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48 lines
1004 B
C++
48 lines
1004 B
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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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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