73 lines
1.6 KiB
C++
73 lines
1.6 KiB
C++
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/**
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* @file EventLoop.cpp
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* @author apio (cloudapio.eu)
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* @brief Base class for event-driven applications.
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*
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* @copyright Copyright (c) 2023, the Luna authors.
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*
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*/
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#include <errno.h>
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#include <os/EventLoop.h>
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#include <os/File.h>
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#include <string.h>
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static os::EventLoop* s_the = nullptr;
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namespace os
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{
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EventLoop::EventLoop()
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{
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s_the = this;
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}
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EventLoop::~EventLoop()
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{
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s_the = nullptr;
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}
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EventLoop& EventLoop::the()
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{
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check(s_the);
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return *s_the;
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}
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Result<void> EventLoop::register_fd_listener(int fd, void (*listener)(int, int))
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{
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TRY(m_fd_listeners.try_set(fd, listener));
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TRY(m_pollfds.try_append({ .fd = fd, .events = POLLIN, .revents = 0 }));
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return {};
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}
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int EventLoop::run()
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{
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while (!m_should_quit)
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{
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for (auto& pfd : m_pollfds) { pfd.revents = 0; }
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int rc = poll(m_pollfds.data(), m_pollfds.size(), 1000);
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if (!rc) continue;
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if (rc < 0 && errno != EINTR)
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{
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os::println("poll: error: %s", strerror(errno));
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return 1;
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}
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for (usize i = 0; i < m_fd_listeners.size(); i++)
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{
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if (m_pollfds[i].revents)
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m_fd_listeners.try_get(m_pollfds[i].fd)
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.value()(m_pollfds[i].fd, m_pollfds[i].revents); // Invoke the callback
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}
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}
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return m_quit_status;
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}
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void EventLoop::quit(int status)
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{
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m_quit_status = status;
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m_should_quit = true;
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}
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}
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