{"id":15650,"url":"https://patchwork.libcamera.org/api/1.1/patches/15650/?format=json","web_url":"https://patchwork.libcamera.org/patch/15650/","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":"<20220407132101.33140-1-ecurtin@redhat.com>","date":"2022-04-07T13:21:00","name":"[libcamera-devel,v6,1/2] cam: event_loop: Add timer events to event loop","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"55187179c800df8834966e2c57deba402cfae887","submitter":{"id":101,"url":"https://patchwork.libcamera.org/api/1.1/people/101/?format=json","name":"Eric Curtin","email":"ecurtin@redhat.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/15650/mbox/","series":[{"id":3043,"url":"https://patchwork.libcamera.org/api/1.1/series/3043/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=3043","date":"2022-04-07T13:21:00","name":"[libcamera-devel,v6,1/2] cam: event_loop: Add timer events to event loop","version":6,"mbox":"https://patchwork.libcamera.org/series/3043/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/15650/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/15650/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 48836C0F1B\n\tfor ;\n\tThu, 7 Apr 2022 13:21:18 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id 8F64965642;\n\tThu, 7 Apr 2022 15:21:17 +0200 (CEST)","from us-smtp-delivery-124.mimecast.com\n\t(us-smtp-delivery-124.mimecast.com [170.10.129.124])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id D5C956563F\n\tfor ;\n\tThu, 7 Apr 2022 15:21:15 +0200 (CEST)","from mail-wm1-f69.google.com (mail-wm1-f69.google.com\n\t[209.85.128.69]) by relay.mimecast.com with ESMTP with STARTTLS\n\t(version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id\n\tus-mta-489--yYrI10mMcGE8DDfRK708A-1; 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\n\tThu, 07 Apr 2022 06:21:11 -0700 (PDT)","by 2002:a1c:4e01:0:b0:38c:b316:e6f5 with SMTP id\n\tg1-20020a1c4e01000000b0038cb316e6f5mr12266324wmh.93.1649337671510; \n\tThu, 07 Apr 2022 06:21:11 -0700 (PDT)"],"X-Google-Smtp-Source":"ABdhPJxH926Wj30IKvetJ2aOlDGuY6rj0ANy/+bhERg+DvKdHrUWsyzjTmsx/D9nxFdgrZBA0DkKZQ==","To":"libcamera-devel@lists.libcamera.org","Date":"Thu, 7 Apr 2022 14:21:00 +0100","Message-Id":"<20220407132101.33140-1-ecurtin@redhat.com>","X-Mailer":"git-send-email 2.35.1","MIME-Version":"1.0","X-Mimecast-Spam-Score":"0","X-Mimecast-Originator":"redhat.com","Content-Transfer-Encoding":"8bit","Content-Type":"text/plain; charset=\"US-ASCII\"; x-default=true","Subject":"[libcamera-devel] [PATCH v6 1/2] cam: event_loop: Add timer events\n\tto event loop","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","From":"Eric Curtin via libcamera-devel ","Reply-To":"Eric Curtin ","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"Extend the EventLoop class to support periodic timer events. This can be\nused to run tasks periodically, such as handling the event loop of SDL.\n\nSigned-off-by: Eric Curtin \n---\n src/cam/event_loop.cpp | 37 +++++++++++++++++++++++++++++++++----\n src/cam/event_loop.h | 3 +++\n 2 files changed, 36 insertions(+), 4 deletions(-)","diff":"diff --git a/src/cam/event_loop.cpp b/src/cam/event_loop.cpp\nindex e25784c0..1e1a4269 100644\n--- a/src/cam/event_loop.cpp\n+++ b/src/cam/event_loop.cpp\n@@ -60,6 +60,17 @@ void EventLoop::callLater(const std::function &func)\n \tevent_base_once(base_, -1, EV_TIMEOUT, dispatchCallback, this, nullptr);\n }\n \n+int EventLoop::eventNew(const std::unique_ptr &event, const int fd, const short events)\n+{\n+\tevent->event_ = event_new(base_, fd, events, &EventLoop::Event::dispatch, event.get());\n+\tif (!event->event_) {\n+\t\tstd::cerr << \"Failed to create event for fd \" << fd << std::endl;\n+\t\treturn -EINVAL;\n+\t}\n+\n+\treturn 0;\n+}\n+\n void EventLoop::addEvent(int fd, EventType type,\n \t\t\t const std::function &callback)\n {\n@@ -68,10 +79,7 @@ void EventLoop::addEvent(int fd, EventType type,\n \t\t | (type & Write ? EV_WRITE : 0)\n \t\t | EV_PERSIST;\n \n-\tevent->event_ = event_new(base_, fd, events, &EventLoop::Event::dispatch,\n-\t\t\t\t event.get());\n-\tif (!event->event_) {\n-\t\tstd::cerr << \"Failed to create event for fd \" << fd << std::endl;\n+\tif (eventNew(event, fd, events)) {\n \t\treturn;\n \t}\n \n@@ -84,6 +92,27 @@ void EventLoop::addEvent(int fd, EventType type,\n \tevents_.push_back(std::move(event));\n }\n \n+void EventLoop::addTimerEvent(const suseconds_t period,\n+\t\t\t const std::function &callback)\n+{\n+\tstd::unique_ptr event = std::make_unique(callback);\n+\tif (eventNew(event, -1, EV_PERSIST)) {\n+\t\treturn;\n+\t}\n+\n+\tstruct timeval tv;\n+\ttv.tv_sec = 0;\n+\ttv.tv_usec = period;\n+\n+\tint ret = event_add(event->event_, &tv);\n+\tif (ret < 0) {\n+\t\tstd::cerr << \"Failed to add timer event\" << std::endl;\n+\t\treturn;\n+\t}\n+\n+\tevents_.push_back(std::move(event));\n+}\n+\n void EventLoop::dispatchCallback([[maybe_unused]] evutil_socket_t fd,\n \t\t\t\t [[maybe_unused]] short flags, void *param)\n {\ndiff --git a/src/cam/event_loop.h b/src/cam/event_loop.h\nindex a4613eb2..3d3561e5 100644\n--- a/src/cam/event_loop.h\n+++ b/src/cam/event_loop.h\n@@ -36,6 +36,8 @@ public:\n \n \tvoid addEvent(int fd, EventType type,\n \t\t const std::function &handler);\n+\tvoid addTimerEvent(const suseconds_t period,\n+\t\t\t const std::function &handler);\n \n private:\n \tstruct Event {\n@@ -60,4 +62,5 @@ private:\n \tstatic void dispatchCallback(evutil_socket_t fd, short flags,\n \t\t\t\t void *param);\n \tvoid dispatchCall();\n+\tint eventNew(const std::unique_ptr &event, const int fd, const short events);\n };\n","prefixes":["libcamera-devel","v6","1/2"]}