summaryrefslogtreecommitdiff
path: root/src/poll.hpp
diff options
context:
space:
mode:
authorMartin Lucina <martin@lucina.net>2012-01-23 08:53:19 +0100
committerMartin Lucina <martin@lucina.net>2012-01-23 08:53:19 +0100
commita15854bd92db69fcd0b4444fe1b8fe3610a7acf6 (patch)
tree1214b945d0f0033ff318de367c70525ea141ef56 /src/poll.hpp
Imported Upstream version 2.0.7.dfsgupstream/2.0.7.dfsg
Diffstat (limited to 'src/poll.hpp')
-rw-r--r--src/poll.hpp113
1 files changed, 113 insertions, 0 deletions
diff --git a/src/poll.hpp b/src/poll.hpp
new file mode 100644
index 0000000..f4ae35a
--- /dev/null
+++ b/src/poll.hpp
@@ -0,0 +1,113 @@
+/*
+ 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
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ 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 <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __ZMQ_POLL_HPP_INCLUDED__
+#define __ZMQ_POLL_HPP_INCLUDED__
+
+#include "platform.hpp"
+
+#if defined ZMQ_HAVE_LINUX || defined ZMQ_HAVE_FREEBSD ||\
+ defined ZMQ_HAVE_OPENBSD || defined ZMQ_HAVE_SOLARIS ||\
+ defined ZMQ_HAVE_OSX || defined ZMQ_HAVE_QNXNTO ||\
+ defined ZMQ_HAVE_HPUX || defined ZMQ_HAVE_AIX ||\
+ defined ZMQ_HAVE_NETBSD
+
+#include <poll.h>
+#include <stddef.h>
+#include <vector>
+
+#include "fd.hpp"
+#include "thread.hpp"
+#include "atomic_counter.hpp"
+
+namespace zmq
+{
+
+ // Implements socket polling mechanism using the POSIX.1-2001
+ // poll() system call.
+
+ class poll_t
+ {
+ public:
+
+ typedef fd_t handle_t;
+
+ poll_t ();
+ ~poll_t ();
+
+ // "poller" concept.
+ handle_t add_fd (fd_t fd_, struct 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 add_timer (struct i_poll_events *events_);
+ void cancel_timer (struct i_poll_events *events_);
+ int get_load ();
+ void start ();
+ void stop ();
+
+ private:
+
+ // Main worker thread routine.
+ static void worker_routine (void *arg_);
+
+ // Main event loop.
+ void loop ();
+
+ struct fd_entry_t
+ {
+ fd_t index;
+ struct i_poll_events *events;
+ };
+
+ // This table stores data for registered descriptors.
+ std::vector <fd_entry_t> fd_table;
+
+ // Pollset to pass to the poll function.
+ typedef std::vector <pollfd> pollset_t;
+ pollset_t pollset;
+
+ // If true, there's at least one retired event source.
+ bool retired;
+
+ // List of all the engines waiting for the timer event.
+ typedef std::vector <struct i_poll_events*> timers_t;
+ timers_t timers;
+
+ // If true, thread is in the process of shutting down.
+ bool stopping;
+
+ // Handle of the physical thread doing the I/O work.
+ thread_t worker;
+
+ // Load of the poller. Currently number of file descriptors
+ // registered with the poller.
+ atomic_counter_t load;
+
+ poll_t (const poll_t&);
+ void operator = (const poll_t&);
+ };
+
+}
+
+#endif
+
+#endif