2022-02-10 11:01:52 +01:00
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// This file is originally from Trantor - KQueue.h
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// Copyright (c) 2016-2021, Tao An. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of Tao An nor the names of other contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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2022-02-10 01:24:36 +01:00
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#pragma once
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#include "core/loops/event_loop.h"
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#include "core/loops/poller.h"
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#if (defined(__unix__) && !defined(__linux__)) || \
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(defined(__APPLE__) && defined(__MACH__))
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#define USE_KQUEUE
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#include <memory>
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#include <unordered_map>
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#include <vector>
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using EventList = std::vector<struct kevent>;
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#endif
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namespace trantor {
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class Channel;
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class KQueue : public Poller {
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public:
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explicit KQueue(EventLoop *loop);
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virtual ~KQueue();
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virtual void poll(int timeoutMs, ChannelList *activeChannels) override;
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virtual void updateChannel(Channel *channel) override;
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virtual void removeChannel(Channel *channel) override;
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virtual void resetAfterFork() override;
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private:
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#ifdef USE_KQUEUE
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static const int kInitEventListSize = 16;
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int kqfd_;
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EventList events_;
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using ChannelMap = std::unordered_map<int, std::pair<int, Channel *> >;
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ChannelMap channels_;
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void fillActiveChannels(int numEvents, ChannelList *activeChannels) const;
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void update(Channel *channel);
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#endif
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};
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} // namespace trantor
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