82 lines
1.8 KiB
C++
82 lines
1.8 KiB
C++
/*
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* Copyright 2003-2017 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_EPOLL_FD_HXX
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#define MPD_EPOLL_FD_HXX
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#include <assert.h>
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#include <sys/epoll.h>
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#include <unistd.h>
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#include <stdint.h>
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#include "check.h"
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struct epoll_event;
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/**
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* A class that wraps Linux epoll.
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*
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* Errors in the constructor are fatal.
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*/
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class EPollFD {
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const int fd;
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public:
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EPollFD();
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~EPollFD() {
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assert(fd >= 0);
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::close(fd);
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}
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EPollFD(const EPollFD &other) = delete;
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EPollFD &operator=(const EPollFD &other) = delete;
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int Wait(epoll_event *events, int maxevents, int timeout) {
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return ::epoll_wait(fd, events, maxevents, timeout);
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}
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bool Control(int op, int _fd, epoll_event *event) {
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return ::epoll_ctl(fd, op, _fd, event) >= 0;
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}
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bool Add(int _fd, uint32_t events, void *ptr) {
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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) {
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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) {
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return Control(EPOLL_CTL_DEL, _fd, nullptr);
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}
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};
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#endif
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