libcamera/libcamera.git - libcamera official repository

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author	Laurent Pinchart <laurent.pinchart@ideasonboard.com>	2022-12-12 15:04:49 +0200
committer	Laurent Pinchart <laurent.pinchart@ideasonboard.com>	2022-12-12 15:51:39 +0200
commit	e653f4c13e32225c2d1c304f3e6c44ff4efbdfe9 (patch)
tree	721956a4c96200a87a4b8ddd84d3ac6b1f167dc0 /utils
parent	b026e4a6a0a620ce994938c3d1babd3f3df4a47e (diff)

Documentation: contributing: Add commit message guidelines

All developers, whether junior or experienced, can benefit from improving their commit message writing skills. Add a paragraph to the contribution documentation to explain this, with a link to a good guide. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>

Diffstat (limited to 'utils')

0 files changed, 0 insertions, 0 deletions

/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) 2019, Google Inc. * * event_loop.cpp - cam - Event loop */ #include "event_loop.h" #include <assert.h> #include <event2/event.h> #include <event2/thread.h> #include <iostream> EventLoop *EventLoop::instance_ = nullptr; EventLoop::EventLoop() { assert(!instance_); evthread_use_pthreads(); base_ = event_base_new(); instance_ = this; } EventLoop::~EventLoop() { instance_ = nullptr; events_.clear(); event_base_free(base_); libevent_global_shutdown(); } EventLoop *EventLoop::instance() { return instance_; } int EventLoop::exec() { exitCode_ = -1; event_base_loop(base_, EVLOOP_NO_EXIT_ON_EMPTY); return exitCode_; } void EventLoop::exit(int code) { exitCode_ = code; event_base_loopbreak(base_); } void EventLoop::callLater(const std::function<void()> &func) { { std::unique_lock<std::mutex> locker(lock_); calls_.push_back(func); } event_base_once(base_, -1, EV_TIMEOUT, dispatchCallback, this, nullptr); } void EventLoop::addFdEvent(int fd, EventType type, const std::function<void()> &callback) { std::unique_ptr<Event> event = std::make_unique<Event>(callback); short events = (type & Read ? EV_READ : 0) | (type & Write ? EV_WRITE : 0) | EV_PERSIST; event->event_ = event_new(base_, fd, events, &EventLoop::Event::dispatch, event.get()); if (!event->event_) { std::cerr << "Failed to create event for fd " << fd << std::endl; return; } int ret = event_add(event->event_, nullptr); if (ret < 0) { std::cerr << "Failed to add event for fd " << fd << std::endl; return; } events_.push_back(std::move(event)); } void EventLoop::addTimerEvent(const std::chrono::microseconds period, const std::function<void()> &callback) { std::unique_ptr<Event> event = std::make_unique<Event>(callback); event->event_ = event_new(base_, -1, EV_PERSIST, &EventLoop::Event::dispatch, event.get()); if (!event->event_) { std::cerr << "Failed to create timer event" << std::endl; return; } struct timeval tv; tv.tv_sec = period.count() / 1000000ULL; tv.tv_usec = period.count() % 1000000ULL; int ret = event_add(event->event_, &tv); if (ret < 0) { std::cerr << "Failed to add timer event" << std::endl; return; } events_.push_back(std::move(event)); } void EventLoop::dispatchCallback([[maybe_unused]] evutil_socket_t fd, [[maybe_unused]] short flags, void *param) { EventLoop *loop = static_cast<EventLoop *>(param); loop->dispatchCall(); } void EventLoop::dispatchCall() { std::function<void()> call; { std::unique_lock<std::mutex> locker(lock_); if (calls_.empty()) return; call = calls_.front(); calls_.pop_front(); } call(); } EventLoop::Event::Event(const std::function<void()> &callback) : callback_(callback), event_(nullptr) { } EventLoop::Event::~Event() { event_del(event_); event_free(event_); } void EventLoop::Event::dispatch([[maybe_unused]] int fd, [[maybe_unused]] short events, void *arg) { Event *event = static_cast<Event *>(arg); event->callback_(); }


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