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f716b571ba
Till now wrappers for all the polling mechanisms available on the given platform were compiled, although only one of them was used. This patch compiles just the used one. This can make libzmq binary more concise. Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
124 lines
3.0 KiB
C++
124 lines
3.0 KiB
C++
/*
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Copyright (c) 2007-2011 iMatix Corporation
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Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file
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This file is part of 0MQ.
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0MQ 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 as published by
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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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0MQ 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 Lesser General Public 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_SELECT_HPP_INCLUDED__
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#define __ZMQ_SELECT_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_SELECT
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#include "platform.hpp"
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#include <stddef.h>
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#include <vector>
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#ifdef ZMQ_HAVE_WINDOWS
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#include "winsock2.h"
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#elif defined ZMQ_HAVE_OPENVMS
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#include <sys/types.h>
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#include <sys/time.h>
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#else
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#include <sys/select.h>
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#endif
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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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// Implements socket polling mechanism using POSIX.1-2001 select()
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// function.
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class select_t : public poller_base_t
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{
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public:
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typedef fd_t handle_t;
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select_t ();
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~select_t ();
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// "poller" concept.
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handle_t add_fd (fd_t fd_, struct 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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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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struct fd_entry_t
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{
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fd_t fd;
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struct i_poll_events *events;
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};
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// Checks if an fd_entry_t is retired.
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static bool is_retired_fd (const fd_entry_t &entry);
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// Set of file descriptors that are used to retreive
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// information for fd_set.
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typedef std::vector <fd_entry_t> fd_set_t;
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fd_set_t fds;
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fd_set source_set_in;
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fd_set source_set_out;
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fd_set source_set_err;
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fd_set readfds;
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fd_set writefds;
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fd_set exceptfds;
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// Maximum file descriptor.
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fd_t maxfd;
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// If true, at least one file descriptor has retired.
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bool retired;
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// If true, thread is 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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select_t (const select_t&);
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const select_t &operator = (const select_t&);
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};
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typedef select_t poller_t;
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}
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#endif
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#endif
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