67 lines
1.3 KiB
C++
67 lines
1.3 KiB
C++
// SPDX-License-Identifier: BSD-2-Clause
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// author: Max Kellermann <max.kellermann@gmail.com>
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#pragma once
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#include "system/EpollFD.hxx"
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#include <array>
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#include <algorithm>
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class EpollBackendResult
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{
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friend class EpollBackend;
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std::array<epoll_event, 16> events;
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size_t n_events = 0;
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public:
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size_t GetSize() const noexcept {
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return n_events;
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}
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unsigned GetEvents(size_t i) const noexcept {
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return events[i].events;
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}
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void *GetObject(size_t i) const noexcept {
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return events[i].data.ptr;
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}
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};
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class EpollBackend
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{
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EpollFD epoll;
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EpollBackend(EpollBackend &) = delete;
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EpollBackend &operator=(EpollBackend &) = delete;
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public:
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EpollBackend() = default;
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auto ReadEvents(int timeout_ms) noexcept {
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EpollBackendResult result;
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int ret = epoll.Wait(result.events.data(), result.events.size(),
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timeout_ms);
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result.n_events = std::max(0, ret);
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return result;
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}
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bool Add(int fd, unsigned events, void *obj) noexcept {
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return epoll.Add(fd, events, obj);
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}
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bool Modify(int fd, unsigned events, void *obj) noexcept {
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return epoll.Modify(fd, events, obj);
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}
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bool Remove(int fd) noexcept {
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return epoll.Remove(fd);
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}
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bool Abandon([[maybe_unused]] int fd) noexcept {
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// Nothing to do in this implementation.
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// Closed descriptors are automatically unregistered.
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return true;
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}
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};
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