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9da84a5239
For historical reasons queue to transfer commands between threads was called 'signaler'. Given that it was used to pass commands rather than signals it was renamed to 'mailbox', see Erlang mailboxes. Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
109 lines
2.4 KiB
C++
109 lines
2.4 KiB
C++
/*
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Copyright (c) 2007-2010 iMatix Corporation
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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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#include <new>
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#include "../include/zmq.h"
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#include "io_thread.hpp"
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#include "platform.hpp"
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#include "err.hpp"
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#include "ctx.hpp"
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zmq::io_thread_t::io_thread_t (ctx_t *ctx_, uint32_t tid_) :
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object_t (ctx_, tid_)
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{
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poller = new (std::nothrow) poller_t;
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zmq_assert (poller);
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mailbox_handle = poller->add_fd (mailbox.get_fd (), this);
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poller->set_pollin (mailbox_handle);
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}
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zmq::io_thread_t::~io_thread_t ()
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{
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delete poller;
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}
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void zmq::io_thread_t::start ()
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{
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// Start the underlying I/O thread.
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poller->start ();
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}
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void zmq::io_thread_t::stop ()
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{
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send_stop ();
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}
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zmq::mailbox_t *zmq::io_thread_t::get_mailbox ()
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{
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return &mailbox;
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}
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int zmq::io_thread_t::get_load ()
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{
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return poller->get_load ();
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}
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void zmq::io_thread_t::in_event ()
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{
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// TODO: Do we want to limit number of commands I/O thread can
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// process in a single go?
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while (true) {
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// Get the next command. If there is none, exit.
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command_t cmd;
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int rc = mailbox.recv (&cmd, false);
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if (rc != 0 && errno == EINTR)
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continue;
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if (rc != 0 && errno == EAGAIN)
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break;
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errno_assert (rc == 0);
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// Process the command.
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cmd.destination->process_command (cmd);
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}
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}
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void zmq::io_thread_t::out_event ()
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{
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// We are never polling for POLLOUT here. This function is never called.
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zmq_assert (false);
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}
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void zmq::io_thread_t::timer_event (int id_)
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{
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// No timers here. This function is never called.
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zmq_assert (false);
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}
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zmq::poller_t *zmq::io_thread_t::get_poller ()
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{
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zmq_assert (poller);
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return poller;
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}
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void zmq::io_thread_t::process_stop ()
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{
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poller->rm_fd (mailbox_handle);
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poller->stop ();
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}
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