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