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128 lines
3.6 KiB
C++
128 lines
3.6 KiB
C++
/*
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Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
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This file is part of libzmq, the ZeroMQ core engine in C++.
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libzmq is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License (LGPL) as published
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by the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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As a special exception, the Contributors give you permission to link
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this library with independent modules to produce an executable,
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regardless of the license terms of these independent modules, and to
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copy and distribute the resulting executable under terms of your choice,
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provided that you also meet, for each linked independent module, the
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terms and conditions of the license of that module. An independent
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module is a module which is not derived from or based on this library.
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If you modify this library, you must extend this exception to your
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version of the library.
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libzmq is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ZMQ_KQUEUE_HPP_INCLUDED__
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#define __ZMQ_KQUEUE_HPP_INCLUDED__
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// poller.hpp decides which polling mechanism to use.
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#include "poller.hpp"
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#if defined ZMQ_USE_KQUEUE
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#include <vector>
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#include <unistd.h>
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#include "ctx.hpp"
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#include "fd.hpp"
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#include "thread.hpp"
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#include "poller_base.hpp"
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namespace zmq
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{
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struct i_poll_events;
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// Implements socket polling mechanism using the BSD-specific
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// kqueue interface.
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class kqueue_t : public poller_base_t
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{
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public:
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typedef void* handle_t;
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kqueue_t (const ctx_t &ctx_);
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~kqueue_t ();
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// "poller" concept.
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handle_t add_fd (fd_t fd_, zmq::i_poll_events *events_);
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void rm_fd (handle_t handle_);
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void set_pollin (handle_t handle_);
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void reset_pollin (handle_t handle_);
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void set_pollout (handle_t handle_);
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void reset_pollout (handle_t handle_);
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void start ();
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void stop ();
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static int max_fds ();
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private:
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// Main worker thread routine.
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static void worker_routine (void *arg_);
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// Main event loop.
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void loop ();
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// Reference to ZMQ context.
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const ctx_t &ctx;
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// File descriptor referring to the kernel event queue.
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fd_t kqueue_fd;
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// Adds the event to the kqueue.
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void kevent_add (fd_t fd_, short filter_, void *udata_);
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// Deletes the event from the kqueue.
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void kevent_delete (fd_t fd_, short filter_);
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struct poll_entry_t
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{
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fd_t fd;
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bool flag_pollin;
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bool flag_pollout;
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zmq::i_poll_events *reactor;
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};
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// List of retired event sources.
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typedef std::vector <poll_entry_t*> retired_t;
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retired_t retired;
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// If true, thread is in the process of shutting down.
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bool stopping;
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// Handle of the physical thread doing the I/O work.
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thread_t worker;
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kqueue_t (const kqueue_t&);
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const kqueue_t &operator = (const kqueue_t&);
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#ifdef HAVE_FORK
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// the process that created this context. Used to detect forking.
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pid_t pid;
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#endif
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};
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typedef kqueue_t poller_t;
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}
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#endif
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#endif
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