libcamera-devel/>", "List-Post": "<mailto:libcamera-devel@lists.libcamera.org>", "List-Help": "<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>", "List-Subscribe": "<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>", "X-List-Received-Date": "Mon, 07 Jan 2019 23:10:49 -0000" }, "content": "There can only be a single camera manager instance in the application.\nCreating it as a singleton helps avoiding mistakes. It also allows the\ncamera manager to be used as a storage of global data, such as the\nfuture event dispatcher.\n\nSigned-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>\nReviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>\nReviewed-by: Jacopo Mondi <jacopo@jmondi.org>\n---\nChanges since v1:\n\n- Delete copy constructor and assignment operator\n- Fix documentation style issue\n---\n include/libcamera/camera_manager.h | 8 ++++++--\n src/libcamera/camera_manager.cpp | 15 +++++++++++++++\n test/list.cpp | 7 +------\n 3 files changed, 22 insertions(+), 8 deletions(-)", "diff": "diff --git a/include/libcamera/camera_manager.h b/include/libcamera/camera_manager.h\nindex 2768a5bd2384..e14da0f893b3 100644\n--- a/include/libcamera/camera_manager.h\n+++ b/include/libcamera/camera_manager.h\n@@ -19,15 +19,19 @@ class PipelineHandler;\n class CameraManager\n {\n public:\n-\tCameraManager();\n-\n \tint start();\n \tvoid stop();\n \n \tstd::vector<std::string> list() const;\n \tCamera *get(const std::string &name);\n \n+\tstatic CameraManager *instance();\n+\n private:\n+\tCameraManager();\n+\tCameraManager(const CameraManager &) = delete;\n+\tvoid operator=(const CameraManager &) = delete;\n+\n \tDeviceEnumerator *enumerator_;\n \tstd::vector<PipelineHandler *> pipes_;\n };\ndiff --git a/src/libcamera/camera_manager.cpp b/src/libcamera/camera_manager.cpp\nindex 50a805fc665c..1a9d2f38e3b9 100644\n--- a/src/libcamera/camera_manager.cpp\n+++ b/src/libcamera/camera_manager.cpp\n@@ -161,4 +161,19 @@ Camera *CameraManager::get(const std::string &name)\n \treturn nullptr;\n }\n \n+/**\n+ * \\brief Retrieve the camera manager instance\n+ *\n+ * The CameraManager is a singleton and can't be constructed manually. This\n+ * function shall instead be used to retrieve the single global instance of the\n+ * manager.\n+ *\n+ * \\return The camera manager instance\n+ */\n+CameraManager *CameraManager::instance()\n+{\n+\tstatic CameraManager manager;\n+\treturn &manager;\n+}\n+\n } /* namespace libcamera */\ndiff --git a/test/list.cpp b/test/list.cpp\nindex 39b8a41d1fef..e2026c99c5b8 100644\n--- a/test/list.cpp\n+++ b/test/list.cpp\n@@ -19,10 +19,7 @@ class ListTest : public Test\n protected:\n \tint init()\n \t{\n-\t\tcm = new CameraManager();\n-\t\tif (!cm)\n-\t\t\treturn -ENOMEM;\n-\n+\t\tcm = CameraManager::instance();\n \t\tcm->start();\n \n \t\treturn 0;\n@@ -43,8 +40,6 @@ protected:\n \tvoid cleanup()\n \t{\n \t\tcm->stop();\n-\n-\t\tdelete cm;\n \t}\n \n private:\n", "prefixes": [ "libcamera-devel", "v2", "04/11" ] }