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author | Remko Tronçon <git@el-tramo.be> | 2010-11-24 20:33:19 (GMT) |
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committer | Remko Tronçon <git@el-tramo.be> | 2010-11-24 20:35:17 (GMT) |
commit | 332d60c56dfaa11fdd135088279d15cd5983b3d4 (patch) | |
tree | dd77717a4e1732da929d5ff8a0471fa3f005e201 /3rdParty/Boost/src/boost/asio/detail/impl/select_reactor.ipp | |
parent | 90c44a10fec26d2a0935b2d62e82b6a5be028373 (diff) | |
download | swift-contrib-332d60c56dfaa11fdd135088279d15cd5983b3d4.zip swift-contrib-332d60c56dfaa11fdd135088279d15cd5983b3d4.tar.bz2 |
Upgraded Boost to 1.45.0.
Diffstat (limited to '3rdParty/Boost/src/boost/asio/detail/impl/select_reactor.ipp')
-rw-r--r-- | 3rdParty/Boost/src/boost/asio/detail/impl/select_reactor.ipp | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/asio/detail/impl/select_reactor.ipp b/3rdParty/Boost/src/boost/asio/detail/impl/select_reactor.ipp new file mode 100644 index 0000000..af6e6c1 --- /dev/null +++ b/3rdParty/Boost/src/boost/asio/detail/impl/select_reactor.ipp @@ -0,0 +1,275 @@ +// +// detail/impl/select_reactor.ipp +// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// +// Copyright (c) 2003-2010 Christopher M. Kohlhoff (chris at kohlhoff dot com) +// +// Distributed under the Boost Software License, Version 1.0. (See accompanying +// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) +// + +#ifndef BOOST_ASIO_DETAIL_IMPL_SELECT_REACTOR_IPP +#define BOOST_ASIO_DETAIL_IMPL_SELECT_REACTOR_IPP + +#if defined(_MSC_VER) && (_MSC_VER >= 1200) +# pragma once +#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) + +#include <boost/asio/detail/config.hpp> + +#if defined(BOOST_ASIO_HAS_IOCP) \ + || (!defined(BOOST_ASIO_HAS_DEV_POLL) \ + && !defined(BOOST_ASIO_HAS_EPOLL) \ + && !defined(BOOST_ASIO_HAS_KQUEUE)) + +#include <boost/asio/detail/bind_handler.hpp> +#include <boost/asio/detail/fd_set_adapter.hpp> +#include <boost/asio/detail/select_reactor.hpp> +#include <boost/asio/detail/signal_blocker.hpp> +#include <boost/asio/detail/socket_ops.hpp> + +#include <boost/asio/detail/push_options.hpp> + +namespace boost { +namespace asio { +namespace detail { + +select_reactor::select_reactor(boost::asio::io_service& io_service) + : boost::asio::detail::service_base<select_reactor>(io_service), + io_service_(use_service<io_service_impl>(io_service)), + mutex_(), + interrupter_(), +#if defined(BOOST_ASIO_HAS_IOCP) + stop_thread_(false), + thread_(0), +#endif // defined(BOOST_ASIO_HAS_IOCP) + shutdown_(false) +{ +#if defined(BOOST_ASIO_HAS_IOCP) + boost::asio::detail::signal_blocker sb; + thread_ = new boost::asio::detail::thread( + bind_handler(&select_reactor::call_run_thread, this)); +#endif // defined(BOOST_ASIO_HAS_IOCP) +} + +select_reactor::~select_reactor() +{ + shutdown_service(); +} + +void select_reactor::shutdown_service() +{ + boost::asio::detail::mutex::scoped_lock lock(mutex_); + shutdown_ = true; +#if defined(BOOST_ASIO_HAS_IOCP) + stop_thread_ = true; +#endif // defined(BOOST_ASIO_HAS_IOCP) + lock.unlock(); + +#if defined(BOOST_ASIO_HAS_IOCP) + if (thread_) + { + interrupter_.interrupt(); + thread_->join(); + delete thread_; + thread_ = 0; + } +#endif // defined(BOOST_ASIO_HAS_IOCP) + + op_queue<operation> ops; + + for (int i = 0; i < max_ops; ++i) + op_queue_[i].get_all_operations(ops); + + timer_queues_.get_all_timers(ops); +} + +void select_reactor::init_task() +{ + io_service_.init_task(); +} + +int select_reactor::register_descriptor(socket_type, + select_reactor::per_descriptor_data&) +{ + return 0; +} + +void select_reactor::start_op(int op_type, socket_type descriptor, + select_reactor::per_descriptor_data&, reactor_op* op, bool) +{ + boost::asio::detail::mutex::scoped_lock lock(mutex_); + + if (shutdown_) + { + post_immediate_completion(op); + return; + } + + bool first = op_queue_[op_type].enqueue_operation(descriptor, op); + io_service_.work_started(); + if (first) + interrupter_.interrupt(); +} + +void select_reactor::cancel_ops(socket_type descriptor, + select_reactor::per_descriptor_data&) +{ + boost::asio::detail::mutex::scoped_lock lock(mutex_); + cancel_ops_unlocked(descriptor, boost::asio::error::operation_aborted); +} + +void select_reactor::close_descriptor(socket_type descriptor, + select_reactor::per_descriptor_data&) +{ + boost::asio::detail::mutex::scoped_lock lock(mutex_); + cancel_ops_unlocked(descriptor, boost::asio::error::operation_aborted); +} + +void select_reactor::run(bool block, op_queue<operation>& ops) +{ + boost::asio::detail::mutex::scoped_lock lock(mutex_); + +#if defined(BOOST_ASIO_HAS_IOCP) + // Check if the thread is supposed to stop. + if (stop_thread_) + return; +#endif // defined(BOOST_ASIO_HAS_IOCP) + + // Set up the descriptor sets. + fd_set_adapter fds[max_select_ops]; + fds[read_op].set(interrupter_.read_descriptor()); + socket_type max_fd = 0; + bool have_work_to_do = !timer_queues_.all_empty(); + for (int i = 0; i < max_select_ops; ++i) + { + have_work_to_do = have_work_to_do || !op_queue_[i].empty(); + op_queue_[i].get_descriptors(fds[i], ops); + if (fds[i].max_descriptor() > max_fd) + max_fd = fds[i].max_descriptor(); + } + +#if defined(BOOST_WINDOWS) || defined(__CYGWIN__) + // Connection operations on Windows use both except and write fd_sets. + have_work_to_do = have_work_to_do || !op_queue_[connect_op].empty(); + op_queue_[connect_op].get_descriptors(fds[write_op], ops); + if (fds[write_op].max_descriptor() > max_fd) + max_fd = fds[write_op].max_descriptor(); + op_queue_[connect_op].get_descriptors(fds[except_op], ops); + if (fds[except_op].max_descriptor() > max_fd) + max_fd = fds[except_op].max_descriptor(); +#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__) + + // We can return immediately if there's no work to do and the reactor is + // not supposed to block. + if (!block && !have_work_to_do) + return; + + // Determine how long to block while waiting for events. + timeval tv_buf = { 0, 0 }; + timeval* tv = block ? get_timeout(tv_buf) : &tv_buf; + + lock.unlock(); + + // Block on the select call until descriptors become ready. + boost::system::error_code ec; + int retval = socket_ops::select(static_cast<int>(max_fd + 1), + fds[read_op], fds[write_op], fds[except_op], tv, ec); + + // Reset the interrupter. + if (retval > 0 && fds[read_op].is_set(interrupter_.read_descriptor())) + interrupter_.reset(); + + lock.lock(); + + // Dispatch all ready operations. + if (retval > 0) + { +#if defined(BOOST_WINDOWS) || defined(__CYGWIN__) + // Connection operations on Windows use both except and write fd_sets. + op_queue_[connect_op].perform_operations_for_descriptors( + fds[except_op], ops); + op_queue_[connect_op].perform_operations_for_descriptors( + fds[write_op], ops); +#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__) + + // Exception operations must be processed first to ensure that any + // out-of-band data is read before normal data. + for (int i = max_select_ops - 1; i >= 0; --i) + op_queue_[i].perform_operations_for_descriptors(fds[i], ops); + } + timer_queues_.get_ready_timers(ops); +} + +void select_reactor::interrupt() +{ + interrupter_.interrupt(); +} + +#if defined(BOOST_ASIO_HAS_IOCP) +void select_reactor::run_thread() +{ + boost::asio::detail::mutex::scoped_lock lock(mutex_); + while (!stop_thread_) + { + lock.unlock(); + op_queue<operation> ops; + run(true, ops); + io_service_.post_deferred_completions(ops); + lock.lock(); + } +} + +void select_reactor::call_run_thread(select_reactor* reactor) +{ + reactor->run_thread(); +} +#endif // defined(BOOST_ASIO_HAS_IOCP) + +void select_reactor::do_add_timer_queue(timer_queue_base& queue) +{ + mutex::scoped_lock lock(mutex_); + timer_queues_.insert(&queue); +} + +void select_reactor::do_remove_timer_queue(timer_queue_base& queue) +{ + mutex::scoped_lock lock(mutex_); + timer_queues_.erase(&queue); +} + +timeval* select_reactor::get_timeout(timeval& tv) +{ + // By default we will wait no longer than 5 minutes. This will ensure that + // any changes to the system clock are detected after no longer than this. + long usec = timer_queues_.wait_duration_usec(5 * 60 * 1000 * 1000); + tv.tv_sec = usec / 1000000; + tv.tv_usec = usec % 1000000; + return &tv; +} + +void select_reactor::cancel_ops_unlocked(socket_type descriptor, + const boost::system::error_code& ec) +{ + bool need_interrupt = false; + op_queue<operation> ops; + for (int i = 0; i < max_ops; ++i) + need_interrupt = op_queue_[i].cancel_operations( + descriptor, ops, ec) || need_interrupt; + io_service_.post_deferred_completions(ops); + if (need_interrupt) + interrupter_.interrupt(); +} + +} // namespace detail +} // namespace asio +} // namespace boost + +#include <boost/asio/detail/pop_options.hpp> + +#endif // defined(BOOST_ASIO_HAS_IOCP) + // || (!defined(BOOST_ASIO_HAS_DEV_POLL) + // && !defined(BOOST_ASIO_HAS_EPOLL) + // && !defined(BOOST_ASIO_HAS_KQUEUE)) + +#endif // BOOST_ASIO_DETAIL_IMPL_SELECT_REACTOR_IPP |