148 lines
4.4 KiB
C++
148 lines
4.4 KiB
C++
//
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// detail/winrt_timer_scheduler.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASIO_DETAIL_WINRT_TIMER_SCHEDULER_HPP
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#define ASIO_DETAIL_WINRT_TIMER_SCHEDULER_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/config.hpp"
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#if defined(ASIO_WINDOWS_RUNTIME)
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#include <cstddef>
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#include "asio/detail/event.hpp"
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#include "asio/detail/limits.hpp"
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#include "asio/detail/mutex.hpp"
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#include "asio/detail/op_queue.hpp"
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#include "asio/detail/thread.hpp"
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#include "asio/detail/timer_queue_base.hpp"
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#include "asio/detail/timer_queue_set.hpp"
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#include "asio/detail/wait_op.hpp"
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#include "asio/execution_context.hpp"
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#if defined(ASIO_HAS_IOCP)
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# include "asio/detail/win_iocp_io_context.hpp"
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#else // defined(ASIO_HAS_IOCP)
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# include "asio/detail/scheduler.hpp"
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#endif // defined(ASIO_HAS_IOCP)
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#if defined(ASIO_HAS_IOCP)
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# include "asio/detail/thread.hpp"
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#endif // defined(ASIO_HAS_IOCP)
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#include "asio/detail/push_options.hpp"
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namespace asio {
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namespace detail {
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class winrt_timer_scheduler
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: public execution_context_service_base<winrt_timer_scheduler>
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{
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public:
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// Constructor.
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ASIO_DECL winrt_timer_scheduler(execution_context& context);
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// Destructor.
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ASIO_DECL ~winrt_timer_scheduler();
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// Destroy all user-defined handler objects owned by the service.
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ASIO_DECL void shutdown();
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// Recreate internal descriptors following a fork.
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ASIO_DECL void notify_fork(execution_context::fork_event fork_ev);
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// Initialise the task. No effect as this class uses its own thread.
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ASIO_DECL void init_task();
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// Add a new timer queue to the reactor.
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template <typename Time_Traits>
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void add_timer_queue(timer_queue<Time_Traits>& queue);
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// Remove a timer queue from the reactor.
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template <typename Time_Traits>
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void remove_timer_queue(timer_queue<Time_Traits>& queue);
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// Schedule a new operation in the given timer queue to expire at the
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// specified absolute time.
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template <typename Time_Traits>
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void schedule_timer(timer_queue<Time_Traits>& queue,
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const typename Time_Traits::time_type& time,
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typename timer_queue<Time_Traits>::per_timer_data& timer, wait_op* op);
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// Cancel the timer operations associated with the given token. Returns the
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// number of operations that have been posted or dispatched.
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template <typename Time_Traits>
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std::size_t cancel_timer(timer_queue<Time_Traits>& queue,
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typename timer_queue<Time_Traits>::per_timer_data& timer,
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std::size_t max_cancelled = (std::numeric_limits<std::size_t>::max)());
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// Move the timer operations associated with the given timer.
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template <typename Time_Traits>
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void move_timer(timer_queue<Time_Traits>& queue,
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typename timer_queue<Time_Traits>::per_timer_data& to,
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typename timer_queue<Time_Traits>::per_timer_data& from);
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private:
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// Run the select loop in the thread.
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ASIO_DECL void run_thread();
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// Entry point for the select loop thread.
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ASIO_DECL static void call_run_thread(winrt_timer_scheduler* reactor);
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// Helper function to add a new timer queue.
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ASIO_DECL void do_add_timer_queue(timer_queue_base& queue);
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// Helper function to remove a timer queue.
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ASIO_DECL void do_remove_timer_queue(timer_queue_base& queue);
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// The scheduler implementation used to post completions.
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#if defined(ASIO_HAS_IOCP)
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typedef class win_iocp_io_context scheduler_impl;
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#else
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typedef class scheduler scheduler_impl;
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#endif
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scheduler_impl& scheduler_;
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// Mutex used to protect internal variables.
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asio::detail::mutex mutex_;
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// Event used to wake up background thread.
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asio::detail::event event_;
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// The timer queues.
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timer_queue_set timer_queues_;
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// The background thread that is waiting for timers to expire.
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asio::detail::thread* thread_;
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// Does the background thread need to stop.
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bool stop_thread_;
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// Whether the service has been shut down.
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bool shutdown_;
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};
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} // namespace detail
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} // namespace asio
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#include "asio/detail/pop_options.hpp"
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#include "asio/detail/impl/winrt_timer_scheduler.hpp"
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#if defined(ASIO_HEADER_ONLY)
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# include "asio/detail/impl/winrt_timer_scheduler.ipp"
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#endif // defined(ASIO_HEADER_ONLY)
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#endif // defined(ASIO_WINDOWS_RUNTIME)
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#endif // ASIO_DETAIL_WINRT_TIMER_SCHEDULER_HPP
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