59 lines
1.1 KiB
C++
59 lines
1.1 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 "io/UniqueFileDescriptor.hxx"
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#include <cstdint>
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#include <sys/epoll.h>
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/**
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* A class that wraps Linux epoll.
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*/
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class EpollFD {
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UniqueFileDescriptor fd;
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public:
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/**
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* Throws on error.
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*/
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EpollFD();
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EpollFD(EpollFD &&) = default;
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EpollFD &operator=(EpollFD &&) = default;
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FileDescriptor GetFileDescriptor() const noexcept {
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return fd;
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}
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int Wait(epoll_event *events, int maxevents, int timeout) noexcept {
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return ::epoll_wait(fd.Get(), events, maxevents, timeout);
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}
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bool Control(int op, int _fd, epoll_event *event) noexcept {
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return ::epoll_ctl(fd.Get(), op, _fd, event) >= 0;
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}
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bool Add(int _fd, uint32_t events, void *ptr) noexcept {
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epoll_event e;
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e.events = events;
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e.data.ptr = ptr;
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return Control(EPOLL_CTL_ADD, _fd, &e);
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}
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bool Modify(int _fd, uint32_t events, void *ptr) noexcept {
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epoll_event e;
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e.events = events;
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e.data.ptr = ptr;
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return Control(EPOLL_CTL_MOD, _fd, &e);
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}
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bool Remove(int _fd) noexcept {
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return Control(EPOLL_CTL_DEL, _fd, nullptr);
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}
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};
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