ardupilot/libraries/AP_HAL_Linux/Poller.h

64 lines
1.5 KiB
C++

/// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
/*
* Copyright (C) 2016 Intel Corporation. All rights reserved.
*
* This file 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 3 of the License, or
* (at your option) any later version.
*
* This file 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, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <sys/epoll.h>
#include <unistd.h>
#include "AP_HAL/utility/RingBuffer.h"
#include "Semaphores.h"
namespace Linux {
class Poller;
class Pollable {
friend class Poller;
public:
Pollable(int fd) : _fd(fd) { }
Pollable() : _fd(-1) { }
virtual ~Pollable();
int get_fd() const { return _fd; }
virtual void on_can_read() { }
virtual void on_can_write() { }
virtual void on_error() { }
virtual void on_hang_up() { }
protected:
int _fd;
};
class Poller {
public:
Poller() : _epfd(epoll_create1(EPOLL_CLOEXEC)) { }
~Poller() { close(_epfd); }
bool register_pollable(Pollable*, uint32_t events);
void unregister_pollable(const Pollable*);
int poll() const;
private:
int _epfd;
};
}