From 71ef5532d9777e9511bc982cab33e3d2d95cf4be Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Wed, 23 Jan 2019 10:17:21 +0200 Subject: cam: Add event loop MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add a simple event loop to the cam application and use it in the main() function, with an example of how to handle SIGINT to gracefully stop the loop. Signed-off-by: Laurent Pinchart Reviewed-by: Niklas Söderlund --- src/cam/event_loop.cpp | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 src/cam/event_loop.cpp (limited to 'src/cam/event_loop.cpp') diff --git a/src/cam/event_loop.cpp b/src/cam/event_loop.cpp new file mode 100644 index 00000000..e8ab8617 --- /dev/null +++ b/src/cam/event_loop.cpp @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2019, Google Inc. + * + * event_loop.cpp - cam - Event loop + */ + +#include + +#include "event_loop.h" + +using namespace libcamera; + +EventLoop::EventLoop(EventDispatcher *dispatcher) + : dispatcher_(dispatcher) +{ +} + +EventLoop::~EventLoop() +{ +} + +int EventLoop::exec() +{ + exitCode_ = -1; + exit_.store(false, std::memory_order_release); + + while (!exit_.load(std::memory_order_acquire)) + dispatcher_->processEvents(); + + return exitCode_; +} + +void EventLoop::exit(int code) +{ + exitCode_ = code; + exit_.store(true, std::memory_order_release); + dispatcher_->interrupt(); +} -- cgit v1.2.1