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/*
* Copyright 2013-2018 Max Kellermann <max.kellermann@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef EPOLL_FD_HXX
#define EPOLL_FD_HXX
#include "UniqueFileDescriptor.hxx"
#include <sys/epoll.h>
#include <stdint.h>
struct epoll_event;
/**
* A class that wraps Linux epoll.
*/
class EpollFD {
UniqueFileDescriptor fd;
public:
/**
* Throws on error.
*/
EpollFD();
EpollFD(EpollFD &&) = default;
EpollFD &operator=(EpollFD &&) = default;
int Wait(epoll_event *events, int maxevents, int timeout) noexcept {
return ::epoll_wait(fd.Get(), events, maxevents, timeout);
}
bool Control(int op, int _fd, epoll_event *event) noexcept {
return ::epoll_ctl(fd.Get(), 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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