Merge commit 'e988fee1679536137b87d10e939eff5c1f27c8ab' as 'libs/libzmq'

libs/libzmq/src/devpoll.hpp

@@ -0,0 +1,101 @@
+/*
+    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/>.
+*/
+
+#ifndef __ZMQ_DEVPOLL_HPP_INCLUDED__
+#define __ZMQ_DEVPOLL_HPP_INCLUDED__
+
+//  poller.hpp decides which polling mechanism to use.
+#include "poller.hpp"
+#if defined ZMQ_IOTHREAD_POLLER_USE_DEVPOLL
+
+#include <vector>
+
+#include "ctx.hpp"
+#include "fd.hpp"
+#include "thread.hpp"
+#include "poller_base.hpp"
+
+namespace zmq
+{
+struct i_poll_events;
+
+//  Implements socket polling mechanism using the "/dev/poll" interface.
+
+class devpoll_t ZMQ_FINAL : public worker_poller_base_t
+{
+  public:
+    typedef fd_t handle_t;
+
+    devpoll_t (const thread_ctx_t &ctx_);
+    ~devpoll_t () ZMQ_FINAL;
+
+    //  "poller" concept.
+    handle_t add_fd (fd_t fd_, zmq::i_poll_events *events_);
+    void rm_fd (handle_t handle_);
+    void set_pollin (handle_t handle_);
+    void reset_pollin (handle_t handle_);
+    void set_pollout (handle_t handle_);
+    void reset_pollout (handle_t handle_);
+    void stop ();
+
+    static int max_fds ();
+
+  private:
+    //  Main event loop.
+    void loop () ZMQ_FINAL;
+
+    //  File descriptor referring to "/dev/poll" pseudo-device.
+    fd_t devpoll_fd;
+
+    struct fd_entry_t
+    {
+        short events;
+        zmq::i_poll_events *reactor;
+        bool valid;
+        bool accepted;
+    };
+
+    typedef std::vector<fd_entry_t> fd_table_t;
+    fd_table_t fd_table;
+
+    typedef std::vector<fd_t> pending_list_t;
+    pending_list_t pending_list;
+
+    //  Pollset manipulation function.
+    void devpoll_ctl (fd_t fd_, short events_);
+
+    ZMQ_NON_COPYABLE_NOR_MOVABLE (devpoll_t)
+};
+
+typedef devpoll_t poller_t;
+}
+
+#endif
+
+#endif