Initial ZMQ bindings.

vendor/ZMQ/src/io_thread.cpp

@@ -0,0 +1,121 @@
+/*
+    Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
+
+    This file is part of libzmq, the ZeroMQ core engine in C++.
+
+    libzmq is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License (LGPL) as published
+    by the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    As a special exception, the Contributors give you permission to link
+    this library with independent modules to produce an executable,
+    regardless of the license terms of these independent modules, and to
+    copy and distribute the resulting executable under terms of your choice,
+    provided that you also meet, for each linked independent module, the
+    terms and conditions of the license of that module. An independent
+    module is a module which is not derived from or based on this library.
+    If you modify this library, you must extend this exception to your
+    version of the library.
+
+    libzmq is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+    License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "precompiled.hpp"
+
+#include <new>
+
+#include "macros.hpp"
+#include "io_thread.hpp"
+#include "err.hpp"
+#include "ctx.hpp"
+
+zmq::io_thread_t::io_thread_t (ctx_t *ctx_, uint32_t tid_) :
+    object_t (ctx_, tid_),
+    _mailbox_handle (static_cast<poller_t::handle_t> (NULL))
+{
+    _poller = new (std::nothrow) poller_t (*ctx_);
+    alloc_assert (_poller);
+
+    if (_mailbox.get_fd () != retired_fd) {
+        _mailbox_handle = _poller->add_fd (_mailbox.get_fd (), this);
+        _poller->set_pollin (_mailbox_handle);
+    }
+}
+
+zmq::io_thread_t::~io_thread_t ()
+{
+    LIBZMQ_DELETE (_poller);
+}
+
+void zmq::io_thread_t::start ()
+{
+    char name[16] = "";
+    snprintf (name, sizeof (name), "IO/%u",
+              get_tid () - zmq::ctx_t::reaper_tid - 1);
+    //  Start the underlying I/O thread.
+    _poller->start (name);
+}
+
+void zmq::io_thread_t::stop ()
+{
+    send_stop ();
+}
+
+zmq::mailbox_t *zmq::io_thread_t::get_mailbox ()
+{
+    return &_mailbox;
+}
+
+int zmq::io_thread_t::get_load () const
+{
+    return _poller->get_load ();
+}
+
+void zmq::io_thread_t::in_event ()
+{
+    //  TODO: Do we want to limit number of commands I/O thread can
+    //  process in a single go?
+
+    command_t cmd;
+    int rc = _mailbox.recv (&cmd, 0);
+
+    while (rc == 0 || errno == EINTR) {
+        if (rc == 0)
+            cmd.destination->process_command (cmd);
+        rc = _mailbox.recv (&cmd, 0);
+    }
+
+    errno_assert (rc != 0 && errno == EAGAIN);
+}
+
+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 (int)
+{
+    //  No timers here. This function is never called.
+    zmq_assert (false);
+}
+
+zmq::poller_t *zmq::io_thread_t::get_poller () const
+{
+    zmq_assert (_poller);
+    return _poller;
+}
+
+void zmq::io_thread_t::process_stop ()
+{
+    zmq_assert (_mailbox_handle);
+    _poller->rm_fd (_mailbox_handle);
+    _poller->stop ();
+}