port zpoller to libzmq as zmq_poller

src/socket_poller.hpp

@@ -0,0 +1,104 @@
+/*
+    Copyright (c) 2007-2015 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_SOCKET_POLLER_HPP_INCLUDED__
+#define __ZMQ_SOCKET_POLLER_HPP_INCLUDED__
+
+#include <vector>
+#include <algorithm>
+
+#include "../include/zmq.h"
+
+namespace zmq
+{
+
+    class socket_poller_t
+    {
+    public:
+        socket_poller_t ();
+        ~socket_poller_t ();
+
+        typedef struct event_t
+        {
+            void *socket;
+#if defined _WIN32
+            SOCKET fd;
+#else
+            int fd;
+#endif
+            void *user_data; 
+        } event_t;
+
+        int add_socket (void *socket, void *user_data);
+        int remove_socket (void *socket);
+#if defined _WIN32
+        int add_fd (SOCKET fd, void *user_data);
+        int remove_fd (SOCKET fd);
+#else
+        int add_fd (int fd, void *user_data);
+        int remove_fd (int fd);
+#endif
+
+        int wait (event_t *event, long timeout);
+
+        //  Return false if object is not a socket.
+        bool check_tag ();
+
+    private:
+        void rebuild ();
+
+        //  Used to check whether the object is a socket_poller.
+        uint32_t tag;
+
+        //  Pollfd used for thread safe sockets polling
+        void *pollfd;
+
+        //  List of sockets
+        typedef std::vector <event_t> events_t;
+        events_t events;
+
+        //  Current zmq_poll set
+        zmq_pollitem_t *poll_set;
+
+        //  Matching set to events
+        event_t *poll_events;
+
+        //  Size of the pollset
+        int poll_size;
+
+        //  Does the pollset needs rebuilding?
+        bool need_rebuild;
+        
+        socket_poller_t (const socket_poller_t&);
+        const socket_poller_t &operator = (const socket_poller_t&);
+    };
+
+}
+
+#endif