64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
/*
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* Copyright 2003-2021 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 EVENT_POLL_BACKEND_HXX
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#define EVENT_POLL_BACKEND_HXX
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#include "PollResultGeneric.hxx"
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#include <cstddef>
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#include <vector>
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#include <unordered_map>
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#include <sys/poll.h>
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class PollBackend
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{
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struct Item
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{
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std::size_t index;
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void *obj;
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constexpr Item(std::size_t _index, void *_obj) noexcept
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:index(_index), obj(_obj) {}
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Item(const Item &) = delete;
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Item &operator=(const Item &) = delete;
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};
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std::vector<pollfd> poll_events;
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std::unordered_map<int, Item> items;
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PollBackend(PollBackend &) = delete;
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PollBackend &operator=(PollBackend &) = delete;
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public:
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PollBackend() noexcept;
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~PollBackend() noexcept;
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PollResultGeneric ReadEvents(int timeout_ms) noexcept;
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bool Add(int fd, unsigned events, void *obj) noexcept;
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bool Modify(int fd, unsigned events, void *obj) noexcept;
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bool Remove(int fd) noexcept;
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bool Abandon(int fd) noexcept {
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return Remove(fd);
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}
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};
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#endif
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