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Copyright (c) 2007-2010 iMatix Corporation
This file is part of 0MQ.
0MQ is free software; you can redistribute it and/or modify it under
the terms of the Lesser GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
0MQ is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
Lesser GNU General Public License for more details.
You should have received a copy of the Lesser GNU General Public License
along with this program. If not, see <>.
#include <new>
#include "../include/zmq.h"
#include "io_thread.hpp"
#include "command.hpp"
#include "platform.hpp"
#include "err.hpp"
#include "command.hpp"
#include "dispatcher.hpp"
#include "simple_semaphore.hpp"
zmq::io_thread_t::io_thread_t (dispatcher_t *dispatcher_, int thread_slot_,
int flags_) :
object_t (dispatcher_, thread_slot_)
poller = new (std::nothrow) poller_t;
zmq_assert (poller);
signaler_handle = poller->add_fd (signaler.get_fd (), this);
poller->set_pollin (signaler_handle);
zmq::io_thread_t::~io_thread_t ()
delete poller;
void zmq::io_thread_t::start ()
// Start the underlying I/O thread.
poller->start ();
void zmq::io_thread_t::stop ()
send_stop ();
zmq::i_signaler *zmq::io_thread_t::get_signaler ()
return &signaler;
int zmq::io_thread_t::get_load ()
return poller->get_load ();
void zmq::io_thread_t::in_event ()
// Find out which threads are sending us commands.
uint64_t signals = signaler.check ();
zmq_assert (signals);
// Iterate through all the threads in the process and find out
// which of them sent us commands.
int slot_count = thread_slot_count ();
for (int source_thread_slot = 0;
source_thread_slot != slot_count; source_thread_slot++) {
if (signals & (uint64_t (1) << source_thread_slot)) {
// Read all the commands from particular thread.
command_t cmd;
while (dispatcher->read (source_thread_slot, thread_slot, &cmd))
cmd.destination->process_command (cmd);
void zmq::io_thread_t::out_event ()
// We are never polling for POLLOUT here. This function is never called.
zmq_assert (false);
void zmq::io_thread_t::timer_event ()
// No timers here. This function is never called.
zmq_assert (false);
zmq::poller_t *zmq::io_thread_t::get_poller ()
zmq_assert (poller);
return poller;
void zmq::io_thread_t::process_stop ()
poller->rm_fd (signaler_handle);
poller->stop ();
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