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Diffstat (limited to 'lib/asio/detail/impl/strand_service.ipp')
-rw-r--r-- | lib/asio/detail/impl/strand_service.ipp | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/lib/asio/detail/impl/strand_service.ipp b/lib/asio/detail/impl/strand_service.ipp deleted file mode 100644 index cbaf25b..0000000 --- a/lib/asio/detail/impl/strand_service.ipp +++ /dev/null @@ -1,177 +0,0 @@ -// -// detail/impl/strand_service.ipp -// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -// -// 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_IMPL_STRAND_SERVICE_IPP -#define ASIO_DETAIL_IMPL_STRAND_SERVICE_IPP - -#if defined(_MSC_VER) && (_MSC_VER >= 1200) -# pragma once -#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) - -#include "asio/detail/config.hpp" -#include "asio/detail/call_stack.hpp" -#include "asio/detail/strand_service.hpp" - -#include "asio/detail/push_options.hpp" - -namespace asio { -namespace detail { - -struct strand_service::on_do_complete_exit -{ - io_context_impl* owner_; - strand_impl* impl_; - - ~on_do_complete_exit() - { - impl_->mutex_.lock(); - impl_->ready_queue_.push(impl_->waiting_queue_); - bool more_handlers = impl_->locked_ = !impl_->ready_queue_.empty(); - impl_->mutex_.unlock(); - - if (more_handlers) - owner_->post_immediate_completion(impl_, true); - } -}; - -strand_service::strand_service(asio::io_context& io_context) - : asio::detail::service_base<strand_service>(io_context), - io_context_(asio::use_service<io_context_impl>(io_context)), - mutex_(), - salt_(0) -{ -} - -void strand_service::shutdown() -{ - op_queue<operation> ops; - - asio::detail::mutex::scoped_lock lock(mutex_); - - for (std::size_t i = 0; i < num_implementations; ++i) - { - if (strand_impl* impl = implementations_[i].get()) - { - ops.push(impl->waiting_queue_); - ops.push(impl->ready_queue_); - } - } -} - -void strand_service::construct(strand_service::implementation_type& impl) -{ - asio::detail::mutex::scoped_lock lock(mutex_); - - std::size_t salt = salt_++; -#if defined(ASIO_ENABLE_SEQUENTIAL_STRAND_ALLOCATION) - std::size_t index = salt; -#else // defined(ASIO_ENABLE_SEQUENTIAL_STRAND_ALLOCATION) - std::size_t index = reinterpret_cast<std::size_t>(&impl); - index += (reinterpret_cast<std::size_t>(&impl) >> 3); - index ^= salt + 0x9e3779b9 + (index << 6) + (index >> 2); -#endif // defined(ASIO_ENABLE_SEQUENTIAL_STRAND_ALLOCATION) - index = index % num_implementations; - - if (!implementations_[index].get()) - implementations_[index].reset(new strand_impl); - impl = implementations_[index].get(); -} - -bool strand_service::running_in_this_thread( - const implementation_type& impl) const -{ - return call_stack<strand_impl>::contains(impl) != 0; -} - -bool strand_service::do_dispatch(implementation_type& impl, operation* op) -{ - // If we are running inside the io_context, and no other handler already - // holds the strand lock, then the handler can run immediately. - bool can_dispatch = io_context_.can_dispatch(); - impl->mutex_.lock(); - if (can_dispatch && !impl->locked_) - { - // Immediate invocation is allowed. - impl->locked_ = true; - impl->mutex_.unlock(); - return true; - } - - if (impl->locked_) - { - // Some other handler already holds the strand lock. Enqueue for later. - impl->waiting_queue_.push(op); - impl->mutex_.unlock(); - } - else - { - // The handler is acquiring the strand lock and so is responsible for - // scheduling the strand. - impl->locked_ = true; - impl->mutex_.unlock(); - impl->ready_queue_.push(op); - io_context_.post_immediate_completion(impl, false); - } - - return false; -} - -void strand_service::do_post(implementation_type& impl, - operation* op, bool is_continuation) -{ - impl->mutex_.lock(); - if (impl->locked_) - { - // Some other handler already holds the strand lock. Enqueue for later. - impl->waiting_queue_.push(op); - impl->mutex_.unlock(); - } - else - { - // The handler is acquiring the strand lock and so is responsible for - // scheduling the strand. - impl->locked_ = true; - impl->mutex_.unlock(); - impl->ready_queue_.push(op); - io_context_.post_immediate_completion(impl, is_continuation); - } -} - -void strand_service::do_complete(void* owner, operation* base, - const asio::error_code& ec, std::size_t /*bytes_transferred*/) -{ - if (owner) - { - strand_impl* impl = static_cast<strand_impl*>(base); - - // Indicate that this strand is executing on the current thread. - call_stack<strand_impl>::context ctx(impl); - - // Ensure the next handler, if any, is scheduled on block exit. - on_do_complete_exit on_exit; - on_exit.owner_ = static_cast<io_context_impl*>(owner); - on_exit.impl_ = impl; - - // Run all ready handlers. No lock is required since the ready queue is - // accessed only within the strand. - while (operation* o = impl->ready_queue_.front()) - { - impl->ready_queue_.pop(); - o->complete(owner, ec, 0); - } - } -} - -} // namespace detail -} // namespace asio - -#include "asio/detail/pop_options.hpp" - -#endif // ASIO_DETAIL_IMPL_STRAND_SERVICE_IPP |