56 lines
1.4 KiB
C++
56 lines
1.4 KiB
C++
#include "event_manager.hh"
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#include <algorithm>
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namespace Kakoune
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{
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void EventManager::watch(int fd, EventHandler handler)
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{
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auto event = std::find_if(m_events.begin(), m_events.end(),
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[&](const pollfd& pfd) { return pfd.fd == fd; });
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if (event != m_events.end())
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throw runtime_error("fd already watched");
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m_events.push_back(pollfd{ fd, POLLIN | POLLPRI, 0 });
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m_handlers.emplace(fd, std::move(handler));
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}
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void EventManager::unwatch(int fd)
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{
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// do not unwatch now, do that at the end of handle_next_events,
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// so that if unwatch(fd) is called from fd event handler,
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// it is not deleted now.
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m_unwatched.push_back(fd);
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}
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void EventManager::handle_next_events()
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{
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const int timeout_ms = 100;
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poll(m_events.data(), m_events.size(), timeout_ms);
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for (auto& event : m_events)
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{
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const int fd = event.fd;
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if ((event.revents or contains(m_forced, fd)) and not contains(m_unwatched, fd))
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m_handlers[fd](fd);
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}
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// remove unwatched.
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for (auto fd : m_unwatched)
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{
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auto it = std::find_if(m_events.begin(), m_events.end(),
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[fd](pollfd& p) { return p.fd == fd; });
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m_events.erase(it);
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m_handlers.erase(fd);
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}
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m_unwatched.clear();
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m_forced.clear();
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}
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void EventManager::force_signal(int fd)
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{
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m_forced.push_back(fd);
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}
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}
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