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author | Remko Tronçon <git@el-tramo.be> | 2010-02-11 12:14:00 (GMT) |
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committer | Remko Tronçon <git@el-tramo.be> | 2010-02-11 12:14:00 (GMT) |
commit | 0efa7c32aaf21a29b42b5926cc116007056843be (patch) | |
tree | 882f663a5dd0e65694bf6077b71086dd77fd7ff8 /3rdParty/Boost/boost/asio/detail/task_io_service.hpp | |
parent | 1d20eabbc32274b491b4c2bedf73d19933d97bfd (diff) | |
download | swift-contrib-0efa7c32aaf21a29b42b5926cc116007056843be.zip swift-contrib-0efa7c32aaf21a29b42b5926cc116007056843be.tar.bz2 |
Moved some modules into separate git modules.
Diffstat (limited to '3rdParty/Boost/boost/asio/detail/task_io_service.hpp')
m--------- | 3rdParty/Boost | 0 | ||||
-rw-r--r-- | 3rdParty/Boost/boost/asio/detail/task_io_service.hpp | 438 |
2 files changed, 0 insertions, 438 deletions
diff --git a/3rdParty/Boost b/3rdParty/Boost new file mode 160000 +Subproject 3bbdbc8cf1996f23d9a366da8bac0f97be6ad79 diff --git a/3rdParty/Boost/boost/asio/detail/task_io_service.hpp b/3rdParty/Boost/boost/asio/detail/task_io_service.hpp deleted file mode 100644 index eeae6b0..0000000 --- a/3rdParty/Boost/boost/asio/detail/task_io_service.hpp +++ /dev/null @@ -1,438 +0,0 @@ -// -// task_io_service.hpp -// ~~~~~~~~~~~~~~~~~~~ -// -// Copyright (c) 2003-2008 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_TASK_IO_SERVICE_HPP -#define BOOST_ASIO_DETAIL_TASK_IO_SERVICE_HPP - -#if defined(_MSC_VER) && (_MSC_VER >= 1200) -# pragma once -#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) - -#if defined(BOOST_ASIO_ENABLE_TWO_LOCK_QUEUE) -#include <boost/asio/detail/task_io_service_2lock.hpp> -#else // defined(BOOST_ASIO_ENABLE_TWO_LOCK_QUEUE) - -#include <boost/asio/detail/push_options.hpp> - -#include <boost/asio/io_service.hpp> -#include <boost/asio/detail/call_stack.hpp> -#include <boost/asio/detail/event.hpp> -#include <boost/asio/detail/handler_alloc_helpers.hpp> -#include <boost/asio/detail/handler_invoke_helpers.hpp> -#include <boost/asio/detail/handler_queue.hpp> -#include <boost/asio/detail/mutex.hpp> -#include <boost/asio/detail/service_base.hpp> -#include <boost/asio/detail/task_io_service_fwd.hpp> - -namespace boost { -namespace asio { -namespace detail { - -template <typename Task> -class task_io_service - : public boost::asio::detail::service_base<task_io_service<Task> > -{ -public: - // Constructor. - task_io_service(boost::asio::io_service& io_service) - : boost::asio::detail::service_base<task_io_service<Task> >(io_service), - mutex_(), - task_(0), - task_interrupted_(true), - outstanding_work_(0), - stopped_(false), - shutdown_(false), - first_idle_thread_(0) - { - } - - void init(size_t /*concurrency_hint*/) - { - } - - // Destroy all user-defined handler objects owned by the service. - void shutdown_service() - { - boost::asio::detail::mutex::scoped_lock lock(mutex_); - shutdown_ = true; - lock.unlock(); - - // Destroy handler objects. - while (!handler_queue_.empty()) - { - handler_queue::handler* h = handler_queue_.front(); - handler_queue_.pop(); - if (h != &task_handler_) - h->destroy(); - } - - // Reset to initial state. - task_ = 0; - } - - // Initialise the task, if required. - void init_task() - { - boost::asio::detail::mutex::scoped_lock lock(mutex_); - if (!shutdown_ && !task_) - { - task_ = &use_service<Task>(this->get_io_service()); - handler_queue_.push(&task_handler_); - interrupt_one_idle_thread(lock); - } - } - - // Run the event loop until interrupted or no more work. - size_t run(boost::system::error_code& ec) - { - typename call_stack<task_io_service>::context ctx(this); - - idle_thread_info this_idle_thread; - this_idle_thread.next = 0; - - boost::asio::detail::mutex::scoped_lock lock(mutex_); - - size_t n = 0; - while (do_one(lock, &this_idle_thread, ec)) - if (n != (std::numeric_limits<size_t>::max)()) - ++n; - return n; - } - - // Run until interrupted or one operation is performed. - size_t run_one(boost::system::error_code& ec) - { - typename call_stack<task_io_service>::context ctx(this); - - idle_thread_info this_idle_thread; - this_idle_thread.next = 0; - - boost::asio::detail::mutex::scoped_lock lock(mutex_); - - return do_one(lock, &this_idle_thread, ec); - } - - // Poll for operations without blocking. - size_t poll(boost::system::error_code& ec) - { - typename call_stack<task_io_service>::context ctx(this); - - boost::asio::detail::mutex::scoped_lock lock(mutex_); - - size_t n = 0; - while (do_one(lock, 0, ec)) - if (n != (std::numeric_limits<size_t>::max)()) - ++n; - return n; - } - - // Poll for one operation without blocking. - size_t poll_one(boost::system::error_code& ec) - { - typename call_stack<task_io_service>::context ctx(this); - - boost::asio::detail::mutex::scoped_lock lock(mutex_); - - return do_one(lock, 0, ec); - } - - // Interrupt the event processing loop. - void stop() - { - boost::asio::detail::mutex::scoped_lock lock(mutex_); - stop_all_threads(lock); - } - - // Reset in preparation for a subsequent run invocation. - void reset() - { - boost::asio::detail::mutex::scoped_lock lock(mutex_); - stopped_ = false; - } - - // Notify that some work has started. - void work_started() - { - boost::asio::detail::mutex::scoped_lock lock(mutex_); - ++outstanding_work_; - } - - // Notify that some work has finished. - void work_finished() - { - boost::asio::detail::mutex::scoped_lock lock(mutex_); - if (--outstanding_work_ == 0) - stop_all_threads(lock); - } - - // Request invocation of the given handler. - template <typename Handler> - void dispatch(Handler handler) - { - if (call_stack<task_io_service>::contains(this)) - boost_asio_handler_invoke_helpers::invoke(handler, &handler); - else - post(handler); - } - - // Request invocation of the given handler and return immediately. - template <typename Handler> - void post(Handler handler) - { - // Allocate and construct an operation to wrap the handler. - handler_queue::scoped_ptr ptr(handler_queue::wrap(handler)); - - boost::asio::detail::mutex::scoped_lock lock(mutex_); - - // If the service has been shut down we silently discard the handler. - if (shutdown_) - return; - - // Add the handler to the end of the queue. - handler_queue_.push(ptr.get()); - ptr.release(); - - // An undelivered handler is treated as unfinished work. - ++outstanding_work_; - - // Wake up a thread to execute the handler. - if (!interrupt_one_idle_thread(lock)) - { - if (!task_interrupted_ && task_) - { - task_interrupted_ = true; - task_->interrupt(); - } - } - } - -private: - struct idle_thread_info; - - size_t do_one(boost::asio::detail::mutex::scoped_lock& lock, - idle_thread_info* this_idle_thread, boost::system::error_code& ec) - { - if (outstanding_work_ == 0 && !stopped_) - { - stop_all_threads(lock); - ec = boost::system::error_code(); - return 0; - } - - bool polling = !this_idle_thread; - bool task_has_run = false; - while (!stopped_) - { - if (!handler_queue_.empty()) - { - // Prepare to execute first handler from queue. - handler_queue::handler* h = handler_queue_.front(); - handler_queue_.pop(); - - if (h == &task_handler_) - { - bool more_handlers = (!handler_queue_.empty()); - task_interrupted_ = more_handlers || polling; - - // If the task has already run and we're polling then we're done. - if (task_has_run && polling) - { - task_interrupted_ = true; - handler_queue_.push(&task_handler_); - ec = boost::system::error_code(); - return 0; - } - task_has_run = true; - - lock.unlock(); - task_cleanup c(lock, *this); - - // Run the task. May throw an exception. Only block if the handler - // queue is empty and we have an idle_thread_info object, otherwise - // we want to return as soon as possible. - task_->run(!more_handlers && !polling); - } - else - { - lock.unlock(); - handler_cleanup c(lock, *this); - - // Invoke the handler. May throw an exception. - h->invoke(); // invoke() deletes the handler object - - ec = boost::system::error_code(); - return 1; - } - } - else if (this_idle_thread) - { - // Nothing to run right now, so just wait for work to do. - this_idle_thread->next = first_idle_thread_; - first_idle_thread_ = this_idle_thread; - this_idle_thread->wakeup_event.clear(lock); - this_idle_thread->wakeup_event.wait(lock); - } - else - { - ec = boost::system::error_code(); - return 0; - } - } - - ec = boost::system::error_code(); - return 0; - } - - // Stop the task and all idle threads. - void stop_all_threads( - boost::asio::detail::mutex::scoped_lock& lock) - { - stopped_ = true; - interrupt_all_idle_threads(lock); - if (!task_interrupted_ && task_) - { - task_interrupted_ = true; - task_->interrupt(); - } - } - - // Interrupt a single idle thread. Returns true if a thread was interrupted, - // false if no running thread could be found to interrupt. - bool interrupt_one_idle_thread( - boost::asio::detail::mutex::scoped_lock& lock) - { - if (first_idle_thread_) - { - idle_thread_info* idle_thread = first_idle_thread_; - first_idle_thread_ = idle_thread->next; - idle_thread->next = 0; - idle_thread->wakeup_event.signal(lock); - return true; - } - return false; - } - - // Interrupt all idle threads. - void interrupt_all_idle_threads( - boost::asio::detail::mutex::scoped_lock& lock) - { - while (first_idle_thread_) - { - idle_thread_info* idle_thread = first_idle_thread_; - first_idle_thread_ = idle_thread->next; - idle_thread->next = 0; - idle_thread->wakeup_event.signal(lock); - } - } - - // Helper class to perform task-related operations on block exit. - class task_cleanup; - friend class task_cleanup; - class task_cleanup - { - public: - task_cleanup(boost::asio::detail::mutex::scoped_lock& lock, - task_io_service& task_io_svc) - : lock_(lock), - task_io_service_(task_io_svc) - { - } - - ~task_cleanup() - { - // Reinsert the task at the end of the handler queue. - lock_.lock(); - task_io_service_.task_interrupted_ = true; - task_io_service_.handler_queue_.push(&task_io_service_.task_handler_); - } - - private: - boost::asio::detail::mutex::scoped_lock& lock_; - task_io_service& task_io_service_; - }; - - // Helper class to perform handler-related operations on block exit. - class handler_cleanup; - friend class handler_cleanup; - class handler_cleanup - { - public: - handler_cleanup(boost::asio::detail::mutex::scoped_lock& lock, - task_io_service& task_io_svc) - : lock_(lock), - task_io_service_(task_io_svc) - { - } - - ~handler_cleanup() - { - lock_.lock(); - if (--task_io_service_.outstanding_work_ == 0) - task_io_service_.stop_all_threads(lock_); - } - - private: - boost::asio::detail::mutex::scoped_lock& lock_; - task_io_service& task_io_service_; - }; - - // Mutex to protect access to internal data. - boost::asio::detail::mutex mutex_; - - // The task to be run by this service. - Task* task_; - - // Handler object to represent the position of the task in the queue. - class task_handler - : public handler_queue::handler - { - public: - task_handler() - : handler_queue::handler(0, 0) - { - } - } task_handler_; - - // Whether the task has been interrupted. - bool task_interrupted_; - - // The count of unfinished work. - int outstanding_work_; - - // The queue of handlers that are ready to be delivered. - handler_queue handler_queue_; - - // Flag to indicate that the dispatcher has been stopped. - bool stopped_; - - // Flag to indicate that the dispatcher has been shut down. - bool shutdown_; - - // Structure containing information about an idle thread. - struct idle_thread_info - { - event wakeup_event; - idle_thread_info* next; - }; - - // The number of threads that are currently idle. - idle_thread_info* first_idle_thread_; -}; - -} // namespace detail -} // namespace asio -} // namespace boost - -#include <boost/system/error_code.hpp> -#include <boost/asio/detail/pop_options.hpp> - -#endif // defined(BOOST_ASIO_ENABLE_TWO_LOCK_QUEUE) - -#endif // BOOST_ASIO_DETAIL_TASK_IO_SERVICE_HPP |