diff options
author | Martin Sustrik <sustrik@fastmq.commkdir> | 2009-07-29 12:07:54 +0200 |
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committer | Martin Sustrik <sustrik@fastmq.commkdir> | 2009-07-29 12:07:54 +0200 |
commit | 4ed70a930202b103e7e80b8dc925e0aaa4622595 (patch) | |
tree | aeed881ce17629f81b7c90f7d675aac8ecf69d4f /src/poll.hpp |
initial commit
Diffstat (limited to 'src/poll.hpp')
-rw-r--r-- | src/poll.hpp | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/src/poll.hpp b/src/poll.hpp new file mode 100644 index 0000000..65095f7 --- /dev/null +++ b/src/poll.hpp @@ -0,0 +1,112 @@ +/* + Copyright (c) 2007-2009 FastMQ Inc. + + 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 __ZS_POLL_HPP_INCLUDED__ +#define __ZS_POLL_HPP_INCLUDED__ + +#include "platform.hpp" + +#if defined ZS_HAVE_LINUX || defined ZS_HAVE_FREEBSD ||\ + defined ZS_HAVE_OPENBSD || defined ZS_HAVE_SOLARIS ||\ + defined ZS_HAVE_OSX || defined ZS_HAVE_QNXNTO ||\ + defined ZS_HAVE_HPUX || defined ZS_HAVE_AIX + +#include <poll.h> +#include <stddef.h> +#include <vector> + +#include "i_poller.hpp" +#include "fd.hpp" +#include "thread.hpp" +#include "atomic_counter.hpp" + +namespace zs +{ + + // Implements socket polling mechanism using the POSIX.1-2001 + // poll() system call. + + class poll_t : public i_poller + { + public: + + poll_t (); + virtual ~poll_t () {} + + // i_poller implementation. + handle_t add_fd (fd_t fd_, 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 (i_poll_events *events_); + void cancel_timer (i_poll_events *events_); + int get_load (); + void start (); + void stop (); + void join (); + + 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 |