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-rw-r--r--lib/asio/detail/strand_service.hpp142
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diff --git a/lib/asio/detail/strand_service.hpp b/lib/asio/detail/strand_service.hpp
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-//
-// detail/strand_service.hpp
-// ~~~~~~~~~~~~~~~~~~~~~~~~~
-//
-// Copyright (c) 2003-2018 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 ASIO_DETAIL_STRAND_SERVICE_HPP
-#define ASIO_DETAIL_STRAND_SERVICE_HPP
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1200)
-# pragma once
-#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
-
-#include "asio/detail/config.hpp"
-#include "asio/io_context.hpp"
-#include "asio/detail/mutex.hpp"
-#include "asio/detail/op_queue.hpp"
-#include "asio/detail/operation.hpp"
-#include "asio/detail/scoped_ptr.hpp"
-
-#include "asio/detail/push_options.hpp"
-
-namespace asio {
-namespace detail {
-
-// Default service implementation for a strand.
-class strand_service
- : public asio::detail::service_base<strand_service>
-{
-private:
- // Helper class to re-post the strand on exit.
- struct on_do_complete_exit;
-
- // Helper class to re-post the strand on exit.
- struct on_dispatch_exit;
-
-public:
-
- // The underlying implementation of a strand.
- class strand_impl
- : public operation
- {
- public:
- strand_impl();
-
- private:
- // Only this service will have access to the internal values.
- friend class strand_service;
- friend struct on_do_complete_exit;
- friend struct on_dispatch_exit;
-
- // Mutex to protect access to internal data.
- asio::detail::mutex mutex_;
-
- // Indicates whether the strand is currently "locked" by a handler. This
- // means that there is a handler upcall in progress, or that the strand
- // itself has been scheduled in order to invoke some pending handlers.
- bool locked_;
-
- // The handlers that are waiting on the strand but should not be run until
- // after the next time the strand is scheduled. This queue must only be
- // modified while the mutex is locked.
- op_queue<operation> waiting_queue_;
-
- // The handlers that are ready to be run. Logically speaking, these are the
- // handlers that hold the strand's lock. The ready queue is only modified
- // from within the strand and so may be accessed without locking the mutex.
- op_queue<operation> ready_queue_;
- };
-
- typedef strand_impl* implementation_type;
-
- // Construct a new strand service for the specified io_context.
- ASIO_DECL explicit strand_service(asio::io_context& io_context);
-
- // Destroy all user-defined handler objects owned by the service.
- ASIO_DECL void shutdown();
-
- // Construct a new strand implementation.
- ASIO_DECL void construct(implementation_type& impl);
-
- // Request the io_context to invoke the given handler.
- template <typename Handler>
- void dispatch(implementation_type& impl, Handler& handler);
-
- // Request the io_context to invoke the given handler and return immediately.
- template <typename Handler>
- void post(implementation_type& impl, Handler& handler);
-
- // Determine whether the strand is running in the current thread.
- ASIO_DECL bool running_in_this_thread(
- const implementation_type& impl) const;
-
-private:
- // Helper function to dispatch a handler. Returns true if the handler should
- // be dispatched immediately.
- ASIO_DECL bool do_dispatch(implementation_type& impl, operation* op);
-
- // Helper fiunction to post a handler.
- ASIO_DECL void do_post(implementation_type& impl,
- operation* op, bool is_continuation);
-
- ASIO_DECL static void do_complete(void* owner,
- operation* base, const asio::error_code& ec,
- std::size_t bytes_transferred);
-
- // The io_context implementation used to post completions.
- io_context_impl& io_context_;
-
- // Mutex to protect access to the array of implementations.
- asio::detail::mutex mutex_;
-
- // Number of implementations shared between all strand objects.
-#if defined(ASIO_STRAND_IMPLEMENTATIONS)
- enum { num_implementations = ASIO_STRAND_IMPLEMENTATIONS };
-#else // defined(ASIO_STRAND_IMPLEMENTATIONS)
- enum { num_implementations = 193 };
-#endif // defined(ASIO_STRAND_IMPLEMENTATIONS)
-
- // Pool of implementations.
- scoped_ptr<strand_impl> implementations_[num_implementations];
-
- // Extra value used when hashing to prevent recycled memory locations from
- // getting the same strand implementation.
- std::size_t salt_;
-};
-
-} // namespace detail
-} // namespace asio
-
-#include "asio/detail/pop_options.hpp"
-
-#include "asio/detail/impl/strand_service.hpp"
-#if defined(ASIO_HEADER_ONLY)
-# include "asio/detail/impl/strand_service.ipp"
-#endif // defined(ASIO_HEADER_ONLY)
-
-#endif // ASIO_DETAIL_STRAND_SERVICE_HPP